... conducts experimental research on in-tube condensation heat transfer using refrigerants R513A and R134a in six test tubes, comprising both smooth and microfin tubes with outer diameters of 9.52 mm and 12.7 mm, respectively. The microfin tubes are available in two types, with 60 and 65 fins, respectively...

...Yuande Dai; Qingqing Tang; Chaoping Xu In this paper, the flow condensation heat transfer characteristics of the environmentally friendly nearly-azeotropic refrigerant R1234ze(E)/R152a (mass ratio of 40:60) in smooth tubes with varying structures were numerically investigated. Under the operating...

... the efficiency of overall condensation heat transfer. The tube geometry not only impacts flow field but also affects various parameters associated with gas and liquid films. The optimum tube geometry is therefore beneficial to reduce involved thermal resistances and improve the performance of heat exchange...

.... Series of experiments were carried out on scaled separate effects test facilities with vertical single tube and four tube bundle condensers. The results of experimental data on the rate of condensation heat transfer, the effects of noncondensable, and parametric effects, such as pressure, tube diameters...