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트윈로터리 압축기 적용 냉방 및 급탕 겸용 이산화탄소 시스템의 성능특성에 관한 연구Performance Characteristics of a CO₂ Cooling and Water Heating System with a Twin-rotary Compressor
- Other Titles
- Performance Characteristics of a CO₂ Cooling and Water Heating System with a Twin-rotary Compressor
- Issue Date
- 2008
- Publisher
- 대한설비공학회
- Keywords
- Transcritical CO₂ cycle(초월임계 이산화탄소 사이클); Water heating system(급탕 시스템); Twin-rotary compressor(트윈로터리 압축기); Compression volume ratio (압축체적비)
- Citation
- 설비공학 논문집, v.20, no.4, pp.230 - 237
- Indexed
- KCI
- Journal Title
- 설비공학 논문집
- Volume
- 20
- Number
- 4
- Start Page
- 230
- End Page
- 237
- ISSN
- 1229-6422
- Abstract
- The objective of this paper is to investigate the performance characteristics of a CO₂ cooling and water heating system using a twin-rotary compressor with the compression volume ratio of 0.6. The cooling performances of the CO₂ heat pump were measured and analyzed with the variations of charge amount, EEV opening, and compressor frequency. In addition, the performance of the combined system including cooling and water heating was also measured and analyzed by varying inlet temperature of the EEV. As a result, the optimal normalized charge and cooling COP in the cooling mode were 0.307 and 2.06, respectively. The application of the water heating into the CO₂ heat pump improved the cooling performance over 78% and decreased the EEV inlet temperature by 8℃, which can increase system reliability.
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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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