HFC－134a水平管内对流换热实验研究  

An experimental study of convective heat transfer of HFC-134a in horizontal tubes

作　　者：张小力[1] 刘纪伟[1] 蔡祖恢[1] 

机构地区：[1]华东工业大学动力工程学院

出　　处：《华东工业大学学报》1995年第1期20-26,共7页

基　　金：国家自然科学基金

摘　　要：本文对ＨＦＣ－１３４ａ水平管内单相对流换热进行了实验研究．用实验所获数据与常用换热关系式进行了比较，计算结果表明Ｐｅｔｕｋｈｏｖ和Ｔａｋａｍａｔｓｕ关系式与实验数据吻合较好．本文最后用实验数据拟合出一个ＨＦＣ－１３４ａ管内单相对流换热关系式，在给定的范围内，其算术平均误差为０．１６４％．绝对平均误差为４．９６８％．The experiment reported here focuses on single-phase heat transfer of HFC-134a flowing inside a 10 mm ID horizontal smooth tube. Altogether 117 local heat transfer coefficient data have been obtained. The experiment was conducted in the following conditions: Mass flow flux G from 21.97 ～54.06 g/s; heat flux q from 0.5～5.13 kW/m2, while keeping entrance pressure as 0.4 MPa. A comparison is made between the experimental data obtained and Dittus-Boelter, Petukhov,Takamatsu's correlations. A good agreement is found except the first. At the end of this paper, a new correlation is derived from these data given by the authors, whose average deviation is 0.164% and absolute deviation is 4.968% in given conditions.

关 键 词：对流换热 换热关系式 传热 HFC-134a水平管 

分 类 号：TB611[一般工业技术—制冷工程] TK124[动力工程及工程热物理—工程热物理]