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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.
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. 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. Humidi fication performance increases with heat capacity ratio. The highest humidification performance (4.53 g / kg) can be reached when inlet air temperature is 1.7 ° C and the heat capacity ratio is 1.0 in winter inlet air conditions in the range of low heat capacity ratio.