| 膜全热交换器内热湿交换过程的熵分析 |
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| 引用本文： | 张明瑞,张立志,徐学利. 膜全热交换器内热湿交换过程的熵分析[J]. 化工学报, 2005, 56(11): 2069-2072 |
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| 作者姓名： | 张明瑞 张立志 徐学利 |
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| 作者单位： | 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 |
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| 基金项目： | 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. |
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| 摘 要： | 目前，在空调新风热回收领域常用的热回收装置有金属壁换热器、热管换热器、转轮全热回收器和膜全热交换器（MHME）．在这些热回收装置中，金属壁换热器和热管换热器只能回收显热，而转轮全热回收器和膜全热交换器除显热外，还能回收潜热，因此效率较高．尤其膜全热交换器由于没有运动部件，维护容易，更有发展前途．膜全热交换器与传统的只有空气与空气的显热交换的金属板式热交换器相比，
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| 关 键 词： | 膜 全热交换 熵增 |
| 文章编号： | 0438-1157（2005）11-2069-04 |
| 收稿时间： | 2005-01-04 |
| 修稿时间： | 2005-01-042005-03-25 |
Entropy analysis of membrane-based heat and mass exchanger |
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| ZHANG Mingrui,ZHANG Lizhi,XU Xueli. Entropy analysis of membrane-based heat and mass exchanger[J]. Journal of Chemical Industry and Engineering(China), 2005, 56(11): 2069-2072 |
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| Authors: | ZHANG Mingrui ZHANG Lizhi XU Xueli |
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| Affiliation: | Key Laboratory of Enhanced Heat and Energy Conservation of Ministry of Education, School of Chemical and Energy Engineering, South China University of Technology , Guangzhou 510640, Guangdong, China |
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| Abstract: | 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. |
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| Keywords: | membrane heat and mass exchanger entropy increase |
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