A cooling system 10 for a fuel cell 12 onboard a vehicle, e.g. an aircraft, comprises a fluid circuit with a coolant channel 13 in contact with the fuel cell to absorb heat from the fuel cell, a heat exchanger 20 comprising an extension of the coolant channel and an airflow channel 48, a pump 24 for pressurizing and circulating the coolant through the system, and a throttling valve 26 for controlling pressure on the coolant as it circulates through the system. The coolant comprises a phase-change material and has a boiling point at pressure that is below the fuel cell operating temperature. The system also includes a controller for controlling operation of the pump and the throttling valve to at least partially evaporate the coolant. The coolant can be partially or completely evaporated so that it exits contact with the fuel cell as a two-phase mixture or as a super-heated vapour. The cooling system may also include a coolant buffer tank 32 for holding liquid coolant 18. Because this cooling system and method employs the latent heat of evaporation of a two-phase coolant, it reduces mass and parasitic power requirements of the cooling system.


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    Titel :

    Pumped two-phase fuel cell cooling


    Beteiligte:
    MATTHEW LEGG (Autor:in)

    Erscheinungsdatum :

    16.10.2024


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY



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