基于内冷式干燥剂换热器的固体除湿空调技术研究进展

Research Progress on Solid Desiccant Air-conditioning Technology based on Internal Cooled Desiccant Coated Heat Exchanger

基于内冷式干燥剂换热器的新型固体除湿空调技术,可有效克服转轮除湿空调系统升温除湿的不足,并能充分利用大量略高于环境温度的工业废热(30~60℃),具有巨大的节能效益。本文基于内冷式干燥剂换热器的固体除湿空调技术,从干燥剂材料、热湿传递过程和系统性能3个方面,总结近年来的研究进展,对面临的相关科学问题和挑战进行了梳理。高吸附、40℃低温再生且无腐蚀干燥剂的研制是提升该技术的前提,针对不同干燥剂种类考虑其与空气间的热湿传递过程机理是该技术的关键。基于制冷空调或材料学科的发展趋势,给出可能的未来发展方向,以期推动该新型固体除湿空调技术在工业余热利用、环境湿度处理、新风机组和空调等领域的应用。

A new type of solid desiccant air-conditioning technology based on internal cooled desiccant coated heat exchanger overcomes the shortcoming of rotary desiccant air-conditioning systems,such as nonisothermal dehumidification.It can make full use of a large quantity of industrial waste heat that is slightly higher than environmental temperature(30-60℃),and has great energy-saving potential.Focusing on the research subject of this novel solid desiccant air-conditioning technology,some important advances in recent years from three aspects,i.e.,desiccant materials,heat and mass transfer process,and the performance of solid desiccant air-conditioning system are summarized in this study.Related scientific problems and challenges are discussed.The development of desiccant that possesses high adsorption quantity,good regeneration ability at approximately 40℃,and noncorrosive property is the premise to improving the technology.Investigation on mechanism of heat and mass transfer between air and different types of desiccant is the key to the technology.Finally,potential future research directions are pointed out based on the development trend of refrigeration,air conditioning,and material science.In this way,the application of this novel solid desiccant air-conditioning technology in the fields of industrial waste heat utilization,environmental humidity treatment,fresh air handling unit,and air-conditioning can be anticipated and promoted.