Experiments on two-phase flow of R1234ze(E), R134a and R32 in horizontal mini-channels

Daisuke Jige, Yuta Komiya, Hongcheng Zhang, Chieko Kondou, Shigeru Koyama

    Research output: Contribution to conferencePaperpeer-review

    Abstract

    In this study, the adiabatic pressure drop and flow boiling heat transfer characteristics of R1234ze(E), R134a and R32 in horizontal multi-port mini-channels are experimentally investigated. Experiments were carried out with aluminum rectangular-channel tubes of 0.43 mm and 1.31 mm in average hydraulic diameters, as well as with a circular-channel tube of 0.52 mm in the hydraulic diameter, at a saturation temperature of 288 K in mass velocity range from 100 to 400 kg m-2s-1 and heat flux range from 5 to 20 kW m-2. The existing correlations and experimentally determined heat transfer coefficient satisfactorily agreed for the rectangular channel of 1.31 mm and the circular channel of 0.52mm, however deviates for the rectangular tube of 0.43 mm. This comparison result indicates the significant effect of heat transfer contribution by the thin-liquid-film evaporation.

    Original languageEnglish
    Publication statusPublished - 2014
    Event7th Asian Conference on Refrigeration and Air Conditioning, ACRA 2014 - Jeju Island, Korea, Republic of
    Duration: May 18 2014May 21 2014

    Other

    Other7th Asian Conference on Refrigeration and Air Conditioning, ACRA 2014
    CountryKorea, Republic of
    CityJeju Island
    Period5/18/145/21/14

    All Science Journal Classification (ASJC) codes

    • Electrical and Electronic Engineering
    • Condensed Matter Physics
    • Control and Systems Engineering
    • Mechanical Engineering

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