Effects of Gas Injection on the Heating Performance of a Two-Stage Heat Pump Using a Twin Rotary Compressor with Refrigerant Charge AmountEffects of Gas Injection on the Heating Performance of a Two-Stage Heat Pump Using a Twin Rotary Compressor with Refrigerant Charge Amount
- Other Titles
- Effects of Gas Injection on the Heating Performance of a Two-Stage Heat Pump Using a Twin Rotary Compressor with Refrigerant Charge Amount
- Authors
- 허재혁; 정민우; 전종욱; 김용찬
- Issue Date
- 2008
- Publisher
- 대한설비공학회
- Keywords
- Gas Injection; Two-Stage Cycle; R-410A; Refrigerant Charge; Heat Pump; Gas Injection; Two-Stage Cycle; R-410A; Refrigerant Charge; Heat Pump
- Citation
- International Journal of Air-Conditioning and Refrigeration, v.16, no.3, pp.77 - 82
- Indexed
- KCI
OTHER
- Journal Title
- International Journal of Air-Conditioning and Refrigeration
- Volume
- 16
- Number
- 3
- Start Page
- 77
- End Page
- 82
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/124854
- ISSN
- 2010-1325
- Abstract
- For heat pumps used in a cold region, it is very important to obtain appropriate heating capacity. Several studies using a variable speed compressor and an additional heater have been performed to enhance heating capacity at low ambient temperatures. However, for outdoor temperature conditions below -15oC, it is still difficult to obtain enough heating capacity above the rated value. In recent studies, the application of gas injection technique into a two-stage heat pump yielded noticeable heating performance improvement at low temperature conditions. In this study, the heating performance of a two-stage gas injection heat pump with a rated capacity of 3.5 kW was measured and ana-lyzed by varying refrigerant charge amount and EEV opening at the standard heating condition. The heating performance of the two-stage gas injection heat pump was compared with that of a two-stage non-injection heat pump. The heating capacity and COP of the two-stage gas injection heat pump were improved by 2-10% at the optimal charging condition over those of the two-stage non-injection heat pump.
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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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