2차 냉매로서 CO2를 사용하는 간접 냉동시스템의 열전달과 펌프 소비동력

Abstract

In this paper, the heat transfer coefficient and pump consumption power of indirect refrigeration system using CO2 as a secondary refrigerant were investigated experimentally. First, from the comparison of pump consumption powers of existing brines(EG, PG, EA etc.) and CO2 as secondary refrigerants at the same experimental conditions, PG and CO2 show the highest and lowest power, respectively. Second, the heat transfer coefficient of CaCl2 is the highest, but PG is the lowest among other secondary refrigerants. From the above results, it is confirmed that CO2 as the secondary refrigerant has excellent characteristics when comparing to existing brines. Thus, it is concluded that CO2 is applicable as the secondary refrigerant of indirect refrigeration system.