Liquefaction is one approach for increasing the density of natural gas and hydrogen to make them practical motor vehicle fuels. Productive on-vehicle utilisation of the 'cold energy' invested in these fuels by the liquefaction process is investigated. This 'cold energy' enthalpy change is approximately 1.7% and 3.2% of the lower heating value of LNG and LH2, respectively. Direct utilisation for truck cargo cooling and engine charge densification has been demonstrated. Indirect utilisation involves power generation to drive vehicle auxiliary equipment. The maximum power is limited by the thermodynamic availability, which can exceed the 'cold energy' enthalpy change. A system to drive an LNG vehicle high-pressure fuel pump without engine attachments or parasitic power consumption is described. Ethylene in a Rankine cycle receives heat from the engine coolant, directly drives the reciprocating pump, and rejects heat to the LNG. Bench test fixture results demonstrate approximately 0.45 hp per lbm/min of equivalent LNG flow using a simple but inefficient full-admission cycle.


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    Titel :

    Liquefaction energy recovery in LNG and LH2 fueled vehicles


    Weitere Titelangaben:

    Rückgewinnung der Verflüssigungsenergie in flüssiggas- und flüssigwasserstoffbetriebenen Fahrzeugen


    Beteiligte:
    Powars, C.A. (Autor:in) / Derbidge, T.C. (Autor:in)


    Erscheinungsdatum :

    2000


    Format / Umfang :

    9 Seiten, 12 Bilder, 1 Tabelle, 14 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Liquefaction energy recovery in LNG and LH2 fueled vehicles

    Powars,C.A. / Derbidge,T.C. / Research Partnership.US | Kraftfahrwesen | 2000


    Liquefaction Energy Recovery in LNG and LH2 Fueled Vehicles

    Powars, Charles A. / Derbidge, T. Craig | SAE Technical Papers | 2000


    2000-01-3082 Liquefaction Energy Recovery in LNG and LH~2 Fueled Vehicles

    Powars, C. A. / Derbidge, T. C. / Society of Automotive Engineers | British Library Conference Proceedings | 2000


    Hydrogen-fueled vehicles

    Lipman,T.E. / DeLucchi,M.A. / Univ.of California at Davis,Inst.of Transportation Studies,US | Kraftfahrwesen | 1996


    Propane Fueled Heavy-Duty Vehicles

    Kytö, Matti / Nylund, Nils-Olof | SAE Technical Papers | 1993