막 응축형 응축기에서의 R1233zd(E) 냉매가스 분배판 형상에 따른 유동분배 특성 분석

Abstract

In this study, analytical study was conducted to obtain optimal distribution plate shape applied falling film type condenser. In a vapor compression refrigeration, the refrigerant at the inlet of condenser is a gas state. Therefore, to enhance the heat transfer performance of the condenser, the even distribution of the refrigerant(gas) of the condenser is essential. The optimization process of the distribution plate consisted of a two steps. In the first step, five model analysis were performed to review the direction of the study, including the existing distribution plate being used. In the second step, the optimization of design parameters was carried out. The saturated condensation temperature fixed at 38℃. R1234ze(E) was used as refrigerant. Length of distribution plate, hole size, and the number of width and length hole were selected as design parameters of distribution plate. It was obtained that the distribution performance of porous distribution plate is better than that of existing model. Distribution performance index(standard deviation) was 0.43 at model 3(second step). As a result, we proposed optimized distribution plate shape through distribution performance analysis for variety of the distribution plate shapes.