An experimental study of refrigerant distribution in an automotive condenser

C. H. Kim, N. H. Kim*

*この研究の対応する著者

研究成果: Article査読

1 被引用数 (Scopus)

抄録

The literature shows almost no prior investigations on two-phase flow distribution in a parallel flow condenser. In the present study, R-134a flow distribution tests were conducted in the test section, which simulated an actual parallel flow condenser having 58 mini-channel tubes and 4 passes. R-134a gas was supplied at 25 °C superheat, which exited the test section at 5 °C subcooled condition. At inlet of the header, the flow distribution was relatively uniform, except at topmost channels. At the second and third pass, the flow distribution was also relatively uniform except at topmost and bottommost channels. At the exit of each pass, two-phase jets were issued from the tubes of the previous pass, which hit opposite wall of the header, and flowed downward forming a liquid film. At the bottom of the header, the remnant liquid, which was not supplied into the next pass, formed a liquid pool. The thermal degradation due to flow mal-distribution was not significant (0.1–2.82%), which increased as mass flux decreased. Flow distribution correlations were developed to predict the fraction of liquid or gas taken off by downstream channel as a function of gas Reynolds number and channel inlet vapor quality.

本文言語English
論文番号116259
ジャーナルApplied Thermal Engineering
184
DOI
出版ステータスPublished - 2021 2月 5
外部発表はい

ASJC Scopus subject areas

  • エネルギー工学および電力技術
  • 産業および生産工学

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