가스인젝션 기술을 적용한 공기열원 가변속 열펌프의 냉방성능 향상에 관한 연구 : The Cooling Performance Enhancement of a Variable Speed Heat Pump Using Gas Injection Technique
The Cooling Performance Enhancement of a Variable Speed Heat Pump Using Gas Injection Technique
- 주제(키워드) Gas injection(가스인젝션) , Cooling performance(냉방성능) , Two-stage cycle(2단 사이클) , Gas/liquid separator(기액분리기)
- 발행기관 대한설비공학회
- 발행년도 2009
- 총서유형 Journal
- UCI G704-000168.2009.21.8.002
- KCI ID ART001367532
- 본문언어 한국어
초록/요약
In this study, the improvement of cooling capacity by applying gas injection technique in a two-stage heat pump using R410A was experimentally investigated. A twin rotary type compressor with gas injection was applied to the heat pump system. The optimum refrigerant charge for the injection and the non-injection cycles was selected to achieve the maximum COP at the cooling standard condition. The injection cycle showed less optimum refrigerant charge than that of the non-injection cycle. The cooling performances of the injection and the non-injection cycles were measured and compared by varying compressor frequency from 40 to 90 Hz. The cooling capacity of the gas injection cycle was 1.6%~11.3% higher than that of the non-injection cycle. The COP of the gas injection cycle was 13.7% to 28.9% higher than that of the non-injection cycle at the same cooling capacity. The heat pump system showed stable operation after 30% of the injection valve opening.
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