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  • 1975-1979  (10)
  • 1
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    Isolation, crystallization and preliminary crystallographic data of aspartate aminotransferase from chicken heart mitochondria (1977)
    Elsevier
    Details
    Publication Date: 1977-09-01
    Print ISSN: 0022-2836
    Electronic ISSN: 1089-8638
    Topics: Biology
    Published by Elsevier
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    PAPER CURRENT
  • 2
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    UNITED STATES RAILWAY TRAFFIC: AN UPDATE (1978)
    Taylor & Francis
    Details
    Publication Date: 1978-08-01
    Print ISSN: 0033-0124
    Electronic ISSN: 1467-9272
    Topics: Geography
    Published by Taylor & Francis
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    PAPER CURRENT
  • 3
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    Evaluation of rotor-bearing system dynamic response to unbalance (1979)
    In:  CASI
    Details
    Publication Date: 2006-07-02
    Description: The vibration environment within air conditioner rotating machinery referred to as an air cycle machine (ACM) was investigated to effectively increase ACM reliability. To assist in the selection of design changes which would result in improved ACM performance, various design modifications were incorporated into a baseline ACM configuration. For each design change, testing was conducted with the best balance achieveable (baseline) and with various degrees of unbalance. Relationships between unbalance (within the context of design changes) and the parameters associated with design goals were established. The results of rotor dynamics tests used to establish these relationships are presented.
    Keywords: MECHANICAL ENGINEERING
    Type: Shock and Vibration Inform. Center The Shock and Vibration Bull., Pt. 3; p 41-53
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    REDOX - electrochemical energy storage (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Rechargeable system, which operates at relatively low temperatures from room temperature to about 353 K, consists of analyte and catholyte storage tanks connected to flow cell.
    Keywords: MATERIALS
    Type: LEW-12220 , NASA Tech Briefs (ISSN 0145-319X); 1; 1; P. 78
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Electrically rechargeable REDOX flow cell (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A bulk energy storage system is designed with an electrically rechargeable reduction-oxidation (REDOX) cell divided into two compartments by a membrane, each compartment containing an electrode. An anode fluid is directed through the first compartment at the same time that a cathode fluid is directed through the second compartment. Means are provided for circulating the anode and cathode fluids, and the electrodes are connected to an intermittent or non-continuous electrical source, which when operating, supplies current to a load as well as to the cell to recharge it. Ancillary circuitry is provided for disconnecting the intermittent source from the cell at prescribed times and for circulating the anode and cathode fluids according to desired parameters and conditions.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Recent advances in redox flow cell storage systems (1979)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Several features which were conceived and incorporated into complete redox systems that greatly enhanced its ability to be kept in proper charge balance, to be capable of internal voltage regulation, and in general be treated as a true multicell electrochemical system rather than an assembly of single cells that were wired together, were discussed. The technology status as it relates to the two application areas of solar photovoltaic/wind and distributed energy storage for electric utility applications was addressed. The cost and life advantages of redox systems were also covered.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-79186 , DOE/NASA/1002-79/4 , E-053 , Intersoc. Energy Conversion Eng. Conf.; Aug 05, 1979 - Aug 10, 1979; Boston, MA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Redox flow cell energy storage systems (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The redox flow cell energy storage system being developed by NASA for use in remote power systems and distributed storage installations for electric utilities is presented. The system under consideration is an electrochemical storage device which utilizes the oxidation and reduction of two fully soluble redox couples (acidified chloride solutions of chromium and iron) as active electrode materials separated by a highly selective ion exchange membrane. The reactants are contained in large storage tanks and pumped through a stack of redox flow cells where the electrochemical reactions take place at porous carbon felt electrodes. Redox equipment has allowed the incorporation of state of charge readout, stack voltage control and system capacity maintenance (rebalance) devices to regulate cells in a stack jointly. A 200 W, 12 V system with a capacity of about 400 Wh has been constructed, and a 2 kW, 10kWh system is planned.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: AIAA PAPER 79-0989 , American Institute of Aeronautics and Astronautics, Terrestrial Energy Systems Conference; Jun 04, 1979 - Jun 06, 1979; Orlando, FL
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Electrochemical cell for rebalancing REDOX flow system (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An electrically rechargeable REDOX cell or battery system including one of more rebalancing cells is described. Each rebalancing cell is divided into two chambers by an ion permeable membrane. The first chamber is fed with gaseous hydrogen and a cathode fluid which is circulated through the cathode chamber of the REDOX cell is also passed through the second chamber of the rebalancing cell. Electrochemical reactions take place on the surface of insert electrodes in the first and second chambers to rebalance the electrochemical capacity of the anode and cathode fluids of the REDOX system.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Redox flow cell energy storage systems (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: NASA-Redox systems are electrochemical storage devices that use two fully soluble Redox couples, anode and cathode fluids, as active electrode materials separated by a highly selective ion exchange membrane. The reactants are contained in large storage tanks and pumped through a stack of Redox flow cells where the electrochemical reactions (reduction and oxidation) take place at porous carbon felt electrodes. A string or stack of these power producing cells is connected in series in a bipolar manner. Redox energy storage systems promise to be inexpensive and possess many features that provide for flexible design, long life, high reliability and minimal operation and maintenance costs. These features include independent sizing of power and storage capacity requirements and inclusion within the cell stack of a cell that monitors the state of charge of the system as a whole, and a rebalance cell which permits continuous correction to be made for minor side reactions that would tend to result in the anode fluid and cathode fluids becoming electrochemically out of balance. These system features are described and discussed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-79143 , DOE/NASA/1002-79/3 , E-9996
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Recent advances in Redox flow cell storage systems (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Attention is given to recent data pertaining to flow cell storage system-related features as well as the state of Redox membrane technology. In addition, the state of the technology as it relates to the two application areas of storage for photovoltaic/wind and distributed energy storage for electrical utility applications is addressed. Also covered are the cost and life advantages of Redox systems as well as a discussion of such cells as the open circuit voltage cell, the rebalance cell, and the trim cell. Finally, it is concluded that the main thrust of membrane development will be to reduce the interaction between the chloro complex of iron in the ferric state since this is the major factor in membrane area resistivity.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Intersociety Energy Conversion Engineering Conference; Aug 05, 1979 - Aug 10, 1979; Boston, MA
    Format: text
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    NASA TECHNICAL REPORTS
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