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    • Leachman, Jacob
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    • Mechanical and Materials Engineering, School of
    • Faculty - Mechanical and Materials Engineering
    • Leachman, Jacob
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    Revised Standardized Equation of State for Hydrogen Gas Densities for Fuel Consumption Applications

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    Revised_Standardized_Equation_proceeding (344.7Kb)
    Date
    2008
    Author
    Leachman, Jacob
    Lemmon, Eric W.
    Huber, Marcia L.
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    Abstract
    An equation for the density of hydrogen gas has been developed that agrees with the current standard to within 0.01% from 220 K to 1000 K with pressures up to 70 MPa, to within 0.01% from 255 K to 1000 K with pressures to 120 MPa, and to within 0.1% from 200 K to 1000 K up to 200 MPa. The equation is a truncated virial-type equation based on pressure and temperature dependent terms. The density uncertainty for this equation is the same as the current standard and is estimated to be 0.04% (combined uncertainty with a coverage factor of 2) between 250 K and 450 K for all pressures, and 0.1% for lower temperatures. Comparisons are presented with experimental data and with the full equation of state.
    URI
    http://hdl.handle.net/2376/5653
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    • Leachman, Jacob