采用吸湿剂处理湿空气的流程优化分析  

Optimization of heat and mass transfer processes between desiccant and moist air

作　　者：刘晓华[1] 张涛[1] 江亿[1] 

机构地区：[1]清华大学

出　　处：《暖通空调》2011年第3期77-87,共11页Heating Ventilating & Air Conditioning

基　　金：教育部博士点基金资助项目(编号:20090002120022);高等学校全国优秀博士学位论文作者基金资助项目

摘　　要：分析了吸湿剂与空气直接接触的热湿传递过程,得到了溶液与空气热湿传递过程中传热、传湿阻力表达式,比较了溶液-空气不同进口状态的传热、传湿不匹配系数。在溶液进口状态等浓度线上进行的热湿传递过程传热、传湿不匹配系数最小,而等焓线上发生的过程的传热、传湿不匹配系数较大。在构建溶液与空气的热湿处理流程中,应尽可能使除湿与再生过程贴近溶液等浓度线进行。固体吸湿剂与溶液之间的性质差异使得固体吸湿剂与空气间的热湿传递过程一般沿着等焓线发生。Analyses the heat and mass transfer processes between moist air and desiccant,and obtains the expression of heat and moisture transfer resistance.Compares the unmatching coefficients of heat and moisture transfer under different inlet states of air and desiccant.The process along isoconcentration line of inlet desiccant point shows least unmatching coefficients,and the process along isenthalpic line expresses higher unmatching coefficients.Thus dehumidification and regeneration processes are recommended to proceed along isoconcentration line,which means to heat desiccant in the regenerator and cool desiccant in the dehumidifier.Due to the property difference between solid desiccant and liquid desiccant,the handling process of air in desiccant wheel generally proceeds along isenthalpic line.

关 键 词：吸湿剂 热湿传递 不匹配系数 流程优化 

分 类 号：TU834.9[建筑科学—供热、供燃气、通风及空调工程]