Abstract The formation of frost causes a decrease in the heat exchanger performance because of increased thermal resistance. In this study, the performance of a refrigeration system in a refrigerator truck with frost growth was determined and the performance characteristics were analyzed considering the indoor and outdoor temperature, outdoor air velocity, and compressor rotating speed. As a result, under frost growth conditions, refrigeration capacity was decreased by 30.4% when the operating time passed by 3 hours which had a blocking ratio of 40.1%. In addition, the mass flow rate was decreased, but the pressure ratio was increased with an increase in frost thickness, leading to a decrease in the refrigeration capacity and COP. The maximum system COP was found at a compressor rotating speed of 1500 rpm: 2.30 and 1.86 for a blocking ratio of 0% and 40.1%, respectively. It gradually decreased over 1500 rpm.


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    Title :

    Simulation study on refrigeration performance under frost condition in a R404A refrigerator truck type


    Contributors:
    Kim, S. H. (author) / Kim, T. J. (author) / Shin, Y. C. (author) / Cho, H. H. (author)

    Published in:

    Publication date :

    2015-03-24


    Size :

    11 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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