Flow boiling heat transfer characteristics of R-22 and R-134a in 0.5, 1.5 and 3.0 mm tubes

Kwang Il Choi, A. S. Pamitran, Jong Taek Oh*, Hoo Kyu Oh, Kiyoshi Saito

*この研究の対応する著者

研究成果: Conference contribution

抄録

An experimental study of R-22 and R-134a two-phase vaporization in horizontal minichannel was reported. In order to obtain the local heat transfer coefficients, the test was ran under heat flux range of 10 to 40 kW m -2, mass flux range of 200 to 600 kg m-2 s-1, saturation temperature range of 5 to 10°C, and quality up to 1.0. The test section, which was made of stainless steel tube and heated uniformly by applying an electric current to the tube directly, has inner tube diameters of 0.5, 1.5 and 3.0 mm, and lengths of 0.33 and 2.0 m. The effects on heat transfer coefficient of mass flux, heat flux and inner tube diameter were presented. The experimental heat transfer coefficients were compared with the predictions using existing heat transfer coefficient correlations. A new boiling heat transfer coefficient correlation based on the superposition model, with considering the laminar flow, was developed.

本文言語English
ホスト出版物のタイトル4th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2009
出版社National Taipei University of Technology
ページ81-86
ページ数6
ISBN(印刷版)9868509610, 9789868509610
出版ステータスPublished - 2009
イベント4th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2009 - Taipei, Taiwan, Province of China
継続期間: 2009 5 202009 5 22

出版物シリーズ

名前4th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2009

Conference

Conference4th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2009
国/地域Taiwan, Province of China
CityTaipei
Period09/5/2009/5/22

ASJC Scopus subject areas

  • 化学工学(その他)

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