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열펌프의 난방운전시 핫가스 바이패스에 따른 성능 특성에 관한 실험적 연구
안재환(Jae Hwan Ahn),주영주(Youngju Joo),조일용(Ilyong Cho),강훈(Hoon Kang),김용찬(Yongchan Kim),최종민(Jongmin Choi) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
When the suction pressure of compressor decreases under its limit, the compression ratio is increased causing the malfunctions of compressor. As the method to decrease the compression ratio, hot gas bypass system is usually adopted in heat pump system. In the hot gas bypass system, the discharged gas from the compressor is bypassed into the compressor suction, which causes the increase of suction pressure and the decrease of compression ratio. In this study, the characteristics and performances of the hot gas bypass system in heat pump was investigated experimentally with a variation of the bypass flow rate ratio. With the increase of the bypass rate ratio, the compressor suction pressure was increased, even though the total capacity and COP was decreased. From the analysis of the experimental results, the optimum pressure control algorithm was suggested in this study.