采用吸湿剂处理湿空气的流程优化分析.pdfVIP

暖通空调HV AC 2011 年第41 卷第3 期 77 * m 清华大学 刘晓华 张 涛 江 亿 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 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 吸湿剂 热湿传递 不匹配系数 流程优化 Optimi zation of heat and mass transfer processes between desiccant and moist air n By Liu Xiaohua , Zhang Tao and Jiang Yi Abstract 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. Keywords desiccant, heat and mass transfer, unmatching coefficient, process optimization n Tsinghua niversity, Beijing, China ¹ 0