Entransy dissipation minimization for optimization of heat exchanger design  

作　　者：LI XueFang GUO JiangFeng XU MingTian CHENG Lin 

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

出　　处：《Chinese Science Bulletin》2011年第20期2174-2178,共5页

基　　金：supported by the National Basic Research Program of China(2007CB206900);International Science and Technology Cooperation Project of Shandong Province(2008GJHZ20701)

摘　　要：In this paper,by taking the water-water balanced counterflow heat exchanger as an example,the entransy dissipation theory is applied to optimizing the design of heat exchangers.Under certain conditions,the optimal duct aspect ratio is determined analytically.When the heat transfer area or the duct volume is fixed,analytical expressions of the optimal mass velocity and the minimal entransy dissipation rate are obtained.These results show that to reduce the irreversible dissipation in heat exchangers,the heat exchange area should be enlarged as much as possible,while the mass velocity should be reduced as low as possible.In this paper,by taking the water-water balanced counterflow heat exchanger as an example,the entransy dissipation theory is applied to optimizing the design of heat exchangers.Under certain conditions,the optimal duct aspect ratio is determined analytically.When the heat transfer area or the duct volume is fixed,analytical expressions of the optimal mass velocity and the minimal entransy dissipation rate are obtained.These results show that to reduce the irreversible dissipation in heat exchangers,the heat exchange area should be enlarged as much as possible,while the mass velocity should be reduced as low as possible.

关 键 词：耗散理论 换热器 设计 优化 最小化 低质量流速 传热面积 热交换器 

分 类 号：TK172[动力工程及工程热物理—热能工程] TP13[自动化与计算机技术—控制理论与控制工程]