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가스인젝션을 적용한 이산화탄소 열펌프의 난방성능 향상에 관한 해석적 연구
정종호(Jongho Jung),백창현(Changhyun Baek),허재혁(Jaehyeok Heo),김용찬(Yongchan Kim) 대한설비공학회 2012 설비공학 논문집 Vol.24 No.11
In this study, a simulation model for a CO₂heat pump using vapor injection was developed and validated. It was used to predict the improvement of the heating performance of the CO₂heat pump at various operating conditions. The simulation results showed consistent results with the measured data. The heating performances of the vapor injection and non-injection heat pumps were compared by varying the outdoor temperature and compressor frequency. The heating capacity of the vapor injection heat pump was 40% higher than that of the non-injection heat pump at the outdoor temperature of -8℃. The performance of the vapor injection heat pump was consistently higher than that of the non-injection heat pump even when the compressor frequency was reduced to 35 Hz at the outdoor temperature of -3℃.