Entransy-dissipation-based thermal resistance analysis of heat exchanger networks  

作　　者：QIAN XiaoDong LI Zhen LI ZhiXin 

机构地区：[1]Key Laboratory of Thermal Science and Power Engineering of Ministry of Education, School of Aerospace, Tsinghua University, Beijing 100084,China

出　　处：《Chinese Science Bulletin》2011年第31期3289-3295,共7页

基　　金：supported by the National Basic Research Program of China (G2007CB206901)

摘　　要：Heat exchanger network optimization has an important role in high-efficiency energy utilization and energy conservation. The thermal resistance of a heat exchanger network is defined based on its entransy dissipation. In two-stream heat exchanger networks, only heat exchanges between hot and cold fluids are considered. Thermal resistance analysis indicates that the maximum heat transfer rate between two fluids corresponds to the minimum entransy-dissipation-based thermal resistance; i.e. the minimum thermal resistance principle can be exploited in optimizing heat exchanger networks.Heat exchanger network optimization has an important role in high-efficiency energy utilization and energy conservation. The thermal resistance of a heat exchanger network is defined based on its entransy dissipation. In two-stream heat exchanger networks, only heat exchanges between hot and cold fluids are considered. Thermal resistance analysis indicates that the maximum heat transfer rate between two fluids corresponds to the minimum entransy-dissipation-based thermal resistance; i.e. the minimum thermal resistance principle can be exploited in optimizing heat exchanger networks.

关 键 词：换热网络 最小热阻 耗散 基础 网络优化 节约能源 能源利用 传输速率 

分 类 号：TK172[动力工程及工程热物理—热能工程]