对数平均温差法计算制冷冷凝器和蒸发器的合理性分析

Analysis on the rationality of LMTD method applied in calculation of refrigeration condensers and evaporators

通过分析说明 ,用对数平均温差法计算制冷冷凝器和蒸发器是不合理的 .用 R1 34 a水平管内局部凝结换热系数的实验数据及分段计算法说明了由于这种不合理性导致的误差可能是相当显著的 .用分段计算法可以消除这种方法上的缺陷 .

The rationality of LMTD method applied in calculation of refrigeration condensers and evaporators is analyzed and proved to be unfit for the case. The exploitation of experimental local condensation data of R134a in horizontal tube and the divisional calculation method, showed that the LMTD method may result in obvious errors which can be eliminated by the divisional calculation method.