CFCs替代工质R134a在水平管束外池沸腾传热  

Pool Boiling Heat Transfer of CFCs Alternative R134a outside a Horizontal Tube Bundle

作　　者：杨少华[1] 王世平[1] 高学农[1] 

机构地区：[1]华南理工大学化学工程研究所

出　　处：《高校化学工程学报》1998年第3期226-230,共5页Journal of Chemical Engineering of Chinese Universities

基　　金：广东省自然科学基金

摘　　要：研究了替代工质Ｒ１３４ａ在沸腾温度为３０４．８Ｋ时，在光滑管管束和机械加工表面多孔管管束外的池沸腾换热性能，并探讨了其换热机理。研究结果表明，Ｒ１３４ａ在光滑管管束外的池沸腾存在明显的管束效应，而在机械加工表面多孔管管束外沸腾无管束效应出现，在相同热流密度下管束的各排管的沸腾传热系数均低于其单管值。An experimental investigation of the pool boiling of R134a outside horizontal plain and E tube bundle has been conducted at 304.8K. The experimental results of the pool boiling of R134a outside a plain tube bundle show that a definite bundle effect exists. But for E tube bundle there exists no tube bundle effect. The boiling heat transfer coefficient of the tube in bundle is basically lower than that of a single tube.

关 键 词：池沸腾 传热 管束效应 替代工质 制冷剂 R134A 

分 类 号：TB64[一般工业技术—制冷工程]