膜全热交换器内热湿交换过程的熵分析  

Entropy analysis of membrane-based heat and mass exchanger

作　　者：张明瑞[1] 张立志[1] 徐学利[1] 

机构地区：[1]华南理工大学化工与能源学院传热强化与过程节能教育部重点实验室,广东广州510640

出　　处：《化工学报》2005年第11期2069-2072,共4页CIESC Journal

基　　金：国家自然科学基金项目(50306005);教育部留学回国人员科研启动资金项目.~~

摘　　要：A membrane-based heat and mass exchanger (MHME) using hydrophilic membranes to recover the heat and mass of the exhaust air was analysed.Using the second law of thermodynamics, the process of the heat and mass transfer between the fresh and the exhaust in the MHME was studied.Under the typical summer operating condition, thermal entropy increase, mechanical entropy increase, latent entropy and total entropy increase were analysed. The entropy generation per quantity of heat exchanged (EGPH), which. reflects the process’s thermodynamic irreversibility was analysed. It showed that the spacing between the membranes influenced the mechanical entropy increase most. The results also indicated that the mass velocity of the gas, the spacing between two membranes and the length of the membranes would influence the EGPH. There existed an optimal spacing where the EGPH was the least.A membrane-based heat and mass exchanger （MHME） using hydrophilic membranes to recover the heat and mass of the exhaust air was analysed. Using the second law of thermodynamics, the process of the heat and mass transfer between the fresh and the exhaust in the MHME was studied. Under the typical summer operating condition, thermal entropy increase, mechanical entropy increase, latent entropy and total entropy increase were analysed. The entropy generation per quantity of heat exchanged （EGPH）, which, reflects the process＇s thermodynamic irreversibility was analysed. It showed that the spacing between the membranes influenced the mechanical entropy increase most. The results also indicated that the mass velocity of the gas, the spacing between two membranes and the length of the membranes would influence the EGPH. There existed an optimal spacing where the EGPH was the least.

关 键 词：膜 全热交换 熵增 

分 类 号：TK124[动力工程及工程热物理—工程热物理]