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강위관(Wee-Kwan Kang),박중석(Joong-Seok Park),이대영,김무근(Moo Geun Kim) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
Ren et al. analyzed the performance of the indirect evaporative cooler according to the direction of the flow considering evaporation water flow and wetness. However the effect of NTU of each channel on the performance of the indirect evaporative cooler according to the direction of the flow was not analyzed exactly. In this study the effect of the direction of the flow on the indirect evaporative cooling performance changing NTU of each channel are investigated theoretically. The cooling process of the indirect evaporative cooler by flow direction is modeled into a set of linear differential equations and solved to obtain the exact solutions to the temperatures of the hot fluid. the moist air. and evaporation water. Based on the exact solution in the case of different NTU of each channel. we study the change of the distribution of the temperature according to each flow direction and at the same time analyze the effect of the flow direction on the cooling performance.