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  • 1
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    Energy consumption program: A computer model simulating energy loads in buildings (1978)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The JPL energy consumption computer program developed as a useful tool in the on-going building modification studies in the DSN energy conservation project is described. The program simulates building heating and cooling loads and computes thermal and electric energy consumption and cost. The accuracy of computations are not sacrificed, however, since the results lie within + or - 10 percent margin compared to those read from energy meters. The program is carefully structured to reduce both user's time and running cost by asking minimum information from the user and reducing many internal time-consuming computational loops. Many unique features were added to handle two-level electronics control rooms not found in any other program.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: The Deep Space Network; p 288-289
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Comparison of two total energy systems for a diesel power generation plant (1979)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The capabilities and limitations, as well as the associated costs for two total energy systems for a diesel power generation plant are compared. Both systems utilize waste heat from engine cooling water and waste heat from exhaust gases. Pressurized water heat recovery system is simple in nature and requires no engine modifications, but operates at lower temperature ranges. On the other hand, a two-phase ebullient system operates the engine at constant temperature, provides higher temperature water or steam to the load, but is more expensive.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: The Deep Space Network; p 89-93
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    The updated algorithm of the Energy Consumption Program (ECP): A computer model simulating heating and cooling energy loads in buildings (1979)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The energy Comsumption Computer Program was developed to simulate building heating and cooling loads and compute thermal and electric energy consumption and cost. This article reports on the new additional algorithms and modifications made in an effort to widen the areas of application. The program structure was rewritten accordingly to refine and advance the building model and to further reduce the processing time and cost. The program is noted for its very low cost and ease of use compared to other available codes. The accuracy of computations is not sacrificed however, since the results are expected to lie within + or - 10% of actual energy meter readings.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: The Deep Space Network; p 107-115
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    JPL Energy Consumption Program (ECP) documentation: A computer model simulating heating, cooling and energy loads in buildings (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The engineering manual provides a complete companion documentation about the structure of the main program and subroutines, the preparation of input data, the interpretation of output results, access and use of the program, and the detailed description of all the analytic, logical expressions and flow charts used in computations and program structure. A numerical example is provided and solved completely to show the sequence of computations followed. The program is carefully structured to reduce both user's time and costs without sacrificing accuracy. The user would expect a cost of CPU time of approximately $5.00 per building zone excluding printing costs. The accuracy, on the other hand, measured by deviation of simulated consumption from watt-hour meter readings, was found by many simulation tests not to exceed + or - 10 percent margin.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157599 , JPL-PUB-78-76
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Solar-powered jet refrigerator (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Design criteria are easily evaluated by tool. Thermodynamic analysis of solar-powered vapor-jet refrigerator combines important performance parameters in nomogram that assist design of practical system. Projected coefficients of performance for difference ejector configurations, working fluids, and other design variables are easily obtained from nomogram.
    Keywords: MECHANICS
    Type: NPO-14550 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 263
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Analysis of building heating and cooling (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Energy Conservation Program (ECP) gives design engineer methodology and easy-to-use computer program for simulating hourly thermal characteristics over full year for individually characterized zones within building. Inexpensive system can be used to develop thermal model of building to aid selection of most suitable and economical heating and cooling system for building
    Keywords: PHYSICAL SCIENCES
    Type: NPO-14683 , NASA Tech Briefs (ISSN 0145-319X); 4; 1; P. 63
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    A thermodynamic analysis of a solar-powered jet refrigeration system (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The article describes and analyzes a method of using solar energy to drive a jet refrigeration system. A new technique is presented in the form of a performance nomogram combining the energy and momentum equations to determine the performance characteristics. A numerical example, using water as the working fluid, is given to illustrate the nomogram procedure. The resulting coefficient of performance was found comparable with other refrigeration systems such as the solar-absorption system or the solar-Rankine turbocompressor system.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Solar energy: International progress; Jun 16, 1978 - Jun 22, 1978; Cairo; Egypt
    Format: text
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    NASA TECHNICAL REPORTS
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