Influence of External Heat Source on Transcritical CO2 Refrigeration System

Abstract

Synthetic refrigerants such as CFCs and HCFCs are harmful to the ozone and could cause greenhouse effect. Refrigerant alternatives research is very urgent. CO2 as a natural working fluid has zero ODP and its GWP=1, is receiving more and more attention in the refrigeration field. Transcritical CO2 refrigeration cycle is presently an important aspect of natural refrigerant alternatives research. In this paper, the transcritical CO2 refrigeration cycle system is experimental studied, influence of external heat source on system performance is analyzed. The experimental results show that cooling water temperature, chilled water flow and temperature have a great impact on system performance, while the cooling water flow has no obvious effect in the experimental device.