Investigation of thermal performance of finned tube evaporator under dry conditions

In this study,analysis of thermal performance of finned tube evaporator under dry conditions has numerically been done. the heat convection coefficient in air and refrigerant sides were calculated by considering their varying properties. in addition,the surface temperature of fin and tubes along the fin were calculated. a numerical model was developed in order to calculate the overall thermal permeability (ua) in transient regime. the numerical model was solved by using matlab r2010 program. the overall thermal permeability (ua) was examined under different air inlet temperatures and air velocity. in addition,variation of the convection heat transfer coefficient with respect to quality at the refrigerant side was examined. © 2012 tibtd printed in turkey.