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A simulation program was developed to evaluate the heat transfer performance of a multi-pass fin-tube evaporator, considering the pressure drop in the distributor and capillary tubes. The effect of capillary tube length for each pass was analyzed with various inlet air flow types and distributions. The appropriate capillary tube length distribution and correlation were deter-mined for various inlet air flow types and distributions. The correlated results agreed well with the simulation, with an average error of less than 7%. By applying an optimal capillary tube length distribution, the heat transfer rate was increased by 45% compared to cases with uniform tube- length distributions, for each of the inlet air flow types and distributions considered in this study.Keywords:Fin-and-tube evaporator(- ), Simulation(), Capillary tube(), Distributor(), Air flow distribution( ) †Corresponding author Tel.: +82-2-2220-0426; fax: +82-2-2295-9021 E-mail address: ksleehy@hanyang.ar.kr

Numerical Simulation of a Heat Pump Evaporator Considering the Pressure Drop in the Distributor and Capillary Tubes