모세관 압력강하를 고려한 열교환기 성능해석 프로그램

Abstract

A simulation program is developed to analyze the heat transfer characteristics of multi-pass fin-tube evaporator that considers pressure drop inside a capillary-tube. The annular flow model, which is the most proper for two phase flow under the operation condition of evaporator, is applied for describing the pressure drop of capillary-tube. The length effect of capillary-tube with different air mal-distributions are described. The appropriate length distribution of capillary-tube, which can enhance the heat transfer performance of evaporator with different types of air velocity profiles, is indicated in this paper.