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  • 1
    Publication Date: 2016-06-07
    Description: Extensive geological and geophysical surveys were carried out at the Marysville geothermal area during 1973 and 1974. The area has high heat flow (up to microcalories per square centimeter-second, a negative gravity anomaly, high electrical resistivity, low seismic ground noise, and nearby microseismic activity. Significant magnetic and infrared anomalies are not associated with the geothermal area. The geothermal anomaly occupies the axial portion of a dome in Precambrian sedimentary rocks intruded by Cretaceous and Cenozoic granitic rocks. The results from a 2.4-km-deep test well indicate that the cause of the geothermal anomaly is hydrothermal convection in a Cenozoic intrusive. A maximum temperature of 95 C was measured at a depth of 500 m in the test well.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: JPL Proc. of the Conf. on Res. for the Develop. of Geothermal Energy Resources; p 98-110
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  • 2
    Publication Date: 2006-05-07
    Description: Existing applications of NASA contributions to disciplines such as combustion engineering, mechanical engineering, materials science, quality assurance and computer control are outlined to illustrate how space technology is used in the electric power industry. Corporate strategies to acquire relevant space technology are described.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Chamber of Commerce Proc. of the 1st 1974 Technol. Transfer Conf.; p 89-96
    Format: text
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  • 3
    Publication Date: 2016-06-07
    Description: The Federal government's current plans for participation in the geothermal field appear to affect four major areas of interest: (1) resources exploration and assessment, (2) resources utilization projects, (3) advanced research and technology, and (4) environmental, legal, and institutional research. Private industry is also actively involved in these same areas of interest. Because of lack of coordination and communication between the private and public sector, it appears that there will be considerable duplication of effort, and, in some cases, serious conflict. It is also likely that this lack of coordination and communication may result in lack of effort in some key areas. Close coordination and communication between government and industry may resolve some of the major problems that are clearly evident.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: JPL Proc. of the Conf. on Res. for the Develop. of Geothermal Energy Resources; p 331-334
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  • 4
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    In:  CASI
    Publication Date: 2016-06-07
    Description: A key technical problem in the exploitation of hot water geothermal energy resources is down-well pumping to inhibit mineral precipitation, improve thermal efficiency, and enhance flow. A novel approach to this problem involves the use of a small fraction of the thermal energy of the well water to boil and super-heat a clean feedwater flow in a down-hole exchanger adjacent to the pump. This steam powers a high-speed turbine-driven pump. The exhaust steam is brought to the surface through an exhaust pipe, condensed, and recirculated. A small fraction of the high-pressure clean feedwater is diverted to lubricate the turbine pump bearings and prevent leakage of brine into the turbine-pump unit. A project demonstrating the feasibility of this approach by means of both laboratory and down-well tests is discussed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: JPL Proc. of the Conf. on Res. for the Develop. of Geothermal Energy Resources; p 281-291
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  • 5
    Publication Date: 2016-06-07
    Description: Drilling the first geothermal well in Montana presented many challenges, not only in securing materials and planning strategies for drilling the wildcat well but also in addressing the environmental, legal, and institutional issues raised by the request for permission to explore a resource which lacked legal definition. The Marysville Geothermal Project was to investigate a dry hot rock heat anomaly. The well was drilled to a total depth of 6790 feet and many fractured water bearing zones were encountered below 1800 feet.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: JPL Proc. of the Conf. on Res. for the Develop. of Geothermal Energy Resources; p 213-224
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  • 6
    Publication Date: 2016-06-07
    Description: A plan to develop the geothermal resources of the Imperial Valley of California is presented. The plan consists of development policies and includes text and graphics setting forth the objectives, principles, standards, and proposals. The plan allows developers to know the goals of the surrounding community and provides a method for decision making to be used by county representatives. A summary impact statement for the geothermal development aspects is provided.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: JPL Proc. of the Conf. on Res. for the Develop. of Geothermal Energy Resources; p 160-163
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  • 7
    Publication Date: 2019-06-27
    Description: An evaluation intended to determine the potential suitability and probable efficacy of a group of separator materials for use in nickel-cadmium (Ni-Cd) satellite batteries was carried out. These results were obtained using test procedures established in an earlier evaluation of other separator materials, some of which were used in experimental battery cells subjected to simulated use conditions. The properties that appear to be most important are: high electrolyte absorptivity, good electrolyte retention, low specific resistivity, rapid wettability and low resistance to air permeation. Wicking characteristics and wet-out time seem to be more important with respect to the initial filling of the battery with the electrolyte.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-143504 , COM-75-10618/7 , NBSIR-74-541
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  • 8
    Publication Date: 2019-06-27
    Description: A solar heating and cooling system is described, which was installed in a simulated home at Marshall Space Flight Center. Performance data are provided for the checkout and initial operational phase for key subsystems and for the total system. Valuable information was obtained with regard to operation of a solar cooling system during the first summer of operation. Areas where improvements and modifications are required to optimize such a system are discussed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-X-64924
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  • 9
    Publication Date: 2019-06-27
    Description: The Dunes anomaly is a water-dominated geothermal system in the alluvium of the Salton Trough, lacking any surface expression. It was discovered by shallow-temperature gradient measurements. A 612-meter-deep test well encountered several temperature-gradient reversals, with a maximum of 105 C at 114 meters. The program involves surface geophysics, including electrical, gravity, and seismic methods, down-hole geophysics and petrophysics of core samples, isotopic and chemical studies of water samples, and petrological and geochemical studies of the cores and cuttings. The aim is (1) to determine the source and temperature history of the brines, (2) to understand the interaction between the brines and rocks, and (3) to determine the areal extent, nature, origin, and history of the geothermal system. These studies are designed to provide better definition of exploration targets for hidden geothermal anomalies and to contribute to improved techniques of exploration and resource assessment.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: IGPP-UCR-74-31 , JPL Proc. of the Conf. on Res. for the Develop. of Geothermal Energy Resources; p 45-71
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  • 10
    Publication Date: 2019-07-13
    Description: The transient response of a single cell of a typical phase change material type thermal capacitor has been modeled using numerical conductive heat transfer techniques. The cell consists of a base plate, an insulated top, and two vertical walls (fins) forming a two-dimensional cavity filled with a phase change material. Both explicit and implicit numerical formulations are outlined. A mixed explicit-implicit scheme which treats the fin implicity while treating the phase change material explicitly is discussed. A band algorithmic scheme is used to reduce computer storage requirements for the implicit approach while retaining a relatively fine grid. All formulations are presented in dimensionless form thereby enabling application to geometrically similar problems. Typical parametric results are graphically presented for the case of melting with constant heat input to the base of the cell.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: ASME PAPER 74-WA/HT-21 , American Society of Mechanical Engineers, Winter Annual Meeting; Nov 17, 1974 - Nov 22, 1974; New York, NY
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