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  • 1
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    The dilemma of future electric power demand (1976)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Dim prospects are held out for continued exponential growth rates in the generation and use of electric power worldwide and in many local areas, extrapolating from current trends and common projections. While acknowledging the unique advantages of electric power use, the article points out the 30% level of efficiency in conversion of other forms of energy to electrical energy, with huge volumes of wasted energy plus thermal pollution. Even growth at a fixed rate is found problematical, with future needs exhausting water and land resources and fossil fuels in time. Alleviation of the situation by shifting much of the load to still unproven technologies is considered cautiously
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Energy Quarterly; 6; Apr. 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Site-Specific Research Conducted in Support of the Salton Sea Solar Pond Project - FY 1982 Report (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The design and operation of a salt-gradient solar pond power plant at the Salton Sea presents problems not encountered at small research ponds that were built in the United States. The specific characteristics of the Salton Sea site and the desire to construct the pond using the local clay as a sealant represent major deviations from previous solar pond experience. The site-specific research in support of the plant design is described. The research activity included validation of the spectrophotometric light transmission measurement technique, a search for options for clarifying the turbid and colored water of the Salton Sea, development of water clarification specifications in terms common to industry practice, quantification of gas production from microbiological reactions in the ground, a determination of the combined effects of temperature and salinity on the permeation of the local clays, and a preliminary evaluation of material corrosion.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-174182 , JPL-PUB-84-68 , NAS 1.26:174182 , DOE/SF-11592/1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Solar pond power plant feasibility study for Davis, California (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The feasibility of constructing a solar pond power plant at Davis, California was studied. Site visits, weather data compilation, soil and water analyses, conceptual system design and analyses, a material and equipment market survey, conceptual site layout, and a preliminary cost estimate were studied. It was concluded that a solar pond power plant is technically feasible, but economically unattractive. The relatively small scale of the proposed plant and the high cost of importing salt resulted in a disproportionately high capital investment with respect to the annual energy production capacity of the plant. Cycle optimization and increased plant size would increase the economical attractiveness of the proposed concept.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-168819 , JPL-PUB-82-16 , JPL-5107-4 , NAS 1.26:168819
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Comparative performance of solar thermal power generation concepts (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A performance comparison is made between the central receiver system (power tower) and a distributed system using either dishes or troughs and lines to transport fluids to the power station. These systems were analyzed at a rated capacity of 30 MW of thermal energy delivered in the form of superheated steam at 538 C (1000 F) and 68 atm (1000 psia), using consistent weather data, collector surface waviness, pointing error, and electric conversion efficiency. The comparisons include technical considerations for component requirements, land utilization, and annual thermal energy collection rates. The relative merits of different representative systems are dependent upon the overall conversion as expressed in the form of performance factors in this paper. These factors are essentially indices of the relative performance effectiveness for different concepts based upon unit collector area. These performance factors enable further economic tradeoff studies of systems to be made by comparing them with projected production costs for these systems.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Conference on Intersociety Energy Conversion Engineering; Sep 12, 1976 - Sep 17, 1976; State Line, NV
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Simplified calculation of solar flux distribution on the side wall of cylindrical cavity solar receivers (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A simple solar flux calculation algorithm for a cylindrical cavity type solar receiver has been developed and implemented on an IBM PC-AT. Using cone optics, the contour error method is utilized to handle the slope error of a paraboloidal concentrator. The flux distribution on the side wall is calculated by integration of the energy incident from cones emanating from all the differential elements on the concentrator. The calculations are done for any set of dimensions and properties of the receiver and the concentrator, and account for any spillover on the aperture plate. The results of this algorithm compared excellently with those predicted by more complicated programs. Because of the utilization of axial symmetry and overall simplification, it is extremely fast. It can be esily extended to other axisymmetric receiver geometries.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Annual ASME Solar Engineering Conference; Apr 02, 1989 - Apr 05, 1989; San Diego, CA; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    The development of an advanced generic solar dynamic heat receiver thermal model (1988)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: An advanced generic solar dynamic heat receiver thermal model under development which can analyze both orbital transient and orbital average conditions is discussed. This model can be used to study advanced receiver concepts, evaluate receiver concepts under development, analyze receiver thermal characteristics under various operational conditions, and evaluate solar dynamic system thermal performances in various orbit conditions. The model and the basic considerations that led to its creation are described, and results based on a set of baseline orbit, configuration, and operational conditions are presented to demonstrate the working of the receiver model.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Annual ASME Solar Energy Conference; Apr 10, 1988 - Apr 14, 1988; Denver, CO; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Solar Stirling power generation - Systems analysis and preliminary tests (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The feasibility of an electric power generation system utilizing a sun-tracking parabolic concentrator and a Stirling engine/linear alternator is being evaluated. Performance predictions and cost analysis of a proposed large distributed system are discussed. Design details and preliminary test results are presented for a 9.5 ft diameter parabolic dish at the Jet Propulsion Laboratory (Caltech) Table Mountain Test Facility. Low temperature calorimetric measurements were conducted to evaluate the concentrator performance, and a helium flow system is being used to test the solar receiver at anticipated working fluid temperatures (up to 650 or 1200 C) to evaluate the receiver thermal performance. The receiver body is designed to adapt to a free-piston Stirling engine which powers a linear alternator assembly for direct electric power generation. During the next phase of the program, experiments with an engine and receiver integrated into the concentrator assembly are planned.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: International Solar Energy Society; Jun 06, 1977 - Jun 10, 1977; Orlando, FL
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Solar receiver performance of point focusing collector system (1978)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: The solar receiver performance of cavity receivers and external receivers used in dispersed solar power systems was evaluated for the temperature range 300-1300 C. Several parameters of receiver and concentrator are examined. It was found that cavity receivers are generally more efficient than external receivers, especially at high temperatures which require a large heat transfer area. The effects of variation in the ratio of receiver area to aperture area are considered.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: ASME PAPER 78-WA/SOL-5 , American Society of Mechanical Engineers, Winter Annual Meeting; Dec 10, 1978 - Dec 15, 1978; San Francisco, CA
    Format: text
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    NASA TECHNICAL REPORTS
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