核沸腾
热力学
材料科学
沸腾
热流密度
制冷剂
传热系数
传热
机械
蒸发器
蒸发
强迫对流
临界热流密度
对流换热
物理
热交换器
作者
Hiroshi Takamatsu,Satoru Momoki,Tetsu Fujii
标识
DOI:10.1016/0017-9310(93)90016-y
摘要
An experimental study is reported on the boiling heat transfer of HFC134a, HCFC22, CFC114 and CFC12 flowing inside a 7.9 mm ID horizontal smooth tube. Using a water-heated, double-tube type evaporator, the local heat transfer coefficients are measured for both counter and parallel flows. Based on the supposition of Chen that the total heat flux is represented as the sum of forced convective contribution and nucleate boiling contribution, a correlation equation is proposed for the data in the annular-flow regime. The mean deviation between the calculated and measured heat transfer coefficients is 12.2% for the present experimental data and 9.5% for the data available from literature. The proposed correlation shows that the nucleate boiling is not fully suppressed even in the high-quality region in the case of counter flow, while convective evaporation is dominant in the high-quality region with uniform heat flux condition.
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