In this study, the heat transfer coefficient (HTC) and pressure drop of the new low global warming potential refrigerant mixture R1123/R32 (40/60 mass%) in a 6.0 mm OD horizontal microfin tube during condensation at 40 °C and evaporation at 10 °C are experimentally quantified. The data are then compared to the component R32. Both the condensation HTC and pressure drop of R1123/R32 (40/60 mass%) are somewhat lower than those of R32. Similarly, the pressure drop of R1123/R32 during the evaporation process at 10 °C is somewhat lower than that of R32. However, the evaporation HTC is comparable to that of R32. The lower surface tension of R1123/R32 can enhance the nucleate boiling and compensate the heat transfer degradation due to the volatility difference.
雑誌名
Science and Technology for the Built Environment
巻
25
号
10
ページ
1281 - 1291
発行年
2019-08-08
出版者
Taylor & Francis
ISSN
23744731
EISSN
2374474X
DOI
10.1080/23744731.2019.1642096
権利
c 2019 Taylor & Francis. This is an Accepted Manuscript of an article published by Taylor & Francis in Science and Technology for the Built Environment on 08 Aug 2019, available online: http://www.tandfonline.com/10.1080/23744731.2019.1642096.
著者版フラグ
author
引用
Science and Technology for the Built Environment, 25(10), pp. 1281-1291; 2019
Heat Transfer and Pressure Drop of R1123/R32 (40/60 mass%) Flow in Horizontal Microfin Tubes during Condensation and Evaporation
STBE25_1281.pdf
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