基于热不平衡考虑的溶液除湿/再生传热传质系数(Ⅰ)模型与Le-h_D测量法  

Heat and mass transfer coefficients of liquid desiccant dehumidification/regeneration processes with non-thermal equilibrium(Ⅰ) Model and Le-hD evaluation method

作　　者：彭冬根[1] 曹熔泉[2,3] 张小松[2] 殷勇高[2] 

机构地区：[1]南昌大学建筑工程学院,江西南昌330031 [2]东南大学能源与环境学院,江苏南京210096 [3]上海核工程研究设计院,上海200233

出　　处：《化工学报》2011年第9期2433-2439,共7页CIESC Journal

基　　金：国家自然科学基金项目(50976021;51006022);江西省教育厅青年科学基金项目(GJJ11063)~~

摘　　要：溶液除湿装置是溶液除湿空调系统中一个重要单元,其内部传热传质规律对系统性能起到决定性影响。在溶液绝热除湿模型基础上,提出考虑热不平衡的除湿模型用以计算溶液除湿过程的传热传质系数。模拟计算发现考虑热不平衡模型计算的溶液和空气出口参数与实验值能更好吻合,从而说明该模型能更准确计算除湿过程传热传质系数。当热容率比C*≥1.0时,考虑热不平衡除湿模型计算的传质单元数和Lewis数要远优于绝热模型计算结果;而当C*≤0.05时,考虑热不平衡除湿模型和绝热模型计算结果相差较小。The liquid dehumidifiers are the key unit for liquid desiccant cooling system（LDCS）and the internal heat and mass transfer of dehumidifier have important influence on the performance of LDCS.Based on the adiabatic dehumidification model,a new model considering non-thermal equilibrium was put forward to evaluate heat and mass transfer coefficients.By simulation calculation,it is found that the outlet parameters of air and liquid from non-thermal equilibrium model agree well with the experimental values,so that the model is better to evaluate heat and mass transfer coefficients.When the heat capacity rate ratio C^＊≥1.0,the calculation results for the number of mass transfer units and Lewis factor from non-thermal equilibrium model are much better than those from the adiabatic model,while the two models give almost the same results when C^＊≤0.05.

关 键 词：溶液除湿 传热传质系数 热不平衡 

分 类 号：TK511.3[动力工程及工程热物理—热能工程]