Effectiveness and Humidification Capacity Investigation of Liquid-to-air Membrane Energy Exchanger under Low Heat Capacity Ratios at Winter Air Conditions  

作　　者：Miklos Kassai 

机构地区：[1]Budapest University of Technology and Economics,Faculty of Mechanical Engineering,Department of Building Service Engineering and Process Engineering,Muegyetem rakpart 3-9.,1111,Budapest,Hungary

出　　处：《Journal of Thermal Science》2015年第4期391-397,共7页热科学学报（英文版）

基　　金：financially supported by the Natural Science and Engineering Research Council of Canada (NSERC);Venmar CES,Inc.,Saskatoon,SK,Canada and Hungarian Eotvos Scholarship,Balassi Institute Hungarian Scholarship Board Office,Budapest,Hungary

摘　　要：In this research,a novel small-scale single-panel liquid-to-air membrane energy exchanger has been used to numerically investigate the effect of given number of heat transfer units(4.5),different cold inlet air temperature(1.7,5.0,10.0℃)and different low heat capacity ratio(0.4,0.5,0.6,0.7,0.8,0.9)on the steady-state performance of the energy exchanger.This small-scale energy exchanger represents the full-scale prototypes well,saving manufacturing costs and time.Lithium chloride is used as a salt solution in the system and the steady-state total effectiveness of the exchanger is evaluated for winter inlet air conditions.The results show that total effectiveness of the energy exchanger decreases with heat capacity ratio in the mentioned range.Maximum numerical total effectiveness of 97%is achieved for the energy exchanger.Increasing the heat capacity ratio values on given inlet air temperature,the humidification capacity of energy exhanger is also investigated in this paper.The humidification performance increases with heat capacity ratio.The highest humidification performance(4.53 g/kg)can be reached when inlet air temperature is 1.7℃,and heat capacity ratio is 1.0 in winter inlet air conditions in the range of low heat capacity ratio.

关 键 词：energy exchanger performance EFFECTIVENESS liquid desiccant air-conditioning ventilation 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]