摘要
本文对R134a在板式换热器内的凝结换热特性进行了实验研究,通过测量换热器中冷却水及板壁温度获得了局部凝结换热系数随蒸气干度、质量流量及热流密度的变化关系.实验结果表明,凝结换热系数随着蒸气干度增加而增加.文章还将实验结果与部分文献数据进行了比较与分析.本文的研究为换热准则关系式的发展提供了实验数据.
Experimental investigation on R134a in an industrial plate heat exchanger （PHE） was carried out. The temperatures of cooling water and plate inside the PHE were measured and the quasilocal heat transfer coefficients for condensation in PHE were obtained. The variation of condensation heat transfer coefficient with vapor quality, mass flow rate and heat flux are presented in the paper. The results show an increase of heat transfer coefficients with the vapor quality. Comparisons with the limited available data from literature and several correlations indicate a need for further theoretical developments. The present data may be suitable for developing correlations of the thermo-hydraulic performance of plate condensers as a function of flow, heat flux and plate parameters.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2008年第2期278-280,共3页
Journal of Engineering Thermophysics
基金
上海市重点学科建设项目(No．T0503)
上海浦江人才计划项目(No．05PJ14078)
关键词
板式换热器
凝结换热
R134A
plate heat exchanger
condensation heat transfer
R134a
