逆流换热器传递系数分析  

Analysis on Exergy Transfer Coefficient of Counterfolw Heat Exchanger

作　　者：张明智[1] 任敬科[1] 徐培培[1] 魏博[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,河北保定071003

出　　处：《电力科学与工程》2010年第4期53-57,共5页Electric Power Science and Engineering

基　　金：国家自然科学基金资助项目(50877027)

摘　　要：在考虑管壁壁厚热阻和管壁污垢影响的情况下,导出了逆流换热器高低温流体的温度分布和管壁温度分布计算式。在考虑传热过程有压降的情况下,导出了逆流换热器的高低温流体的局部传递系数。计算式中体现出了两者内在的耦合关系,通过分析传递系数得出换热器的损分布,为确定合理的运行参数以及优化结构参数提供参考。Considering the influence on the thermoresistance and fouling of tube wall, the temperature distribution of high-low temperature fluid and tube temperature distribution formula are derived. Considering the pressure drop of the heat-transfer process, the partial exergy transfer coefficient of high-low temperature fluid of the counterflow heat exchanger is exported. The formula reflects the internal coupled relation between them. The exergy loss distribution of the heat exchanger is obtained by analyzing the exergy transfer coefficient which provides reference for determining the reasonable operational parameter and optimizing structural parameter.

关 键 词：逆流换热器 [火用]传递 焖传递系数 污垢 

分 类 号：TK123[动力工程及工程热物理—工程热物理]