本研究旨在提供R-410A在水平光滑铜传热管内流动的传热系数和压降数据，并获得R-410A的传热系数和压降的经验关联式，以设计安装在空调器中的热交换器。在本实验中，使用外径为7.0 mm（2.2 In.）的水平铜光滑管并对R-410A（包括R-407C和R-22）在实际空调蒸发和冷凝条件下的局部传热系数和压降进行了测量。为了获得关联式，将传热系数的实验结果与现有关联式进行了比较，同时开发了新的蒸发和冷凝压降两相摩擦系数关联式。 由于R-410A的实验数据与现有的蒸发传热系数和冷凝传热系数关联性良好，且压降数据也与现有的唯一方程式关联性良好，本文提出的传热系数和压降的关联式适用于R-410A换热器的设计。单位:双引证:研讨会，ASHRAE交易，1998年，第104卷，第2部分，多伦多

This study was carried out to provide data on heat transfer coefficient and pressure drop for R-410A flowing inside a horizontal smooth copper heat transfer tube and also to obtain the empirical correlations of the heat transfer coefficient and pressure drop for R-410A to design the heat exchanger installed in an air conditioner. In the present experiments, a horizontal copper smooth tube with an outside diameter of 7.0 mm (2.2 in.) was employed, and the measurements of local heat transfer coefficient and pressure drop for R-410A, including R-407C and R-22, were made under the practical evaporation and condensation conditions of the air conditioner. In order to obtain the correlations, the experimental results of heat transfer coefficients were compared with the existing correlations, while the new correlations of two-phase friction multipliers for evaporation and condensation pressure drops were developed in this investigation. Since good agreement between the experimental data for R-410A and the existing correlations was shown for both evaporative and condensing heat transfer coefficients and the pressure drop data were also well correlated by the present unique equations, the correlations proposed in this investigation on heat transfer coefficient and pressure drop are applicable to designing a heat exchanger using R-410A.Units: Dual