Progress on heat and moisture recovery with membranes: From fundamentals to engineering applications ☆
Progress on heat and moisture recovery with membranes: From fundamentals to engineering applications ☆
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DOI：
10.1016/j.enconman.2011.11.033
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发表时间：
2012-11
影响因子：
10.4
通讯作者：
Li-Zhi Zhang
中科院分区：
文献类型：
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作者：
Li-Zhi Zhang
空调能耗占全社会总能耗的1/3。对新鲜通风空气进行冷却和除湿占炎热和潮湿地区空调总能量负荷的20-40%。近年来，从通风空气中回收热湿已成为建筑节能的热点。在各种热湿回收技术中，膜式全热交换器是一种很有前途的替代技术。华南理工大学近10年来在膜热湿回收技术的基础研究和工程应用方面做了大量的工作。本文就这些研究进展作一综述。更具体地说，提出了一些新的概念，热湿传递分析。为了实现这一目标，设计了几种新型膜。构造了一些新型的换热器结构，并研究了传热传质现象。新的原型是为工程应用而建造的。结果表明，采用新材料和新结构的全热交换器，其显热效率为0.8，潜热效率为0.7。当全热交换器与新风制冷机组组合时，系统COP提高到5.8。膜系统已扩展到其他领域，如空气加湿，液体干燥剂空气加湿，和选择性吸附剂的制造。本文对这些工作进行了总结，并指出了今后的研究方向.
Energy consumption by air conditioning accounts for 1/3 of the total energy use by the whole society. Cooling and dehumidifying fresh ventilation air constitutes 20–40% of the total energy load for air conditioning in hot and humid regions. Heat and moisture recovery from ventilation air has become a hot topic for building energy conservation in these years. Of the various technologies for heat and moisture recovery, membrane-based total heat exchanger is a promising alternative. Over the past 10years, much work has been conducted in South China University of Technology for the research on membrane-based heat and moisture recovery, from fundamentals to engineering applications. In this review, the progress of these researches is introduced. More specifically, some novel concepts are proposed for heat and moisture transfer analysis. Several novel membranes are designed to accomplish the goal. Some novel exchanger structures are constructed and the heat and mass transport phenomena is investigated. Novel prototypes are built for engineering applications. The results are that a sensible effectiveness of 0.8 and a latent effectiveness of 0.7 are obtained for a total heat exchanger with novel materials and new constructions. When the total heat exchanger is combined with a fresh air refrigeration dehumidification unit, the system COP is improved to 5.8. The membrane systems have been extended to other areas like air humidification, liquid desiccant air dehumidification, and fabrication of selective adsorbents. This review gives a summary of these works and also points out the future research directions.