The forced circulation cooling system with rectangular mini-channels for the inverter of electric vehicles

Jiwon Yeo, Daisuke Jige, Seiya Yamashita, Shigeru Koyama

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    In this study, the flow boiling in an evaporator with narrow rectangular mini-channels has been investigated experimentally to develop a forced circulation cooling system with high performance. The test evaporator has 11 parallel channels (channel width × depth × length: 1.0 mm × 3.5 mm × 34 mm), and new refrigerant, R1234ze(E), is used as working fluid. The experiment is conducted in the following ranges: the input heat flux is controlled from 150 to 2000 kW/m2 depending on thermodynamic equilibrium quality at the outlet of the evaporator, the mass velocity of working fluid ranges from 72 to 288 kg/(m2· s), the degree of subcooling of the working fluid are 5, 10 and 15 K, and the pressure of the working fluid is kept 767 kPa, at which the saturation temperature is 40 °C. The pressure drop in the evaporator is calculated using Jige-Koyama correlation, and it agrees with the experimental one with less than 30 % of deviation. Then, the working fluid temperature, thermodynamic equilibrium quality etc. are estimated based on the calculated pressure drop. As the effective heat flux increases, the thermal resistances of boiling and system are dramatically decreased up to 800 kW/m2 and then kept constants before the dryout. And the temperature of heating block surface is kept below 90 °C up to about 1600 kW/m2 of the effective heat flux in the mass velocity 288 kg/(m2· s). This result indicates the possibility of the forced circulation cooling system applying the flow boiling of R1234ze(E) in narrow rectangular channels.

    Original languageEnglish
    Title of host publicationProceedings of the 15th International Heat Transfer Conference, IHTC 2014
    PublisherBegell House Inc.
    Publication statusPublished - 2014
    Event15th International Heat Transfer Conference, IHTC 2014 - Kyoto, Japan
    Duration: Aug 10 2014Aug 15 2014

    Other

    Other15th International Heat Transfer Conference, IHTC 2014
    CountryJapan
    CityKyoto
    Period8/10/148/15/14

    Fingerprint

    working fluids
    cooling systems
    Electric vehicles
    Cooling systems
    evaporators
    Evaporators
    vehicles
    Fluids
    boiling
    Boiling liquids
    Heat flux
    heat flux
    thermodynamic equilibrium
    pressure drop
    Pressure drop
    Thermodynamics
    refrigerants
    Refrigerants
    thermal resistance
    outlets

    All Science Journal Classification (ASJC) codes

    • Mechanical Engineering
    • Condensed Matter Physics

    Cite this

    Yeo, J., Jige, D., Yamashita, S., & Koyama, S. (2014). The forced circulation cooling system with rectangular mini-channels for the inverter of electric vehicles. In Proceedings of the 15th International Heat Transfer Conference, IHTC 2014 Begell House Inc..

    The forced circulation cooling system with rectangular mini-channels for the inverter of electric vehicles. / Yeo, Jiwon; Jige, Daisuke; Yamashita, Seiya; Koyama, Shigeru.

    Proceedings of the 15th International Heat Transfer Conference, IHTC 2014. Begell House Inc., 2014.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Yeo, J, Jige, D, Yamashita, S & Koyama, S 2014, The forced circulation cooling system with rectangular mini-channels for the inverter of electric vehicles. in Proceedings of the 15th International Heat Transfer Conference, IHTC 2014. Begell House Inc., 15th International Heat Transfer Conference, IHTC 2014, Kyoto, Japan, 8/10/14.
    Yeo J, Jige D, Yamashita S, Koyama S. The forced circulation cooling system with rectangular mini-channels for the inverter of electric vehicles. In Proceedings of the 15th International Heat Transfer Conference, IHTC 2014. Begell House Inc. 2014
    Yeo, Jiwon ; Jige, Daisuke ; Yamashita, Seiya ; Koyama, Shigeru. / The forced circulation cooling system with rectangular mini-channels for the inverter of electric vehicles. Proceedings of the 15th International Heat Transfer Conference, IHTC 2014. Begell House Inc., 2014.
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