描述了确定不同浓度压缩机油对强化管几何形状上沸腾制冷剂传热系数的影响的工作。给出了在40华氏度（4.4摄氏度）条件下，使用R11和R123在水平光管和两种增强管几何形状上进行冷冻油混合物池沸腾的数据。在40华氏度制冷剂温度下，取油浓度为0.05%、1%、2%和5%的数据。数据显示，油含量增加会降低所有几何形状的沸腾系数。 结果还表明，R123的性能下降幅度小于R11。此外，与两种制冷剂的普通管相比，油对增强管的沸腾性能的影响更大。当油含量为2%时，R123和R11的增强管性能分别下降约10%和20%。关键词:沸腾、制冷剂、混合物、R11、R123、润滑剂、压缩机、蒸发器、热流、传热系数、蒸汽压缩热泵、热泵、几何结构、性能、制冷、管道、退化。 引文:研讨会，ASHRAE交易1993，第99卷，pt。1.

Describes work to determine the effects of various concentrations of compressor oil on the heat transfer coefficients of refrigerants boiling on enhanced tube geometries. Data are presented for pool boiling of refrigerant-oil mixtures on a horizontal plain tube and two enhanced tube geometries using R11 and R123 at 40 deg F (4.4 deg C). The data were taken for oil concentrations of 0.05%, 1%, 2%, and 5% at 40 deg F refrigerant temperature. The data show that increased oil content reduces the boiling coefficient for all geometries. The results also show that a smaller performance degradation occurs for R123 than for R11. Further, oil degrades the boiling performance of enhanced tubes more than for plain tubes for both refrigerants. At 2% oil, the performance degradation for the enhanced tubes is approximately 10% for R123 and 20% for R11.KEYWORDS: boiling, refrigerants, mixtures, R11, R123, lubricants, compressors, evaporators, heat flow, heat transfer coefficient, vapour compression heat pumps, heat pumps, geometry, performance, refrigeration, tubes, deteriorating.