ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • ENERGY PRODUCTION AND CONVERSION  (452)
  • 1975-1979  (452)
  • 1960-1964
  • 1977  (452)
  • 1
    facet.materialart.
    Unknown
    Energy: A continuing bibliography with indexes, issue 12 (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: This bibliography lists 584 reports, articles, and other documents introduced into the NASA scientific and technical information system from October 1, 1976 through December 31, 1976.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-SP-7043(12)
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unknown
    Space solar power. Description of concept, results of preliminary studies, requirements for evaluation (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The nation is actively pursuing alternate sources of energy because of the problems or concerns related to obtaining required energy for the future from oil, gas, nuclear, and coal sources. Solar energy is an obvious candidate for consideration. Its use in the past has been limited by the relative cost of collecting and converting solar energy into electrical power. The increasing costs of other energy sources will make solar energy more attractive. During recent years a new concept for the collection of solar energy has been developed. This concept involves the location of solar power stations in space. The concept, results of preliminary studies, and requirements for space evaluation of such a project are discussed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-79436
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 3
    facet.materialart.
    Unknown
    NASA's OAST program: An overview (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The program was split into four areas which include: high energy density, long life batteries; low cost high capacity battery application; very high energy density batteries; and electrochemical research and technology program. Outlines are presented which show the approaches used and the accomplishments of each program area.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA. Goddard Space Flight Center The 1977 Goddard Space Flight Center Battery Workshop; p 111-118
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 4
    facet.materialart.
    Unknown
    Formation of stored heat by means of bled steam during times of load reduction and its use in peak load times (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Technical possibilities and economic advantages of integrating hot water storage systems into power plants fired with fossil fuels are discussed. The systems can be charged during times of load reduction and then used for back-up during peak load periods. Investment costs are higher for such systems than for gas turbine power plants fired with natural gas or light oil installed to meet peak load demand. However, by improving specific heat consumption by about 1,000 kcal/k ohm, which thus reduces the related costs, investment costs will be compensated for, so that power production costs will not increase.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-75147
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 5
    facet.materialart.
    Unknown
    Boeing selected to build world's largest windmill (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-NEWS-RELEASE-77-141 , P77-10139
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 6
    facet.materialart.
    Unknown
    Energy: A continuing bibliography with indexes, issue 15 (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: This bibliography lists 1112 reports, articles, and other documents introduced into the NASA scientific and technical information system from July 1, 1977 through September 30, 1977.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-SP-7043(15)
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 7
    facet.materialart.
    Unknown
    The NASA Energy Conservation Program (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Large energy-intensive research and test equipment at NASA installations is identified, and methods for reducing energy consumption outlined. However, some of the research facilities are involved in developing more efficient, fuel-conserving aircraft, and tradeoffs between immediate and long-term conservation may be necessary. Major programs for conservation include: computer-based systems to automatically monitor and control utility consumption; a steam-producing solid waste incinerator; and a computer-based cost analysis technique to engineer more efficient heating and cooling of buildings. Alternate energy sources in operation or under evaluation include: solar collectors; electric vehicles; and ultrasonically emulsified fuel to attain higher combustion efficiency. Management support, cooperative participation by employees, and effective reporting systems for conservation programs, are also discussed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: AIAA PAPER 77-1005 , Conference on New Options in Energy Technology; Aug 02, 1977 - Aug 04, 1977; San Francisco, CA; US
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 8
    facet.materialart.
    Unknown
    Test power generator for space passes 30,000-hour mark at Lewis (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-NEWS-RELEASE-77-178 , P77-10176
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 9
    facet.materialart.
    Unknown
    Energy: A continuing bibliography with indexes, issue 14 (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: This bibliography lists 1000 reports, articles, and other documents introduced into the NASA scientific and technical information system from April 1, 1977 to June 30, 1977.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-SP-7043(14)
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 10
    facet.materialart.
    Unknown
    Pump/Control System Minimum Operating Cost Testing (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: A preliminary evaluation of pump performance was initiated to determine the efficiencies of an arbitrary group of small pumps. Trends in factors affecting energy usage in typical prime movers which might be used in liquid transport solar systems were assessed. Comparisons of centrifugal pump efficiencies were made from one manufacturer to another. Tests were also made on two positive-displacement pumps and comparisons with centrifugal pumps were observed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-150604 , MFS-23934
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 11
    facet.materialart.
    Unknown
    Comparison of computer codes for calculating dynamic loads in wind turbines (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Seven computer codes for analyzing performance and loads in large, horizontal-axis wind turbines were used to calculate blade bending moment loads for two operational conditions of the 100 kW Mod-O wind turbine. Results are compared with test data on the basis of cyclic loads, peak loads, and harmonic contents. Four of the seven codes include rotor-tower interaction and three are limited to rotor analysis. With a few exceptions, all calculated loads were within 25% of nominal test data.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Biennial Conference and Workshop on Wind Energy Conversion Systems; Sept. 19-21, 1977; Washington, DC
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 12
    facet.materialart.
    Unknown
    The impact of H2S emissions on future geothermal power generation - The Geysers region, California (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The future potential for geothermal power generation in the Geysers region of California is as much as 10 times the current 502 MW(e) capacity. However, environmental factors such as H2S emissions and institutional considerations may play the primary role in determining the rate and ultimate level of development. In this paper a scenario of future geothermal generation capacity and H2S emissions in the Geysers region is presented. Problem areas associated with H2S emissions, H2S abatement processes, plant operations, and government agency resources are described. The impact of H2S emissions on future development and the views of effected organizations are discussed. Potential actions needed to remove these constraints are summarized.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: IEEE PAPER A 77 816-2 , Joint Power Generation Conference; Sept. 18-21, 1977; Los Angeles, CA; US
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 13
    facet.materialart.
    Unknown
    Development and fabrication of a concentrating solar collector subsystem (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The finalization of designs, fabrication of the new lens, receiver, and tracking box and a review of the contract status are presented.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-150713 , QR-3 , QR-4
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 14
    facet.materialart.
    Unknown
    Open-Cycle Gas Turbine/Steam Turbine Combined Cycles with synthetic fuels from coal (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The Open-Cycle Gas Turbine/Steam Turbine Combined Cycle can be an effective energy conversion system for converting coal to electricity. The intermediate step in this energy conversion process is to convert the coal into a fuel acceptable to a gas turbine. This can be accomplished by producing a synthetic gas or liquid, and by removing, in the fuel conversion step, the elements in the fuel that would be harmful to the environment if combusted. In this paper, two open-cycle gas turbine combined systems are evaluated: one employing an integrated low-Btu gasifier, and one utilizing a semi-clean liquid fuel. A consistent technical/economic information base is developed for these two systems, and is compared with a reference steam plant burning coal directly in a conventional furnace.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: ASME PAPER 77-WA/ENER-9 , American Society of Mechanical Engineers, Winter Annual Meeting; Nov 27, 1977 - Dec 02, 1977; Atlanta, GA
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 15
    facet.materialart.
    Unknown
    Experimental evaluation of a fixed collector employing vee-trough concentrator and vacuum tube receivers (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A test bed for experimental evaluation of a fixed solar collector which combines an evacuated glass tube solar receiver with a flat plate/black chrome plated copper absorber and an asymmetric vee-trough concentrator was designed and constructed. Earlier predictions of thermal performance were compared with test data acquired for a bare vacuum tube receiver; and receiver tubes with Alzak aluminum, aluminized FEP Teflon film laminated sheet metal and second surface ordinary mirror reflectors. Test results and system economics as well as objectives of an ongoing program to obtain long-term performance data are discussed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Winter Annual Meeting; Nov 27, 1977 - Dec 02, 1977; Atlanta, GA
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 16
    facet.materialart.
    Unknown
    Pulse battery charger employing 1000 ampere transistor switches (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A pulse charger which uses water-cooled 1000-amp transistor switches has been developed to determine empirically the best methods of rapidly charging large cells in the one- to two-volt range. The pulse charger is capable of delivering a positive current from 0 to 1000 amps and extracting a negative current from 0 to 1000 amps. The charger can supply a 1000-amp DC charge or can switch 1000 amps at a rate of 1000 Hz. Special attention is given to problems associated with rapid switching of high currents through use of transistors.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Annual Conference; Oct 02, 1977 - Oct 06, 1977; Los Angeles, CA
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 17
    facet.materialart.
    Unknown
    Status of the DOE /STOR/-sponsored national program on hydrogen production from water via thermochemical cycles (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A pure thermochemical cycle is a system of linked regenerative chemical reactions which accepts only water and heat and produces hydrogen. Thermochemical cycles are potentially a more efficient and cheaper means of producing hydrogen from water than is the generation of electricity followed by electrolysis. The Energy Storage Systems Division of the Department of Energy is currently funding a national program on thermochemical hydrogen production. The National Aeronautics and Space Administration is responsible for the technical management of this program. The goal is to develop a cycle which can potentially operate with an efficiency greater than 40% using a heat source providing a maximum available temperature of 1150 K. A closed bench-scale demonstration of such a cycle would follow. This cycle would be labeled a 'reference cycle' and would serve as a baseline against which future cycles would be compared.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Miami International Conference on Alternative Energy Sources; Dec 05, 1977 - Dec 07, 1977; Miami Beach, FL; US
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 18
    facet.materialart.
    Unknown
    Economical photovoltaic power generation with heat recovery (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Three designs for conversion of solar radiation to electricity and thermal energy are analyzed. The objective of these converters is to increase the electric and thermal output for each photovoltaic array so as to lower the cell cost relative to the amount of energy delivered. An analysis of the economical aspects of conversion by photovoltaic cells with heat recovery is carried out in terms of hypothetical examples. Thus, it is shown that the original cost of say $40,000 per generated kilowat can be reduced to $572.00 per kilowatt by increasing the original electric output of 1 kW to 10 kW in electricity and 60 kW in thermal energy. The newly derived specific cost is only 1.4 percent of the original one. It is expected that a cost reduction of roughly 2% of the present specific cost per kilowatt will greatly stimulate public acceptance of photovoltaic terrestrial conversion to electricity.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Southeast Region 3 Conference; Apr 04, 1977 - Apr 06, 1977; Williamsburg, VA
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 19
    facet.materialart.
    Unknown
    Marshall Space Flight Center development program for solar heating and cooling systems (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: International Solar Energy Society; Jun 06, 1977 - Jun 10, 1977; Orlando, FL
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 20
    facet.materialart.
    Unknown
    Large-scale thermal energy storage using sodium hydroxide /NaOH/ (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A technique employing NaOH phase change material for large-scale thermal energy storage to 900 F (482 C) is described; the concept consists of 12-foot diameter by 60-foot long cylindrical steel shell with closely spaced internal tubes similar to a shell and tube heat exchanger. The NaOH heat storage medium fills the space between the tubes and outer shell. To charge the system, superheated steam flowing through the tubes melts and raises the temperature of NaOH; for discharge, pressurized water flows through the same tube bundle. A technique for system design and cost estimation is shown. General technical and economic properties of the storage unit integrated into a solar power plant are discussed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: International Solar Energy Society; Jun 06, 1977 - Jun 10, 1977; Orlando, FL
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 21
    facet.materialart.
    Unknown
    Silicon ribbon growth by a capillary action shaping technique (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Substantial improvements in ribbon surface quality are achieved with a higher melt meniscus than that attainable with the film-fed (EFG) growth technique. A capillary action shaping method is described in which meniscus shaping for the desired ribbon geometry occurs at the vertex of a wettable die. As ribbon growth depletes the melt meniscus, capillary action supplies replacement material. Topics discussed cover experimental apparatus and growth procedures; die materials investigations, fabrication and evaluation; process development for 25 mm, 38 mm, 50 mm and 100 mm silicon ribbons; and long grain direct solidification of silicon. Methods for the structural and electrical characterization of cast silicon ribbons are assessed as well as silicon ribbon technology for the 1978 to 1986 period.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157547 , DOE/JPL-954144-78/1
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 22
    facet.materialart.
    Unknown
    Solar heating and cooling systems design and development (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The development of twelve prototype solar heating/cooling systems, six heating and six heating and cooling systems, two each for single family, multi-family, and commercial applications, is reported. Schedules and technical discussions, along with illustrations on the progress made from April 1, 1977 through June 30, 1977 are detailed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-150770 , QR-4
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 23
    facet.materialart.
    Unknown
    Heat exchanger-ingot casting/slicing process, phase 1: Silicon sheet growth development for the large area silicon sheet task of the low cost silicon solar array project (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A controlled growth, heat-flow and cool-down process is described that yielded silicon with a high degree of single crystallinity. Even when the seed melted out, very large grains formed. Solar cell samples made from cast material yielded conversion efficiency of over 9%. Representative characterizations of grown silicon demonstrated a dislocation density of less than 100/sq cm and a minority carrier diffusion length of 31 micron. The source of silicon carbide in silicon ingots was identified to be from graphite retainers in contact with silica crucibles. Higher growth rates were achieved with the use of a graphite plug at the bottom of the silica crucible.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157315 , ERDA/JPL-954373-77/4
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 24
    facet.materialart.
    Unknown
    Concentrating solar collector subsystem: Preliminary design package (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Preliminary design data are presented for a concentrating solar collector including an attitude controller. Provided are schedules, technical status, all documents required for preliminary design, and other program activities.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-150714 , REPT-10046-4 , QR-1
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 25
    facet.materialart.
    Unknown
    Development and fabrication of a concentrating solar collector subsystem (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The progress of work on the evacuated receiver, lens design, lens die fabrication, and improvements on components, production techniques, and performance testing is discussed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-150712 , QR-2
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 26
    facet.materialart.
    Unknown
    Prototype solar heating and combined heating and cooling systems (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Schedules and technical progress in the development of eight prototype solar heating and combined solar heating and cooling systems are reported. Particular emphasis is given to the analysis and preliminary design for the cooling subsystem, and the setup and testing of a horizontal thermal energy storage tank configuration and collector shroud evaluation.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-150693 , QR-5
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 27
    facet.materialart.
    Unknown
    Prototype solar heating and combined heating and cooling systems (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Eight prototype solar heating and combined heating and cooling systems are being developed. The effort includes development, manufacture, test, installation, maintenance, problem resolution, and performance evaluation.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-150692 , QR-4
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 28
    facet.materialart.
    Unknown
    Prototype solar heating and combined heating and cooling systems (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: System analysis activities were directed toward refining the heating system parameters. Trade studies were performed to support hardware selections for all systems and for the heating only operational test sites in particular. The heating system qualification tests were supported by predicting qualification test component performance prior to conducting the test.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-150691 , QR-3
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 29
    facet.materialart.
    Unknown
    Prototype solar heating and combined heating and cooling systems (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: For abstract, see N78-25537.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-150687
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 30
    facet.materialart.
    Unknown
    Coal desulfurization by low temperature chlorinolysis, phase 1 (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The reported activity covers laboratory scale experiments on twelve bituminous, sub-bituminous and lignite coals, and preliminary design and specifications for bench-scale and mini-pilot plant equipment.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157172 , JPL-PUB-78-8
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 31
    facet.materialart.
    Unknown
    High velocity continuous-flow reactor for the production of solar grade silicon (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The feasibility of a high volume, high velocity continuous reduction reactor as an economical means of producing solar grade silicon was tested. Bromosilanes and hydrogen were used as the feedstocks for the reactor along with preheated silicon particles which function both as nucleation and deposition sites. A complete reactor system was designed and fabricated. Initial preheating studies have shown the stability of tetrabromosilane to being heated as well as the ability to preheat hydrogen to the desired temperature range. Several test runs were made and some silicon was obtained from runs carried out at temperatures in excess of 1180 K.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157068 , ERDA/JPL-954914-77/1 , QR-1
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 32
    facet.materialart.
    Unknown
    High efficiency, long life terrestrial solar panel (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The design of a high efficiency, long life terrestrial module was completed. It utilized 256 rectangular, high efficiency solar cells to achieve high packing density and electrical output. Tooling for the fabrication of solar cells was in house and evaluation of the cell performance was begun. Based on the power output analysis, the goal of a 13% efficiency module was achievable.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157060 , DOE/JPL-954831-77/12 , QR-1
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 33
    facet.materialart.
    Unknown
    Silicon web process development (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Thirty-five (35) furnace runs were carried out during this quarter, of which 25 produced a total of 120 web crystals. The two main thermal models for the dendritic growth process were completed and are being used to assist the design of the thermal geometry of the web growth apparatus. The first model, a finite element representation of the susceptor and crucible, was refined to give greater precision and resolution in the critical central region of the melt. The second thermal model, which describes the dissipation of the latent heat to generate thickness-velocity data, was completed. Dendritic web samples were fabricated into solar cells using a standard configuration and a standard process for a N(+) -P-P(+) configuration. The detailed engineering design was completed for a new dendritic web growth facility of greater width capability than previous facilities.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157098 , ERDA/JPL-954654-77/2 , QR-2
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 34
    facet.materialart.
    Unknown
    Low cost silicon solar array project silicon materials task (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A program was established to develop a high temperature silicon production process using existing electric arc heater technology. Silicon tetrachloride and a reductant will be injected into an arc heated mixture of hydrogen and argon. Under these high temperature conditions, a very rapid reaction is expected to occur and proceed essentially to completion, yielding silicon and gaseous sodium chloride. Techniques for high temperature separation and collection of the molten silicon will be developed using standard engineering approaches, and the salt vapor will later be electrolytically separated into its elemental constituents for recycle. Preliminary technical evaluations and economic projections indicate not only that this process appears to be feasible, but that it also has the advantages of rapid, high capacity production of good quality molten silicon at a nominal cost.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157092 , ERDA/JPL-954589-77/3
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 35
    facet.materialart.
    Unknown
    Energy requirement for the production of silicon solar arrays (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The results of a study to investigate the feasibility of manufacturing photovoltaic solar array modules by the use of energy obtained from similar or identical photovoltaic sources are presented. The primary objective of this investigation was the characterization of the energy requirements of current and developing technologies which comprise the photovoltaic field. For cross-checking the energies of prevailing technologies data were also used and the wide-range assessment of alternative technologies included different refinement methods, various ways of producing light sheets, semicrystalline cells, etc. Energy data are utilized to model the behavior of a future solar breeder plant under various operational conditions.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157071 , SX/111/4 , ERDA/JPL-954606-77/4
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 36
    facet.materialart.
    Unknown
    Integral glass encapsulation for solar arrays (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Electrostatic bonding has been used to join silicon solar cells to borosilicate glass without the aid of any organic binders or adhesives. The results of this investigation have been to demonstrate, without question, the feasibility of this process as an encapsulation technique. The potential of ESB for terrestrial solar arrays was clearly shown. The process is fast, reproducible, and produces a permanent bond between glass and silicon that is stronger than the silicon itself. Since this process is a glass sealing technique requiring no organics it makes moisture tight sealing of solar cells possible.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157091 , DOE/JPL-954521-77/3 , IR-10046-1
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 37
    facet.materialart.
    Unknown
    Investigation of test methods, material properties, and processes for solar cell encapsulants. Encapsulation task of the low-cost silicon solar array project (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: During this quarter, flat-plate solar collector systems were considered and six basic construction elements were identified: outer coatings, superstrates, pottants, substrates, undercoats, and adhesives. Materials surveys were then initiated to discover either generic classes or/and specific products to function as each construction element. Cost data included in the surveys permit ready evaluation of each material. Silicones, fluorocarbons, glass, and acrylic polymers have the highest inherent weatherability of materials studied to date. Only acrylics, however, combine low costs, environmental resistance, and potential processability. This class will receive particular emphasis.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157149 , ERDA/JPL-954527-77/4
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 38
    facet.materialart.
    Unknown
    Novel duplex vapor-electrochemical method for silicon solar cells (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Silicon obtained by the SiF4-Na reaction was analyzed by spark source mass spectrometry (SSMS). Silicon samples prepared from induction melted powder were evaluated for electrical properties using four point probe conductivity and thermoelectric methods. SiF4-Na reaction under P sub SiF4 greater than 1 atmosphere. The amount of silicon produced was increased from 25 g per batch (in the glass reactor) to greater than 70 g per batch in the stainless steel reactor. The study of the effects of reaction variables such as P sub SiF4 and maximum temperature attained on the particle size of silicon powder showed that the silicon particle size tends to grow larger with increasing pressure of the SiF4 gas in the reaction system.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157090 , ERDA/JPL-954471-77/4 , QPR-7
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 39
    facet.materialart.
    Unknown
    Semiconductor grade, solar silicon purification project (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The conversion of metallurgical grade silicon into semiconductor grade silicon by way of a three step SiF2 polymer transport purification process was investigated. Developments in the following areas were also examined: (1) spectroscopic analysis and characterization of (SiF2) sub x polymer and Si sub x F sub y homologue conversion; (2) demonstration runs on the near continuous apparatus; (3) economic analysis; and (4) elemental analysis.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157064 , DOE/JPL-954442-78/1 , REPT-2257/8 , TRP-8
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 40
    facet.materialart.
    Unknown
    Laser-zone growth in a Ribbon-To-Ribbon (RTR) process. Silicon sheet growth development for the large area silicon sheet task of the low cost silicon solar array project (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The Ribbon-to-Ribbon (RTR) approach to silicon ribbon growth is investigated. An existing RTR apparatus is to be upgraded to its full capabilities and operated routinely to investigate and optimize the effects of various growth parameters on growth results. A new RTR apparatus was constructed to incorporate increased capabilities and improvements over the first apparatus and to be capable of continuous growth. New high power lasers were implemented and this led to major improvements in growth velocity -- 4 inch/min. growth has been demonstrated. A major step in demonstration of the full feasibility of the RTR process is reported in the demonstration of RTR growth from CVD polyribbon rather than sliced polyribbon ingots. Average solar cell efficiencies of greater than 9% and a best cell efficiency of 11.7% are reported. Processing was shown to provide a substantial improvement in material minority carrier diffusion length. An economic analysis is reported which treats both the polyribbon fabrication and RTR processes.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: DOE/JPL-954376-78/1 , REPT-2256/8
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 41
    facet.materialart.
    Unknown
    Dip-coating process: Silicon sheet growth development for the large-area silicon sheet task of the low-cost silicon solar array project (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The objective of this research program is to investigate the technical and economic feasibility of producing solar-cell-quality sheet silicon by coating one surface of carbonized ceramic substrates with a thin layer of large-grain polycrystalline silicon from the melt. The past quarter demonstrated significant progress in several areas. Seeded growth of silicon-on-ceramic (SOC) with an EFG ribbon seed was demonstrated. Different types of mullite were successfully coated with silicon. A new method of deriving minority carrier diffusion length, L sub n from spectral response measurements was evaluated. ECOMOD cost projections were found to be in good agreement with the interim SAMIS method proposed by JPL. On the less positive side, there was a decrease in cell performance which we believe to be due to an unidentified source of impurities.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157072 , ERDA/JPL-954356-77/4 , HONEYWELL-QR-7
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 42
    facet.materialart.
    Unknown
    Low cost silicon solar array project silicon materials task: Establishment of the feasibility of a process capable of low-cost, high volume production of silane (step 1) and the pyrolysis of silane to semiconductor-grade silicon (step 2) (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A quartz fluid bed reactor capable of operating at temperatures of up to 1000 C was designed, constructed, and successfully operated. During a 30 minute experiment, silane was decomposed within the reactor with no pyrolysis occurring on the reactor wall or on the gas injection system. A hammer mill/roller-crusher system appeared to be the most practical method for producing seed material from bulk silicon. No measurable impurities were detected in the silicon powder produced by the free space reactor, using the cathode layer emission spectroscopic technique. Impurity concentration followed by emission spectroscopic examination of the residue indicated a total impurity level of 2 micrograms/gram. A pellet cast from this powder had an electrical resistivity of 35 to 45 ohm-cm and P-type conductivity.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157101 , QPR-9 , DOE/JPL-954334-78/5
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 43
    facet.materialart.
    Unknown
    Low cost silicon solar array project silicon materials task: Establishment of the feasibility of a process capable of low-cost, high volume production of silane (step 1) and the pyrolysis of silane to semiconductor-grade silicon (step 2) (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Extended operation of a small process-development unit routinely produced high quality silane in 97+% yield from dichlorosilane. The production rate was consistent with design loadings for the fractionating column and for the redistribution reactor. A glass fluid-bed reactor was constructed for room temperature operation. The behavior of a bed of silcon particles was observed as a function of various feedstocks, component configurations, and operating conditions. For operating modes other than spouting, the bed behaved in an erratic and unstable manner. A method was developed for casting molten silicon powder into crack-free solid pellets for process evaluation. The silicon powder was melted and cast into thin walled quartz tubes that sacrificially broke on cooling.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157100 , QPR-8 , DOE/JPL-954334-77/4
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 44
    facet.materialart.
    Unknown
    Silicon materials task of the low cost solar array project, phase 2 (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The object of phase 2 of this program is to investigate and define the effects of various processes, contaminants and process-contaminant interactions in the performance of terrestrial solar cells. The major effort this quarter was in the areas of crystal growth and thermal processing, comparison of impurity effects in low and high resistivity silicon, modeling the behavior of p-type ingots containing Mo, and C and, quantitative analysis of bulk lifetime and junction degradation effects in contaminated solar cells. The performance of solar cells fabricated on silicon web crystals grown from melts containing about 10 to the 18th power/cu cm of Cr, Mn, Fe, Ni, Ti, and V, respectively were measured. Deep level spectroscopy of metal-contaminated ingots was employed to determine the level and density of recombination centers due to Ti, V, Ni, and Cr.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157082 , DOE/JPL-954431-78/1 , QR-9
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 45
    facet.materialart.
    Unknown
    Analysis of effects of impurities intentionally incorporated into silicon (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A methodology was developed and implemented to allow silicon samples containing intentionally incorporated impurities to be fabricated into finished solar cells under carefully controlled conditions. The electrical and spectral properties were then measured for each group processed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-156981 , ERDA/JPL-954694-78/1
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 46
    facet.materialart.
    Unknown
    Performance potential of combined cycles integrated with low-Btu gasifiers for future electric utility applications (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A comparison and an assessment of 10 advanced utility power systems on a consistent basis and to a common level of detail were analyzed. Substantial emphasis was given to a combined cycle systems integrated with low-Btu gasifiers. Performance and cost results from that study were presented for these combined cycle systems, together with a comparative evaluation. The effect of the gasifier type and performance and the interface between the gasifier and the power system were discussed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-73775 , E-9567 , Ann. Meeting of the Am. Inst. of Chem. Engr.; Nov 28, 1976 - Dec 02, 1976; Chicago
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 47
    facet.materialart.
    Unknown
    Comparison of computer codes for calculating dynamic loads in wind turbines (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Seven computer codes for analyzing performance and loads in large, horizontal axis wind turbines were used to calculate blade bending moment loads for two operational conditions of the 100 kW Mod-0 wind turbine. Results were compared with test data on the basis of cyclic loads, peak loads, and harmonic contents. Four of the seven codes include rotor-tower interaction and three were limited to rotor analysis. With a few exceptions, all calculated loads were within 25 percent of nominal test data.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-73773 , DOE/NASA/1028-78/16 , E-9577 , Bien. Conf. and Workshop on Wind Energy Conversion Systems; Sep 19, 1977 - Sep 21, 1977; Washington, DC; United States
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 48
    facet.materialart.
    Unknown
    Effluent characterization from a conical pressurized fluid bed (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: To obtain useable corrosion and erosion results it was necessary to have data with several levels of particulate matter in the hot gases. One level of particulate loading was as low as possible so that ideally no erosion and only corrosion occurred. A conical fluidized bed was used to obtain some degree of filtration through the top of the bed which would not be highly fluidized. This would minimize the filtration required for the hot gases or conversely the amount of particulate matter in the hot gases after a given level of filtration by cyclones and/or filters. The data obtained during testing characterized the effluent from the bed at different test conditions. A range of bed heights, coal flows, air flows, limestone flows, and pressure are represented. These tests were made to determine the best operating conditions prior to using the bed to determine erosion and corrosion rates of typical turbine blade materials.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-73897 , E-9524 , Intern. Conf. on Fluidized-Bed Combust.; Dec 12, 1977 - Dec 14, 1977; Washington, DC; United States
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 49
    facet.materialart.
    Unknown
    Modular control subsystems for use in solar heating systems for multi-family dwellings (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Progress in the development of solar heating modular control subsystems is reported. Circuit design, circuit drawings, and printed circuit board layout are discussed along with maintenance manuals, installation instructions, and verification and acceptance tests. Calculations made to determine the predicted performance of the differential thermostat are given including details and results of tests for the offset temperature, and boil and freeze protect points.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-150593
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 50
    facet.materialart.
    Unknown
    Prototype solar heating and hot water systems (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Alternative approaches to solar heating and hot water system configurations were studied, parametrizing the number and location of the dampers, the number and location of the fans, the interface locations with the furnace, the size and type of subsystems, and operating modes. A two-pass air-heating collector was selected based on efficiency and ease of installation. Also, an energy transport module was designed to compactly contain all the mechanical and electrical control components. System performance calculations were carried out over a heating season for the tentative site location at Tunkhnana, Pa. Results illustrate the effect of collector size, storage capacity, and use of a reflector. Factors which affected system performance include site location, insulative quality of the house, and of the system components. A preliminary system performance specification is given.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-150592
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 51
    facet.materialart.
    Unknown
    Quarterly and monthly reports for solar heating and cooling systems (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Two prototype solar heating systems, consisting of the following subsystems: collector, control, and storage, are being developed; research progress is discussed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-150589
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 52
    facet.materialart.
    Unknown
    Prototype solar heating and hot water system (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Progress is reported in the development of a solar heating and hot water system which uses a pyramidal optics solar concentrator for heating, and consists of the following subsystems: collector, control, transport, and site data acquisition. Improvements made in the components and subsystems are discussed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-150575
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 53
    facet.materialart.
    Unknown
    LSSA (low-cost Silicon Solar Array) project (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Work performed in the field of photovoltaic research by the low cost silicon solar array project of jet propulsion laboratory was described. Background technical information was also furnished.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-155944 , JPL-PUB-78-9 , DOE/JPL-1012-77/4 , QR-5
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 54
    facet.materialart.
    Unknown
    Prototype solar heating and cooling systems, including potable hot water (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Progress made in the development, delivery, and support of two prototype solar heating and cooling systems including potable hot water is reported. The system consists of the following subsystems: collector, auxiliary heating, potable hot water, storage, control, transport, and government-furnished site data acquisition. A comparison of the proposed Solaron Heat Pump and Solar Desiccant Heating and Cooling Systems, installation drawings, data on the Akron House at Akron, Ohio, and other program activities are included.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-150576
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 55
    facet.materialart.
    Unknown
    Guntersville Workshop on Solar-Terrestrial Studies (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The separation of purely solar physics from magnetospheric physics, and the effects of solar activity on geomagnetic activity are investigations which can be accomplished using the shuttle orbiter in an extended sortie mode, or an unmanned solar terrestrial observatory powered by the power module in an extended duration mode. When the power module is used with the shuttle in a sortie support mode, both the instrument capacity and the time in orbit of the orbiter can be increased several fold. In the free-flyer mode, the power module would be capable of providing power, basic attitude control, basic thermal control and housekeeping communications for unmanned, large, independent mission payloads in low earth orbit for periods of 6 months or longer. Instrument requirements for interdisciplinary joint observational programs are discussed for studies of the magnetosphere, the atmosphere, sun-weather relationships. Description summary charts of the power module are included.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CP-2037 , University of Alabama in Huntsville/NASA Workshop; Oct 13, 1977 - Oct 17, 1977; Guntersville, AL; United States
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 56
    facet.materialart.
    Unknown
    Energy requirement for the production of silicon solar arrays (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: An assessment of potential changes and alternative technologies which could impact the photovoltaic manufacturing process is presented. Topics discussed include: a multiple wire saw, ribbon growth techniques, silicon casting, and a computer model for a large-scale solar power plant. Emphasis is placed on reducing the energy demands of the manufacturing process.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-155932 , QR-2 , ERDA/JPL-954606-77/2
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 57
    facet.materialart.
    Unknown
    Development of Surfaces Optically Suitable for Flat Solar Panels (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Innovations in reflectometry techniques are described; and the development of an absorbing selective coating is discussed along with details of surface properties. Conclusions as to the parameterization desired for practical applications of selective surfaces are provided.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-150539 , QPR-2
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 58
    facet.materialart.
    Unknown
    Wind turbine generator rotor blade concepts with low cost potential (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Four processed for producing blades are examined. Two use filament winding techniques and two involve filling a mold or form to produce all or part of a blade. The processes are described and a comparison is made of cost, material properties, design and free vibration characteristics. Conclusions are made regarding the feasibility of each process to produce low cost, structurally adequate blades.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-73835 , DOE/NASA/1028-77/13 , E-9422 , Natl. SAMPE Symp.; May 02, 1978 - May 04, 1978; Anaheim, CA; United States
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 59
    facet.materialart.
    Unknown
    Status of the DOE (STOR)-sponsored national program on hydrogen production from water via thermochemical cycles (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The program structure is presented. The activities of the thermochemical cycles program are grouped according to the following categories: (1) specific cycle development, (2) support research and technology, (3) cycle evaluation. Specific objectives and status of on-going activities are discussed. Chemical reaction series for the production of hydrogen are presented. Efficiency and economic evaluations are also discussed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-78825 , E-9529 , Miami Intern. Conf. on Alternative Energy Sources; Dec 05, 1977 - Dec 07, 1977; Miami Beach, FL; United States
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 60
    facet.materialart.
    Unknown
    Silicon on ceramic process. Silicon sheet growth development for the large-area silicon sheet task of the low-cost silicon solar array project (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The technical and economic feasibility of producing solar-cell-quality sheet silicon was investigated. The sheets were made by coating one surface of carbonized ceramic substrates with a thin layer of large-grain polycrystalline silicon from the melt. Significant progress was made in all areas of the program.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-155613 , ERDA/JPL-954356-77/3 , AR-2
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 61
    facet.materialart.
    Unknown
    Thermal energy storage heat exchanger: Molten salt heat exchanger design for utility power plants (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Sizing procedures are presented for latent heat thermal energy storage systems that can be used for electric utility off-peak energy storage, solar power plants and other preliminary design applications.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-135245
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 62
    facet.materialart.
    Unknown
    US terrestrial solar cell calibration and measurement procedures (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A workshop was held in the fall of 1976, to evaluate and revise interim terrestrial solar cell calibration and measurement procedures. The revisions made to the interim testing procedures are described. The calibration of reference cells and the design of their holders are covered. Considerations include view angle and optical and thermal matching. Atmospheric factors which affect the calibration and performance of solar cells are discussed. The most critical atmospheric parameter appears to be water vapor. Techniques for matching reference cells to cells or arrays under test are described. Data showing errors in performance under artificial sunlight simulators due to mismatch of reference and test cells are presented. Finally, measurement procedures and data transformations needed to obtain the performance of solar cells and arrays in outdoor natural sunlight are described.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-73788 , E-9353 , ERDA/NASA-1022/77/20 , 1977 Photovoltaics Solar Energy Conf.; Sep 27, 1977 - Sep 30, 1977; Luxembourg
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 63
    facet.materialart.
    Unknown
    Solar Power Satellite Concept Evaluation. Volume 1: Summary (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A program was developed to determine the technical feasiblity of a satellite solar power station. The space construction, maintenance, and transport systems are discussed. Environmental factors, in addition to manufacturing, natural resources, and energy were considered. Cost estimates and alternative systems are outlined.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-74820 , JSC-12973-VOL-1
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 64
    facet.materialart.
    Unknown
    Heat exchanger-ingot casting/slicing process. Silicon sheet growth development for the large area silicon sheet task of the low cost silicon solar array project (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-153104 , ERDA/JPL-954373-77/6 , QPR-6
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 65
    facet.materialart.
    Unknown
    Improved black nickel coatings for flat plate solar collectors (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A new black nickel formula was developed which had a solar absorptance of 0.92 and an infrared emittance (at 100 C) of less than 0.10 after 14 days at 38 C and 95 percent relative humidity. The electroplating bath and conditions were changed to obtain the more stable coating configuration. The effect of bath composition, temperature, pH, and plating current density and time on the coating composition, optical properties and durability were investigated.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Seminar on Optics in solar energy utilization II; Aug 24, 1976 - Aug 25, 1976; San Diego, CA
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 66
    facet.materialart.
    Unknown
    Redox Bulk Energy Storage System Study, Volume 1 (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Opportunities were found for electrochemical energy storage devices in the U.S. electric utility industry. Application requirements for these devices were defined, including techno-economic factors. A new device, the Redox storage battery was analyzed. The Redox battery features a decoupling of energy storage and power conversion functions. General computer methods were developed to simulate Redox system operations. These studies showed that the Redox system is potentially attractive if certain performance goals can be achieved. Pathways for reducing the cost of the Redox system were identified.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-135206-VOL-1 , EXXON/GRU.1BH-77-VOL-1
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 67
    facet.materialart.
    Unknown
    Redox Bulk Energy Storage System Study, Volume 2 (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: For abstract, see N77-33608.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-135206-VOL-2 , EXXON/GRU.2BH.77-VOL-2
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 68
    facet.materialart.
    Unknown
    Energy requirement for the production of silicon solar arrays (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Photovoltaics is subject of an extensive technology assessment in terms of its net energy potential as an alternate energy source. Reduction of quartzite pebbles, refinement, crystal growth, cell processing and panel building are evaluated for energy expenditure compared to direct, indirect, and overhead energies.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-153409 , ERDA/JPL-954606-77/1 , SX/111/2Q , QR-2
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 69
    facet.materialart.
    Unknown
    High efficiency thermionic converter studies (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Research in thermionic energy conversion technology is reported. The objectives were to produce converters suitable for use in out of core space reactors, radioisotope generators, and solar satellites. The development of emitter electrodes that operate at low cesium pressure, stable low work function collector electrodes, and more efficient means of space charge neutralization were investigated to improve thermionic converter performance. Potential improvements in collector properties were noted with evaporated thin film barium oxide coatings. Experiments with cesium carbonate suggest this substance may provide optimum combinations of cesium and oxygen for thermionic conversion.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-135263 , TE-4233-152-77
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 70
    facet.materialart.
    Unknown
    Evaluation of selected chemical processes for production of low-cost silicon, phase 2 (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Potential designs for an integrated fluidized-bed reactor/zinc vaporizer/SiCl4 preheater unit are being considered and heat-transfer calculations have been initiated on versions of the zinc vaporizer section. Estimates of the cost of the silicon prepared in the experimental facility have been made for projected capacities of 25, 50, 75, and 100 metric ton of silicon. A 35 percent saving is obtained in going from 25 metric ton/year to the 50 metric ton/year level. This analysis, coupled with the recognition that use of two reactors in the 50 metric ton/year version allows for continued operation (at reduced capacity) with one reactor shut down, has resulted in a recommendation for adoption of an experimental facility capacity of 50 metric ton/year or greater. At this stage, the change to a larger size facility would not increase the design costs appreciably. In the experimental support program, the effects of seed bed particle size and depth were studied, and operation of the miniplant with a new zinc vaporizer was initiated, revealing the need for modification of the latter.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-153907 , QPR-7 , ERDA/JPL-754339-77/7
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 71
    facet.materialart.
    Unknown
    Development of Low Cost, High Energy-Per-Unit-Area Solar Cell Modules (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Work on the development of low cost, high energy per unit area solar cell modules was conducted. Hexagonal solar cell and module efficiencies, module packing ratio, and solar cell design calculations were made. The cell grid structure and interconnection pattern was designed and the module substrates were fabricated for the three modules to be used. It was demonstrated that surface macrostructures significantly improve cell power output and photovoltaic energy conversion efficiency.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-153977 , ERDA/JPL-954605-77/2 , QR-2
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 72
    facet.materialart.
    Unknown
    Semiconductor grade, solar silicon purification project (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The potential for a three step SiF2 polymer transport purification process was examined. The process involves reacting low cost mg silicon with SiF4 to yield SiF2 gas which is condensed to form polymeric (SiF2)x. The polymer is then heated above 400 C to yield Si, SiF4 and higher Si sub n F sub 2n+2 homologues. This report presents and discusses continuing progress on (1) observations on (SiF2)x polymer formation and depolymerization on the small coil, (2) mass balance studies, (3) partial pressures of SiF2 and SiF4, (4) AlF3 mass spectral studies, and (5) material analysis studies.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-153406 , ERDA/JPL-954442-77/3 , REPT-2257/6 , QTR-6
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 73
    facet.materialart.
    Unknown
    Dynamic blade loading in the ERDA/NASA 100 kW and 200 kW wind turbines (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Dynamic blade loads, including aerodynamic, gravitational, and inertial effects, are presented for two large horizontal-axis wind turbines: the ERDA-NASA 100 kW Mod-0 and 200 kw Mod-0A wind power systems. Calculated and measured loads are compared for an experimental Mod-0 machine in operation. Predicted blade loads are also given for the higher power Mod-0A wind turbine now being assembled for operation as part of a municipal power plant. Two major structural modifications have been made to the Mod-0 wind turbine for the purpose of reducing blade loads. A stairway within the truss tower was removed to reduce the impulsive aerodynamic loading caused by the tower wake on the downwind rotor blades. Also, the torsional stiffness of the yaw drive mechanism connecting the turbine nacelle to the tower was doubled to reduce rotor-tower interaction loads. Measured reductions in load obtained by means of these two modifications equaled or exceeded predictions.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-73711 , ERDA/NASA-1004/77/2 , E-9242 , Natl. Conf. of the Am. Wind Energy Assoc.; May 11, 1977 - May 14, 1977; Boulder, CO; United States
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 74
    facet.materialart.
    Unknown
    Solar heating and cooling technical data and systems analysis (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The research activities described herein were concentrated on the areas of economics, heating and cooling systems, architectural design, materials characteristics, climatic conditions, educational information packages, and evaluation of solar energy systems and components.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-150305
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 75
    facet.materialart.
    Unknown
    Magnetic stirling cycles: A new application for magnetic materials (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The elements of the cycle are summarized. The basic advantages include high entropy density in the magnetic material, completely reversible processes, convenient control of the entropy by the applied field, the feature that heat transfer is possible during all processes, and the ability of the ideal cycle to attain Carnot efficiency. The mean field theory is used to predict the entropy of a ferromagnet in an applied field and also the isothermal entropy change and isentropic temperature change caused by applying a field. The results for isentropic temperature change are compared with experimental data on Gd. Coarse mixtures of ferromagnetic materials with different Curie points are proposed to modify the path of the cycle in the T-S diagram in order to improve the efficiency or to increase the specific power.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-X-73676 , E-9196 , Intern. Magnetics Conf.; Jun 06, 1977 - Jun 10, 1977; Los Angeles
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 76
    facet.materialart.
    Unknown
    The NASA thermionic-conversion (TEC-ART) program (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The current emphasis is on out-of-core thermionic conversion (TEC). The additional degrees of freedom offer new potentialities, but high-temperature material effects determine the level and lifetime of TEC performance: New electrodes not only raise power outputs but also maintain them regardless of emitter-vapor deposition on collectors. In addition, effective electrodes serve compatibly with hot-shell alloys. Space TEC withstands external and internal high-temperature vaporization problems, and terrestrial TEC tolerates hot corrosive atmospheres outside and near-vacuum inside. Finally, reduction of losses between converter electrodes is essential even though rather demanding geometries appear to be required for some modes of enhanced operation.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-X-73610 , E-9093 , Plasma Sci. Conf.; May 23, 1977 - May 25, 1977; Troy, NY; United States
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 77
    facet.materialart.
    Unknown
    Synchronization of the ERDA-NASA 100 LkW wind turbine generator with large utility networks (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The synchronizing of a wind turbine generator against an infinite bus under random conditions is studied. With a digital computer, complete solutions for rotor speed, generator power angle, electromagnetic torque, wind turbine torque, wind turbine blade pitch angle, and armature current are obtained and presented by graphs.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-X-73613 , E-9096 , Control of Power Systems Conf.; Mar 14, 1977 - Mar 16, 1977; College Station, TX; United States
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 78
    facet.materialart.
    Unknown
    Fuel cell on-site integrated energy system parametric analysis of a residential complex (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The use of phosphoric acid fuel cell powerplant to provide all the electricity required by an 81-unit garden apartment complex is studied. Byproduct heat is recovered and provides some of the heat required by the complex. The onsite integrated energy system contains energy conversion equipment including combinations of compression and absorption chillers, heat pumps, electric resistance heaters, and thermal storage. The annual fuel requirement for several onsite integrated energy systems as well as the fuel cell breakeven cost for one specific system were calculated. It is found that electrical efficiency cannot be traded off against thermal efficiency without paying a penalty in system efficiency.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: U.S. Department of Energy, Fuel Cell Workshop; Nov 14, 1977 - Nov 17, 1977; Sarasota, FL
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 79
    facet.materialart.
    Unknown
    Comparison of the solar concentrating properties of truncated hexagonal, pyramidal and circular cones (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The concentrating properties of specularly reflecting pyramids, hexagons and circular cones are examined. The concentration factor is determined as a function of the coefficient of reflection and the shape and orientation of the incident sunlight. Reflector designs allowing multiple reflections for both normal and oblique incidence are considered.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Optics applied to solar energy conversion; Seminar; Aug 23, 1977 - Aug 24, 1977; San Diego, CA
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 80
    facet.materialart.
    Unknown
    Factors affecting the open-circuit voltage and electrode kinetics of some iron/titanium/redox flow cells (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The effect of acid concentration on the performance of the iron-titanium redox flow cell was studied. When the acidity was increased, open-circuit voltages decreased on the titanium side but load voltages increased due to decreased polarization. The best load voltage occurs when there is high acidity on the titanium side coupled with low acidity on the iron side, but such cells show voltage losses with repeated cycling because of the diffusion of acid through the membrane. No membrane tested has been found capable of maintaining the differences in acidity. Chelating agents show some promise in reducing polarization at the Ti electrode and thus improving energy efficiency.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Symposium on Electrode Materials and Processes for Energy Conversion and Storage; May 09, 1977 - May 12, 1977; Philadelphia, PA
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 81
    facet.materialart.
    Unknown
    Characterization of n-type semiconducting indium phosphide photoelectrodes Stabilization to photoanodic dissolution in aqueous solutions of telluride and ditelluride ions (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Symposium on Electrode Materials and Processes for Energy Conversion and Storage; May 09, 1977 - May 12, 1977; Philadelphia, PA
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 82
    facet.materialart.
    Unknown
    Determination of potential solar power sites in the United States based upon satellite cloud observations (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The use of cloud images in the visual spectrum from the SMS/GOES geostationary satellites to determine the hourly distribution of sunshine on a mesoscale in the continental United States excluding Alaska is presented. Cloud coverage and density as a function of time of day and season are evaluated through the use of digital data processing techniques. Low density cirrus clouds are less detrimental to solar energy collection than other types; and clouds in the morning and evening are less detrimental than those during midday hours of maximum insolation. Seasonal geographic distributions of cloud cover/sunshine are converted to langleys of solar radiation received at the earth's surface through relationships developed from long term measurements at six widely distributed stations.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-159944
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 83
    facet.materialart.
    Unknown
    Heat exchanger-ingot casting/slicing process: Silicon sheet growth development for the large area silicon sheet task of the low cost silicon solar array project (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-155717 , ERDA/JPL-954373-77/3 , QPR-8
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 84
    facet.materialart.
    Unknown
    Solar power satellite status report (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The development of a solar power satellite program is considered. It is suggested that the solar power satellite is an engineering rather than a science program - that is, that no scientific breakthroughs are required before initiating the project. Available technology is examined, and several key questions are discussed: how efficient is microwave transfer of energy; how feasible is construction in space; and will the advantages of continuous insolation compensate for the costs of building a solar power plant in synchronous orbit 23,000 miles above the earth.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Conference on Solar Energy in the Southwest ''77; Aug 27, 1977 - Aug 28, 1977; Dallas, TX
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 85
    facet.materialart.
    Unknown
    ERDA/NASA 100 kilowatt mod-o wind turbine operations and performance (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The ERDA/NASA 100 kW Mod-0 wind turbine is operating at the NASA Plum Brook Station near Sandusky, Ohio. The operation of the wind turbine has been fully demonstrated and includes start-up, synchronization to the utility network, blade pitch control for control of power and speed, and shut-down. Also, fully automatic operation has been demonstrated by use of a remote control panel, 50 miles from the site, similar to what a utility dispatcher might use. The operation systems and experience with the wind turbine loads, electrical power and aerodynamic performance obtained from testing are described.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-73825 , ERDA/NASA-1028/77/9 , Conf. on Wind Energy Conversion Systems; Sep 19, 1977 - Sep 21, 1977; Washington, DC; United States
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 86
    facet.materialart.
    Unknown
    Black chrome on commercially electroplated tin as a solar selecting coating (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The reflectance properties of black chrome electroplated on commercially electroplated tin were measured for various black chrome plating times for both the solar and infrared spectrum. The values of absorptance and emittance were calculated from the measured reflectance values. The results indicate that the optimum combination of the highest absorptance in the solar region and the lowest emittance in the infrared of the black chrome plated on commercially electroplated tin is obtained for a black chrome plating time of between one and two minutes.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-73799 , ERDA/NASA-1060/77/1 , E-9375 , Concentrating Collector Conf.; Sep 26, 1977 - Sep 28, 1977; Atlanta
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 87
    facet.materialart.
    Unknown
    Experimental data and theoretical analysis of an operating 100 kW wind turbine (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Part of the cooperative effort between NASA and ERDA has been the design and the erection of an experimental wind turbine by the NASA-Lewis Research Center. This 100 kW turbine, designated the Mod-O, is located at the NASA Plum Brook site near Sandusky, Ohio. Experimental test data have been correlated with analyses of turbine loads and complete system behavior of the 100 kW Mod-O wind turbine generator over a broad range of steady state conditions, as well as during transient conditions. The deficit in the ambient wind field due to the upwind tower turbine support structure was found to be very significant in exciting higher harmonic loads associated with the flapping response of the blade in bending.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Intersociety Energy Conversion Engineering Conference; Aug 28, 1977 - Sep 02, 1977; Washington, DC
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 88
    facet.materialart.
    Unknown
    Advanced thermionic converter developments with microwave external pumping (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: This work reports ion generation in a cesium thermionic converter as part of advanced-model thermionic converter development research. A microwave with frequency in the range between 1-2 GHz is used to externally pump a thermionic converter as part of our effort in the verification of Lam's theory. It is found that the motive peak as predicted in the theory disappears whenever microwave power is used to excite the cesium plasma of the converter. The electron temperature is effectively heated by the microwave and the experimental data agrees with theory in the low-power output region.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Intersociety Energy Conversion Engineering Conference; Aug 28, 1977 - Sep 02, 1977; Washington, DC
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 89
    facet.materialart.
    Unknown
    Status of research on advanced thermionic converters (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: It is shown that it is possible to controllably and continuously elevate the electron temperature in the plasmatron thermionic energy converter from the emitter temperature to the maintenance electron temperature for the diode arc mode. This ability and the apparent validity of an elementary analytical model of the plasma should make possible the optimization and evaluation of operation under strong ionization conditions for which the plasma resistance should be acceptably low. Measurement of the vacuum space charge arising from the emission from a surface in cesium vapor indicates the presence of a substantial negative ion emission current. Apparatus has been constructed for identifying and directly measuring the flux of positive, negative and neutral species emitted from an electrode surface in a cesium vapor diode. The primary purpose of the investigation is to determine the influence of negative ion emission on the effective work function of thermionic converter electrodes. Initial data indicate the presence of H(-), Cs(-) and possibly C(-) and CH(-).
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Intersociety Energy Conversion Engineering Conference; Aug 28, 1977 - Sep 02, 1977; Washington, DC
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 90
    facet.materialart.
    Unknown
    Comparative assessment of orbital and terrestrial central power plants (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Recent studies of the space power system (SPS) are integrated into a total social cost framework developed for terrestrial central electric power systems. Total social costs include the projection of commercial economics to the time frame of interest as well as the federal research, development and demonstration (RD&D) costs, the health impacts, the resources required, the environmental impacts and other social costs. The SPS system is limited to transporting all materials from the earth's surface to geosynchronous orbit. Only silicon photovoltaic is considered as the SPS energy conversion technique. Costs and impacts of the LWR are considered as a reference for nuclear systems, and the low BTU coal gasification with combined cycle gas and steam turbines is considered as a reference for a fossil central electric plant. The ground solar systems considered are solar thermal using the central receiver approach with thermal storage, and solar photovoltaic using the silicon cell with battery storage.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Intersociety Energy Conversion Engineering Conference; Aug 28, 1977 - Sep 02, 1977; Washington, DC
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 91
    facet.materialart.
    Unknown
    Dynamic modeling and sensitivity analysis of solar thermal energy conversion systems (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Since the energy input to solar thermal conversion systems is both time variant and probabilistic, it is unlikely that simple steady-state methods for estimating lifetime performance will provide satisfactory results. The work described here uses dynamic modeling to begin identifying what must be known about input radiation and system dynamic characteristics to estimate performance reliably. Daily operation of two conceptual solar energy systems was simulated under varying operating strategies with time-dependent radiation intensity ranging from smooth input of several magnitudes to input of constant total energy whose intensity oscillated with periods from 1/4 hour to 6 hours. Integrated daily system output and efficiency were functions of both level and dynamic characteristics of insolation. Sensitivity of output to changes in total input was greater than one.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Intersociety Energy Conversion Engineering Conference; Aug 28, 1977 - Sep 02, 1977; Washington, DC
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 92
    facet.materialart.
    Unknown
    The NASA thermionic-conversion /TEC-ART/ program (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The NASA program for applied research and technology in thermionic energy conversion is described, and the approaches used to obtain the goal of reduced interelectrode losses, improved emitters, and improved collectors are indicated. The current emphasis on out-of-core thermionics allows materials and designs previously prohibited by in-core nucleonics and geometrics. Since high-temperature material effects are important for several components, tungsten, 25%-rhenium technology is a subject of research. Emitter-vaporization, collector-deposition effects were studied, and improvements in metallic-fluid heat pipes are considered. Some required characteristics of electrodes are examined.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Conference on Plasma Science; May 23, 1977 - May 25, 1977; Troy, NY
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 93
    facet.materialart.
    Unknown
    Silicon solar photovoltaic power stations (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Modular design of components and arrays, cost estimates for modules and support structures, and cost/performance analysis of a central solar photovoltaic power plant are discussed. Costs of collector/reflector arrays are judged the dominant element in the total capital investment. High-concentration solar tracking arrays are recommended as the most economic means for producing solar photovoltaic energy when solar cells costs are high ($500 per kW generated). Capital costs for power conditioning subsystem components are itemized and system busbar energy costs are discussed at length.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: AIAA PAPER 77-1021 , Conference on New options in energy technology; Aug 02, 1977 - Aug 04, 1977; San Francisco, CA
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 94
    facet.materialart.
    Unknown
    Thermal storage for electric utilities (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Applications of the thermal energy storage (TES) principle (storage of sensible heat or latent heat, or heat storage in reversible chemical reactions) in power systems are evaluated. Load leveling behind the meter, load following at conventional thermal power plants, solar thermal power generation, and waste heat utilization are the principal TES applications considered. Specific TES examples discussed include: storage heaters for electric-resistance space heating, air conditioning TES in the form of chilled water or eutectic salt baths, hot water TES, and trans-seasonal storage in heated water in confined aquifers.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: AIAA PAPER 77-1009 , Conference on New options in energy technology; Aug 02, 1977 - Aug 04, 1977; San Francisco, CA
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 95
    facet.materialart.
    Unknown
    Future trends in electrical energy generation economics in the United States (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Developments related to the economics of coal-fired systems in the U.S. are mainly considered. The historical background of the U.S. electric generation industry is examined and the U.S. electrical generation characteristics in the year 1975 are considered. It is pointed out that coal-fired power plants are presently the largest source of electrical energy generation in the U.S. Questions concerning the availability and quality of coal are investigated. Currently there are plans for converting some 50 large oil and gas-fired generating plants to coal, and it is expected that coal will be the fuel used in almost all fossil-fired base load additions to generating capacity. Aspects of advanced energy conversion from coal are discussed, taking into account the performance and economic potential of the energy conversion systems.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: World Electrotechnical Congress; Jun 21, 1977 - Jun 25, 1977; Moscow; USSR
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 96
    facet.materialart.
    Unknown
    Efficiency and cost advantages of an advanced-technology nuclear electrolytic hydrogen-energy production facility (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The concept of an advanced-technology (viz., 1985 technology) nuclear-electrolytic water electrolysis facility was assessed for hydrogen production cost and efficiency expectations. The facility integrates (1) a high-temperature gas-cooled nuclear reactor (HTGR) operating a binary work cycle, (2) direct-current (d-c) electricity generation via acyclic generators, and (3) high-current-density, high-pressure electrolyzers using a solid polymer electrolyte (SPE). All subsystems are close-coupled and optimally interfaced for hydrogen production alone (i.e., without separate production of electrical power). Pipeline-pressure hydrogen and oxygen are produced at 6900 kPa (1000 psi). We found that this advanced facility would produce hydrogen at costs that were approximately half those associated with contemporary-technology nuclear electrolysis: $5.36 versus $10.86/million Btu, respectively. The nuclear-heat-to-hydrogen-energy conversion efficiency for the advanced system was estimated as 43%, versus 25% for the contemporary system.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Symposium on Synthetic fuels processing: Comparative economics; Apr 04, 1976 - Apr 09, 1976; New York, NY
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 97
    facet.materialart.
    Unknown
    The sun-tracking control of solar collectors using high-performance step motors (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Sun-tracking solar energy-focusing devices involving a central receiver, thermionic conversion, or a distributed solar thermal collector system are described. The Perkins solar collector uses a fixed focal point about which an 18 m-diameter parabolic dish moves on tracks. The elevation axis also moves on a circular track. A microprocessor manipulates sun sensor information and sun ephemeris data to ensure correct placement. Stepper motors are digital devices which provide direct interface with digital electronics and a wide dynamic range, and could easily be associated with the microprocessors. Design philosophy, performance criteria, wind load analysis, and control system requirements are also discussed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Annual Symposium on Incremental Motion Control Systems and Devices; May 24, 1977 - May 27, 1977; Urbana, IL
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 98
    facet.materialart.
    Unknown
    Heat pipe reactors for space power applications (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A family of heat pipe reactors design concepts has been developed to provide heat to a variety of electrical conversion systems. Three power plants are described that span the power range 1-500 kWe and operate in the temperature range 1200-1700 K. The reactors are fast, compact, heat-pipe cooled, high-temperature nuclear reactors fueled with fully enriched refractory fuels, UC-ZrC or UO2. Each fuel element is cooled by an axially located molybdenum heat pipe containing either sodium or lithium vapor. Virtues of the reactor designs are the avoidance of single-point failure mechanisms, the relatively high operating temperature, and the expected long lifetimes of the fuel element components.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: AIAA PAPER 77-491 , Conference on the Future of Aerospace Power Systems; Mar 01, 1977 - Mar 03, 1977; St. Louis, MO
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 99
    facet.materialart.
    Unknown
    ATS-6 solar cell experiment/improvement (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: ATS 6 solar cell flight experiment data through 2 years of synchronous orbit operation are presented. Comparisons are made of the performances of the 13 different types of solar cell/cover configurations, including new cover processes and materials, and the COMSAT violet cell. These performances are also compared to the performances of the LES 6 solar cell experiment, the ATS 6 main solar arrays, and the Hughes Aircraft Company solar arrays, and to laboratory spectrum electron irradiations. It was found that the cells of the ATS 6 experiment generally performed as expected through 6 to 9 months in orbit, but that at 2 years they were more severely degraded than expected.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-152609
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 100
    facet.materialart.
    Unknown
    NASA thermionic-conversion program (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Technological processes in out-of-core thermionic energy conversion are described. The emphasis was on high temperature electrode materials and system engineering of converter geometries to produce practical power densities.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-X-73644 , E-9150 , Intersoc. Energy Conversion Eng. Conf.; Aug 28, 1977 - Sep 02, 1977; Washington, DC; United States
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...