比较了制冷剂R134a和R12在由两种翅片管几何形状和两种强化管几何形状构成的管束上的壳程冷凝传热系数数据。测试的管束为五排宽五排深，交错排列，水平节距为22.2mm（0.875 in.）垂直间距为19.1毫米（0.75英寸）。这些数据是在35℃（95℉）的制冷剂饱和温度下，在18000至40000 W/m²（5700至12700 Btu/[h×ft²）的管束热通量范围内获得的。 计算了管束和每排中间管的平均冷凝传热系数。数据显示，R134a在所有四种管几何形状上的性能都优于R12。数据还表明，对于给定的管束，两种制冷剂的行对行行为相似。关键词:管壳式冷凝器，冷凝，传热系数，制冷剂，R134a，R12，翅片管，性能，热流，饱和温度，实验，测试，比较引用:ASHRAE Trans。 1994年，第100卷，第2部分，论文编号3808（RP-676），257-264，图10。，2个标签。，参考文献3。

Shell-side condensation heat transfer coefficient data are compared for refrigerants R134a and R12 on tube bundles constructed from two finned-tube geometries and two enhanced-tube geometries. The tube bundles tested are five rows wide by five rows deep and have a staggered tube arrangement with a horizontal pitch of 22.2mm (0.875 in.) and a vertical pitch of 19.1mm (0.75 in.). The data were obtained at a refrigerant saturation temperature of 35 deg C (95 deg F) over a bundle heat flux range of 18,000 to 40,000 W/m2(5,700 to 12,700 Btu/[h×ft2] ). Average condensing heat transfer coefficients for the bundle as well as the middle tube of each row were calculated. The data show that R134a performs better than R12 on all four tube geometries. The data also show that for a given tube bundle, the row-to-row behaviour of both refrigerants is similar.KEYWORDS: shell and tube condensers, condensation, heat transfer coefficient, refrigerants, R134a, R12, finned tubes, performance, heat flow, saturation temperature, experiment, testing, comparing