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  • ENERGY PRODUCTION AND CONVERSION  (7)
  • EARTH RESOURCES AND REMOTE SENSING  (3)
  • 1980-1984  (10)
  • 1
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    Efficient computerized model for dynamic analysis of energy conversion systems (1983)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: In searching for the optimum parameters that minimize the total life cycle cost of an energy conversion system, various combinations of components are examined and the resulting system performance and associated economics are studied. The systems performance and economics simulation computer program (SPECS) was developed to fill this need. The program simulates the fluid flow, thermal, and electrical characteristics of a system of components on a quasi-steady state basis for a variety of energy conversion systems. A unique approach is used in which the set of characteristic equations is solved by the Newton-Raphson technique. This approach eliminates the tedious iterative loops which are found in comparable programs such as TRNSYS or SOLTES-1. Several efficient features were also incorporated such as the centralized control and energy management scheme, and analogous treatment of energy flow in electrical and mechanical components, and the modeling of components of similar fundamental characteristics using generic subroutines. Initial tests indicate that this model can be used effectively with a relatively small number of time steps and low computer cost.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: The Telecommun. and Data Acquisition Rept.; p 161-176
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    A simplified solar cell array modelling program (1982)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: As part of the energy conversion/self sufficiency efforts of DSN engineering, it was necessary to have a simplified computer model of a solar photovoltaic (PV) system. This article describes the analysis and simplifications employed in the development of a PV cell array computer model. The analysis of the incident solar radiation, steady state cell temperature and the current-voltage characteristics of a cell array are discussed. A sample cell array was modelled and the results are presented.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: The Telecommun. and Data Acquisition Rept.; p 167-185
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Potential availability of diesel waste heat at Echo Deep Space Station (DSS 12) (1982)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Energy consumption at the Goldstone Echo Deep Space Station (DSS 12) is predicted and quantified for a future station configuration which will involve implementation of proposed energy conservation modifications. Cogeneration by the utilization of diesel waste-heat to satisfy site heating and cooling requirements of the station is discussed. Scenarios involving expanded use of on-site diesel generators are presented.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: The Telecommun. and Data Acquisition Progr. J.; p 166-182
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Multiple and variable speed electrical generator systems for large wind turbines (1982)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A cost effective method to achieve increased wind turbine generator energy conversion and other operational benefits through variable speed operation is presented. Earlier studies of multiple and variable speed generators in wind turbines were extended for evaluation in the context of a specific large sized conceptual design. System design and simulation have defined the costs and performance benefits which can be expected from both two speed and variable speed configurations.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA. Lewis Research Center Large Horizontal-Axis Wind Turbines; p 125-136
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    MOD-OA 200 kW wind turbine generator engineeringing (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Engineering drawings and the detailed mechanical and electrical design of a horizontal-axis wind turbine designed for DOE at the NASA Lewis Research Center and installed in Clayton, New Mexico are discussed. The drawings show the hub, pitch change mechanism, drive train, nacelle equipment, yaw drive system, tower, foundation, electrical power systems, and the control and safety systems.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-165129 , DOE/NASA/0163-3 , AESD-TME-3053
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    MOD-0A 200 kW wind turbine generator design and analysis report (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The design, analysis, and initial performance of the MOD-OA 200 kW wind turbine generator at Clayton, NM is documented. The MOD-OA was designed and built to obtain operation and performance data and experience in utility environments. The project requirements, approach, system description, design requirements, design, analysis, system tests, installation, safety considerations, failure modes and effects analysis, data acquisition, and initial performance for the wind turbine are discussed. The design and analysis of the rotor, drive train, nacelle equipment, yaw drive mechanism and brake, tower, foundation, electricl system, and control systems are presented. The rotor includes the blades, hub, and pitch change mechanism. The drive train includes the low speed shaft, speed increaser, high speed shaft, and rotor brake. The electrical system includes the generator, switchgear, transformer, and utility connection. The control systems are the blade pitch, yaw, and generator control, and the safety system. Manual, automatic, and remote control are discussed. Systems analyses on dynamic loads and fatigue are presented.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-165128 , DOE/NASA/0163-2 , AESD-TME-3052
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Studies of high latitude current systems using MAGSAT vector data (1981)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The magnetic disturbance fields caused by global external current systems are considered with particular emphasis on improving the understanding of the physical processes which control high latitude current systems. Following processing the MAGSAT data were routinely plotted in the Universal Time (UT) format as well as in a polar plot format. The H'D'U' coordinate system, was adopted as the standard for representing the MAGSAT residual magnetic field vectors. A data file was generated and the TPOLAR computer code was developed to determine from the orbital elements, the time, latitude, and MLT of the extremum latitude of each transpolar segment of orbit. The precision of the vector data set from MAGSAT prompted an extended exploratory phase for data analysis procedures, modeling techniques and phenomenology.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E82-10188 , NASA-CR-168616 , NAS 1.26:168616 , PR-3
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Study and simulation results for video landmark acquisition and tracking technology (Vilat-2) (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The results of several investigations and hardware developments which supported new technology for Earth feature recognition and classification are described. Data analysis techniques and procedures were developed for processing the Feature Identification and Location Experiment (FILE) data. This experiment was flown in November 1981, on the second Shuttle flight and a second instrument, designed for aircraft flights, was flown over the United States in 1981. Ground tests were performed to provide the basis for designing a more advanced version (four spectral bands) of the FILE which would be capable of classifying clouds and snow (and possibly ice) as distinct features, in addition to the features classified in the Shuttle experiment (two spectral bands). The Shuttle instrument classifies water, bare land, vegetation, and clouds/snow/ice (grouped).
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-166066 , NAS 1.26:166066
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    The MOD-OA 200 kilowatt wind turbine generator design and analysis report (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The project requirements, approach, system description, design requirements, design, analysis, system tests, installation safety considerations, failure modes and effects analysis, data acquisition, and initial performance for the MOD-OA 200 kw wind turbine generator are discussed. The components, the rotor, driven train, nacelle equipment, yaw drive mechanism and brake, tower, foundation, electrical system, and control systems are presented. The rotor includes the blades, hub and pitch change mechanism. The drive train includes the low speed shaft, speed increaser, high speed shaft, and rotor brake. The electrical system includes the generator, switchgear, transformer, and utility connection. The control systems are the blade pitch, yaw, and generator control, and the safety system. Manual, automatic, and remote control and Dynamic loads and fatigue are analyzed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-165127 , DOE/NASA/0163-1 , NAS 1.26:165127 , AESD-TME-3051
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Studies of high latitude current systems using Magsat vector data (1980)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Disturbance fields caused by global external current systems are analyzed in order to gain an improved understanding of the phydical processes which control high latitude current systems and to increase the confidence level in the identification of internal field levels. The basic approach is to: (1) categorize the vector data by those physical parameters important for investigation of external current systems; (2) map the disturbances for appropriate conditions; (3) model the currents which might cause the mapped disturbances; and (4) correlate results with data from other sources. It is concluded that the Magsat data set appears to have remarkably high precision and quality and should permit major advances to be made in modeling current distribution at high latitudes in the ionosphere and magnetosphere.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E81-10085 , NASA-CR-163785 , PR-1
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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