Entransy dissipation number and its application to heat exchanger performance evaluation

查看全文 作　　者：GUO JiangFeng CHENG Lin XU [1]MingTian

机构地区：[1]Institute of Thermal Science and Technology, Shandong University, Jinan 250061, China

出　　处：《Chinese Science Bulletin》索引2009年第54卷第15期,共6页

基　　金：Supported by the National Basic Research Program of China (Grant No. 2007CB206900) 摘　　要：Based on the concept of the entransy which characterizes heat transfer ability, a new heat exchanger performance evaluation criterion termed the entransy dissipation number is established. Our analysis shows that the decrease of the entransy dissipation number always increases the heat exchanger effectiveness for fixed heat capacity rate ratio. Therefore, the smaller the entransy dissipation number, the better the heat exchanger performance is. The entransy dissipation number in terms of the number of exchanger heat transfer units or heat capacity rate ratio correctly exhibits the global performance of the counter-, cross-and parallel-flow heat exchangers. In comparison with the heat exchanger performance evaluation criteria based on entropy generation, the entransy dissipation number demon-strates some distinct advantages. Furthermore, the entransy dissipation number reflects the degree of irreversibility caused by flow imbalance. 关键词：性能评价换热器消耗应用传热能力基于特征评价标准效率下降

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Entransy dissipation number and its application to heat exchanger performance evaluation

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