R134a管外强化沸腾实验数据处理新方法  

A NEW DATA TREATMENT METHOD FOR BOILING HEAT TRANSFER OF R134A ON THE OUTSIDE OF TUBES

作　　者：王润格[1] 黄万鹏[1] 张春明[2] 陈文奎[1] 陆明华[2] 罗行[1] 

机构地区：[1]上海理工大学,上海200093 [2]江苏萃隆铜业有限公司,江苏常熟215562

出　　处：《工程热物理学报》2007年第6期986-988,共3页Journal of Engineering Thermophysics

基　　金：上海浦江人才计划项目资助(No.05PJ14078);上海市重点学科建设项目资助(No.T0503)

摘　　要：在水平管外沸腾换热实验中,热流密度沿管长方向的变化幅度较大,采用Wilson方法所得到的管内对流换热系数偏高,而管外沸腾换热系数偏低。为解决这一问题,本文提出了一种新的数据处理方法-局部换热系数法,并采用这种方法对实验测定R134a在水平放置的机械加工强化表面沸腾传热管的实验数据进行分析和处理,得到了较合理的结果.In the experimental measurement of boiling heat transfer coefficients outside a tube, there would be a large variation of local heat flux along the tube. Therefore, the Wilson Plot Method might yield positive deviations in convective heat transfer coefficients inside the tube and negative deviations in boiling heat transfer coefficients outside the tube. A new method for the data treatment considering the local heat transfer coefficient variation was proposed in the present work and was applied to the data treatment of the experimental measurement of boiling heat transfer outside the mechanically manufactured enhanced heat transfer tubes and reasonable values of heat transfer coefficients on both sides of the enhanced boiling heat transfer tubes were obtained.

关 键 词：强化传热管 水平管外沸腾换热 局部换热系数 R134A Wilson作图法 

分 类 号：TK124[动力工程及工程热物理—工程热物理]