The development of peformance prediction methods for an automotive CO 2 air conditioning cycle

Masafumi Katsuta, Takahiro Oshiro, Akira Kaneko, Sangchul Bae, Shunji Komatsu, Yohei Ohno

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


    In previous researches, we have been focusing on the performance of the each element heat transfer and hydraulic performance of refrigeration cycle. Experimental investigations have been repeated several times and, finally, we have substantial data base including the effect of lubricant oil. Moreover, the mal-distribution of two-phase in an evaporator can be also predicted from the experimental data base. Under these circumstances, this study is intended to effectively put the construction of an automotive CO2 air conditioning system into practical design use through the simulation using the above-mentioned data base. This paper describes the refrigeration cycle performance prediction of each element (e.g. an evaporator, a gas-cooler, and so on) by a simulation using substantial data base and various available correlations proposed by us and several other researchers. In the performance prediction model of heat exchangers, local heat transfer and flow characteristics are considered and in addition, the effects of lubricant oil on heat transfer and pressure drop are duly considered. The comparison is also made between simulation results and bench test results using a real automotive air conditioning system. Finally, the developed simulation method can predict the cooling ability successfully within ±5%. By incorporating the lubricant oil effect, the simulation results are improved to ±5% and ±15% for the cooling ability and pressure drop respectively.

    Original languageEnglish
    Title of host publication2010 14th International Heat Transfer Conference, IHTC 14
    Number of pages6
    Publication statusPublished - 2010
    Event2010 14th International Heat Transfer Conference, IHTC 14 - Washington, DC
    Duration: 2010 Aug 82010 Aug 13


    Other2010 14th International Heat Transfer Conference, IHTC 14
    CityWashington, DC

    ASJC Scopus subject areas

    • Fluid Flow and Transfer Processes


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