蒸发冷却制备冷水流程的热学分析  

Thermological principle of moist air heat and moisture conversion processes

作　　者：江亿[1] 刘晓华[1] 谢晓云[1] 

机构地区：[1]清华大学

出　　处：《暖通空调》2011年第3期1-12,共12页Heating Ventilating & Air Conditioning

基　　金：国家自然科学基金资助项目(编号:50778094)

摘　　要：利用空气-水热湿交换过程湿和显热相互转换的原理,从的角度对蒸发冷却过程进行了重新认识和分析。比较了直接蒸发冷却和间接蒸发冷却制备冷水方式,从损失的角度指出了两种方式制取冷水极限温度不同的本质原因。在换热面积无限大和换热面积有限两类工况下,通过湿-显热转换过程分析了两种不同结构的间接蒸发冷却制备冷水的流程。在换热面积有限工况下,通过显热和湿的转换得到了系统的显热损失平衡的原理,研究了流程内部各环节换热面积分配的优化方法;比较了间接蒸发冷水机的两种不同结构,尝试从系统换热量与制冷量之比、系统总传递损失的角度得出对流程结构的一些新的认识。Establishes a primary theoretical frame to analyse this process by thermology. Setting the reasonable heat transfer capability according to the temperature difference between indoor and outdoor air is the key to transport heat through envelope. The temperature between indoor air and heat source or sink drives heat transfer in air conditioning system and the relationship of temperature and heat should be considered in choosing heat source or sink. To reduce transfer links and temperature difference of each link based on a satisfied need of heat transfer is the matter to reduce energy use and some possible ways to reduce the temperature difference are obtained by means of analyzing influencing factors. Also discusses the transition between moisture transfer driving force and heat transfer driving force.

关 键 词：热湿环境营造 围护结构 空调系统 温差 降低能耗 

分 类 号：TU375.4[建筑科学—结构工程]