이산화탄소적용 에어컨시스템의 마이크로채널 증발기에 대한 최적화 연구

The Optimization Study of the Cooling System Microchannel Evaporator with CO2 Application

The purpose of this study is to determine the performance characteristics for the micro-channel evaporator with various operating conditions. The performance of four kind of HX models were analyzed and optimized with the variation of refrigerant inlet pressure, mass flow rate, air velocity and outdoor temperature. As a result, the evaporator with 13 tubes showed the maximum capacity with variable operating conditions due to the increase of heat transfer area. In addition, the pressure drop of the evaporator with 13-tube increased significantly because the heat flux improved owing to the decrease of cross section area.