Experimental and Theoretical Study of an Internally Cooled Liquid Desiccant Dehumidifier  

作　　者：ZHENG Xin LU Yuan WANG Bo ZHAO Lifeng XIAO Yunhan 

机构地区：[1]Key Laboratory of Advanced Energy and Power,Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing,100190,China [2]Research Center for Clean Energy and Power,Chinese Academy of Sciences,Lianyungang,222069,China [3]University of Chinese Academy of Sciences,Beijing,100049,China

出　　处：《Journal of Thermal Science》2023年第4期1684-1696,共13页热科学学报（英文版）

基　　金：supported by National Science and Technology Major Project (No.2017-Ⅰ-0009-0010)

摘　　要：Liquid desiccant dehumidifiers are useful for simultaneously recovering heat and water from flue gas.Internally cooled dehumidifiers are generally superior to adiabatic dehumidifiers in terms of the consumption of the desiccant and the size of the equipment required.This study examines the performance of a counter-flow dehumidifier through experiments and simulations under different operating conditions,and analyzes the moisture effectiveness and enthalpy effectiveness as performance indices.By applying correlations from the literature,the theoretical model can predict the performance of the dehumidifier within an acceptable range of accuracy.According to the experimental results,droplets were visible at a low desiccant flow rate when the velocity of the gas was above 4.88 m/s.Moreover,a higher cooling ratio and a higher temperature of the solution enhanced the effectiveness of the dehumidification.A temperature cross occurred between the gas and the solution when the mass transfer was sufficiently high,which reflects better heat transfer performance than the conventional convective heat exchanger.

关 键 词：flue gas RECOVERY WATER HEAT internal cooling calcium chloride 

分 类 号：TM925.13[电气工程—电力电子与电力传动] X773[环境科学与工程—环境工程]