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Experimental Study on the Performance Change of the Fin and Tube Type Heat Exchanger by the Frosting  

Kim, Jung-Kuk (Department of Energy and Environmental Engineering, Kyushu University)
Koyama, Shigeru (Department of Energy and Environmental Engineering, Kyushu University)
Kuwahara, Ken (Department of Energy and Environmental Engineering, Kyushu University)
Park, Byung-Duck (Department of Automotive Engineering, Kyungpook National University)
Kim, Dong-Hwi (Digital Appliance Research Laboratory, LG Electronics)
Sa, Yong-Cheol (Digital Appliance Research Laboratory, LG Electronics)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.21, no.2, 2009 , pp. 79-86 More about this Journal
Abstract
The present study was investigates the effect of the parameters on the frost formation and heat transfer performance such as fin shape, air temperature and air velocity. Heat transfer rate and pressure drop by frost were experimentally investigated. Effect of the wet blub temperature and air velocity on the heat transfer performance has been also investigated. The heat transfer performance of the louver fin and tube type heat exchanger was higher by maximum of 0.85% than the corrugate fin type at the air temperature of $2.0/1.5^{\circ}C$. As the wet blub temperature of air were increased, the heat transfer rate, pressure drop and mass of frost of three test models were increased. Especially, the maximum heat transfer rate and maximum pressure drop were shown for the Type B louver fin heat exchanger. As an experimental result, the enhancement factor(EF) of louver fin and tube type heat exchanger was only $0.2{\sim}0.4$ due to the high pressure drop.
Keywords
Heat transfer performance; Frost mass; Heat transfer rate; Pressure drop; Enhancement factor;
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