在外径（O.D.）为三/八分之一英寸的光滑铜管中，对制冷剂混合物管内冷凝过程中的传热系数和压降数据进行了测量。数据是在30℃和40℃的温度下采集的。对五种非共沸制冷剂混合物和纯R125进行了测试，并与R22的基线数据进行了比较。测试了四种不同的质量通量，范围从125到375 kg/s.m2。测试的混合物质量为R125（40%）/R32（60%）、R134a（90%）/R32（10%）、R134a（75%）/R32（25%）、R32（30%）/R134a（60%）和R125（44%）/R143a（53%）/R134a（4%）。在等质量流量的基础上进行比较时，只有R125（40%）/R32（60%）混合物的传热系数高于R22。在同等热容量的基础上，所有被测制冷剂的传热系数均低于R22。 通过将质量流量乘以相应制冷剂的蒸发焓，计算出相等的加热能力。这使得比较蒸发焓差异很大的制冷剂更容易。此外，所有制冷剂的传热系数都随着温度的升高而降低。关键词:冷凝、传热系数、热流、制冷剂、混合物、R125、R22、R32、R134a、R143a、测试、压降、管道、铜、温度、非共沸、比较、热含量、蒸发引用:研讨会，ASHRAE Trans。1994年，第100卷，第2部分

Heat transfer coefficient and pressure-drop data were taken during in-tube condensation of refrigerant mixtures in a smooth copper tube with an outer diameter (O.D.) of three/eighths in. The data were taken at temperatures of 30 deg C and 40 deg C. Five nonazeotropic refrigerant mixtures and pure R125 were tested and compared against baseline data for R22. Four different mass fluxes ranging from 125 to 375 kg/s.m2 were tested. The mixtures tested, on a mass basis, were R125 (40%)/R32 (60%), R134a (90%)/R32 (10%), R134a (75%)/R32 (25%), R32 (30%)/R134a (60%), and R125 (44%)/R143a (53%)/R134a (4%). When compared on an equal mass flux basis, only the R125 (40%)/R32 (60)% mixture had a heat transfer coefficient higher than that of R22. All the refrigerants tested had lower heat transfer coefficients than R22 when compared on an equal heating capacity basis. The equal heating capacity is computed by multiplying the mass flux by the corresponding refrigerant's enthalpy of vaporisation. This makes it easier to compare refrigerants with greatly different enthalpies of vaporisation. Also, the heat transfer coefficients of all the refrigerants decreased with increasing temperature.KEYWORDS: condensation, heat transfer coefficient, heat flow, refrigerants, mixtures, R125, R22, R32, R134a, R143a, testing, pressure drop, tubes, copper, temperature, non azeotropic, comparing, heat content, vaporising