A method of operating a heat transfer system includes circulating a heat transfer fluid through a heat transfer loop in fluid communication with an electrical system, and obtaining real-time measurements of a fluid characteristic of the heat transfer fluid. A dimensional effectiveness factor (DEF fluid) of the heat transfer fluid is calculated based on fluid characteristics and selected pumps and selected primary flow regimes within the heat transfer circuit, and a dimensional effectiveness factor (DEF reference) of the reference fluid is calculated for selected pumps and selected primary flow regimes within the heat transfer circuit. A normalized effectiveness factor, NEF, fluid of the heat transfer fluid is thus obtained, thereby obtaining a condition of the heat transfer fluid. If the NEF fluid is below a predetermined threshold, the condition is deemed to deteriorate, and if the NEF fluid is above the predetermined threshold, the condition is deemed to be feasible.

    一种操作传热系统的方法包括使传热流体循环通过与电气系统流体连通的传热回路,和获得传热流体的流体特性的实时测量值。基于流体特性和传热回路内选定的泵和选定的主导流态计算传热流体的量纲有效性因子(DEF流体),以及对于传热回路内选定的泵和选定的主导流态计算参考流体的量纲有效性因子(DEF参考)。由此获得传热流体的归一化有效性因子NEF流体,由此获得传热流体的状况。如果NEF流体低于预定阈值,则认为状况恶化,以及如果NEF流体高于预定阈值,则认为状况是可行的。


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    Title :

    Condition monitoring of heat transfer fluids for electrical systems


    Additional title:

    电气系统用传热流体的状况监测


    Contributors:

    Publication date :

    2023-01-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / C09K Materialien für Anwendungen, soweit nicht anderweitig vorgesehen , MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR / 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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