本文讨论了润滑油对光滑管核沸腾性能的影响。研究中使用的润滑油包括3GS和5GS，工作制冷剂为R-22。实验在饱和温度为-5℃、4.4℃和20℃时进行。对于冷冻油混合物，传热系数h在Ts=20℃时随油浓度的增加而减小。相反，对于Ts=-5℃时，冷冻油混合物的传热系数可能大于低油浓度下纯制冷剂的传热系数。这种现象的可能解释包括（1）物理性质的影响，尤其是表面张力的影响，以及（2）发泡特性。 单位:SICitation:研讨会，ASHRAE交易，第105卷，第页。1.

This paper discusses the effect of lubricant oil on nucleate boiling performance for a smooth tube. The lubricant oil used in the investigation includes 3GS and 5GS, and the working refrigerant is R-22. Experiments were conducted at saturation temperatures of -5°C, 4.4°C, and 20°C. For refrigerant-oil mixtures, the heat transfer coefficients, h, decrease with increase of oil concentrations at Ts= 20°C. Conversely, for Ts= -5°C, the heat transfer coefficients for refrigerant-oil mixtures may be larger than those of pure refrigerants at low oil concentration. Possible explanations for this phenomenon include (1) the effect of physical properties, especially that of surface tension, and (2) foaming characteristics.Units: SI