가스인젝션 기술을 적용한 공기열원 가변속 열펌프의 냉방성능 향상에 관한 연구The Cooling Performance Enhancement of a Variable Speed Heat Pump Using Gas Injection Technique
- Other Titles
- The Cooling Performance Enhancement of a Variable Speed Heat Pump Using Gas Injection Technique
- Authors
- 정민우; 허재혁; 정해원; 김용찬
- Issue Date
- 2009
- Publisher
- 대한설비공학회
- Keywords
- Gas injection(가스인젝션); Cooling performance(냉방성능); Two-stage cycle(2단 사이클); Gas/liquid separator(기액분리기)
- Citation
- 설비공학 논문집, v.21, no.8, pp.425 - 432
- Indexed
- KCI
- Journal Title
- 설비공학 논문집
- Volume
- 21
- Number
- 8
- Start Page
- 425
- End Page
- 432
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/121823
- ISSN
- 1229-6422
- Abstract
- 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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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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