Heat transfer correlation for saturated flow boiling of water
Heat transfer correlation for saturated flow boiling of water
复制标题
水饱和流动沸腾的传热关系
DOI：
10.1016/j.applthermaleng.2014.11.024
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发表时间：
2015-02-05
影响因子：
6.4
通讯作者：
Wang, Hao
中科院分区：
文献类型：
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作者：
Fang, Xiande;Zhou, Zhanru;Wang, Hao
水（H2O，R718）的饱和流动沸腾传热在紧凑型换热器和电子冷却等应用中经常遇到，需要精确关联蒸发传热系数。提出了一系列两相流动沸腾传热系数的关联式。然而，它们对H2O的预测精度并不令人满意。本工作编制了一个H2O数据库的1055个实验数据点，从微/小通道从9个独立的研究，评估41个现有的关联式提供了线索，发展一个更好的饱和流动沸腾传热系数的H2O的关联式，然后提出了一个新的。新的关联式采用了新提出的无量纲数，在预测精度上有了很大的提高。它的平均绝对偏差为10.1%，预测整个数据库的81.9%在+/- 15%以内，91.2%在+/-20%以内，远远优于现有的最佳数据库。除此之外，它还适用于其他几种工质，如R22，R134 a，R410 A和NH3（氨，R717），是迄今为止最好的R22，R410 A和NH3。(C)2014爱思唯尔有限公司版权所有。
The saturated flow boiling heat transfer of water (H2O, R718) is encountered in many applications such as compact heat exchangers and electronic cooling, for which an accurate correlation of evaporative heat transfer coefficients is necessary. A number of correlations for two-phase flow boiling heat transfer coefficients were proposed. However, their prediction accuracies for H2O are not satisfactory. This work compiles an H2O database of 1055 experimental data points from micro/mini-channels from nine independent studies, evaluates 41 existing correlations to provide a clue for developing a better correlation of saturated flow boiling heat transfer coefficients for H2O, and then proposes a new one. The new correlation incorporates a newly proposed dimensionless number and makes great progress in prediction accuracy. It has a mean absolute deviation of 10.1%, predicting 81.9% of the entire database within +/- 15% and 91.2% within +/- 20%, far better than the best existing one. Besides, it also works well for several other working fluids, such as R22, R134a, R410A and NH3 (ammonia, R717), being the best for R22, R410A and NH3 so far. (C) 2014 Elsevier Ltd. All rights reserved.