A Study on flow boiling heat transfer in non-uniformly heated parallel mini-channels by numerical analysis

Kizuku Kurose, Takuya Kawasuso, Kazushi Miyata, Yoshinori Hamamoto, Hideo Mori

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

抄録

A novel heat exchanger using parallel refrigerant mini-channels has recently been developed to improve the performance of air conditioning systems. In the evaporator, due to unequal heat load among the parallel channels, boiling flow tends to be unevenly distributed. Since this phenomenon sometimes causes deterioration of heat exchange performance, it is important to clarify the characteristics of boiling heat transfer under the unequally heated condition. In the present study, a simulation model which predicts flow boiling heat transfer performance of a refrigerant heated unequally among parallel mini-channels has been developed, and simulation for two-parallel channels were carried out. Based on the calculation results, the effect of the inequality in wall temperatures between the channels on the heat transfer rate to the refrigerant was discussed. The channel mean heat transfer rate decreased with expanding the difference of wall temperatures between the channels and the deterioration rate became significant at a high mass flow velocity.

本文言語英語
ホスト出版物のタイトルICR 2019 - 25th IIR International Congress of Refrigeration
編集者Vasile Minea
出版社International Institute of Refrigeration
ページ2431-2438
ページ数8
ISBN(電子版)9782362150357
DOI
出版ステータス出版済み - 2019
イベント25th IIR International Congress of Refrigeration, ICR 2019 - Montreal, カナダ
継続期間: 8月 24 20198月 30 2019

出版物シリーズ

名前Refrigeration Science and Technology
2019-August
ISSN(印刷版)0151-1637

会議

会議25th IIR International Congress of Refrigeration, ICR 2019
国/地域カナダ
CityMontreal
Period8/24/198/30/19

!!!All Science Journal Classification (ASJC) codes

  • 制御およびシステム工学
  • 電子工学および電気工学
  • 機械工学
  • 凝縮系物理学

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