非共沸混合致冷剂水平管外冷凝的传热性能

本文对二元和三元非共沸混合工质的水平管外冷凝传热性能进行了试验研究。由实验数据建立了适合于低蒸汽流速下管外强迫流动冷凝传热的准数关联式,计算误差在±15％内,可供工程设计参考使用。

HEAT TRANSFER CHARACTERISTICS OF CONDENSATION OF NONAZEOTROPIC REFRIGERANT BLENDS OUTSIDE A HORIZONTAL TUBE

Experimental investigation of heat transfer characteristics is carried out for the condensation of binary and ternary nonazeotropic refrigerant blends outside a horizontal tube. Based on the experimental data, dimensionless correlations are established for describing the forced flow and heat transfer of condensation outside the tube at a lower flow rate of vapor. The predicted results, with a mean relative deviation within ±15％, are helpful to engineering design.