Abstract A program has been completed to measure the flow rate of hydrogen at pressures up to 10 MPa through commercially manufactured porous metal flow restrictors. Such flow restrictors offer substantially greater resistance to contamination induced plugging or changes in flow when compared with conventional orifices and capillary tubing. The primary goal of the program was to find the appropriate flow restrictor to serve as the Joule-Thomson expander in the cryostat for the UCSB continuous operation hydrogen sorption cooler. This was accomplished by finding a porous plug with the desired pressure drop and mass flow combination at the expected restrictor inlet temperature of about 35 Kelvin. The second goal of the program was to develop the means to accurately predict hydrogen mass flow at cryogenic temperatures from the flow rating given by the manufacturer. This ability will greatly reduce the amount of time and effort required in finding the correct flow restrictor for future sorption cryo-coolers. A summary of the cryostat design and test procedure is given. Also discussed are three designs for flow restrictors that were tested and how the final design was chosen. Finally, flow test results are presented and the predictability of cryogenic high pressure hydrogen flow rates from the manufacturer’s rating and room temperature hydrogen flow tests is considered.


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    Titel :

    Characterization of Porous Metal Flow Restrictors for Use as the J-T Expander in Hydrogen Sorption Cryocoolers


    Beteiligte:
    Levy, Alan R. (Autor:in) / Wade, Lawrence A. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2002-01-01


    Format / Umfang :

    8 pages




    Medientyp :

    Aufsatz/Kapitel (Buch)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





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