ABSTRACT

The nucleated pool boiling heat transfer experiments for plain and five different reentrant cavity copper tube surfaces in saturated R134a, R32, and R600a have been carried out. The experiments are carried for heat fluxes ranging from 6.92 to 51.71 kW/m² at saturation temperatures of 7°C and 10°C. A significant increase in the boiling heat transfer coefficient has been observed for all tube surfaces with the reentrant cavity. The nucleate boiling heat transfer coefficient for R134a, R32, and R600a is 1.2–2.8 times more than that for plain tube surfaces. A correlation for reentrant cavity surfaces has also been developed.

中文翻译：

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使用凹腔表面增强 R134a、R32 和 R600a 的池沸腾传热

摘要

对饱和 R134a、R32 和 R600a 中的普通和五种不同凹腔铜管表面进行了核池沸腾传热实验。在 7°C 和 10°C 的饱和温度下，针对从 6.92 到 51.71 kW/m ^{2的热通量进行实验。}对于具有凹腔的所有管表面，已经观察到沸腾传热系数的显着增加。R134a、R32 和 R600a 的泡核沸腾传热系数是普通管表面的 1.2-2.8 倍。还开发了重入腔表面的相关性。