摘要
本文提出了一个新的非共沸混合工质水平管内强制对流蒸发换热计算经验公式，该式简单准确，对１４２个实验数据的计算表明，误差小于１０％的数据点占９０．１４％，最大相对误差为２３．６７％．文中提供广确定非共沸混合工质热力性质和热物性的方法，并指出在强制对流蒸发工况下，传质阻力对换热的影响可以忽略不计．
A new correlation for forced convection vaporization heat transfer of no n-azeotropic refrigerant mixtures inside a horizontal tube is developed. It is simple but accurate. For the calculation of 142data points, 90. 14% of them are within the relative deviation of 10%. The maximum deviation is 23 .67%. Methods of determiming the thermodynamic and transport properties of non-azeotropic refrigerant mixtures are introduced. According to the calculation and analysis, a conclusion is reached that the effect of mass transfer resistance on heat transfer is negligible under the condition of forced convection vaporization.
关键词
换热
非共沸致冷剂
强制对流蒸发
Correlation of heat transfer
Non-azeotropic refrigerantmixture
Horizontal flow
Forced convection vaporization
