2단압축 이산화탄소 사이클의 성능특성에 대한 해석적 연구

In this paper a 2-stage CO₂ cycle was simulated to predict the performance characteristics with operating parameters. The simulation results showed similar tendency compared to the measured system pressure, capacity, COP etc. System characteristics were analyzed with the variations of outdoor temperature and EEV opening. In the simulation, the highest COP was 2.7 at 30-30 ㎐ and it decreased as compressor frequency increased. Besides, system COP can be increased by optimizing EEV opening.