Study on the Performance of CO2 Two-stage Rotary Compressor in Freezing and Cold Storage Conditions (original) (raw)

• Yusheng Hu, State Key Laboratory of Air-conditioning Equipment and System Energy ConservationFollow
• Huijun Wei, State Key Laboratory of Air-conditioning Equipment and System Energy Conservation
• Jia Xu, State Key Laboratory of Air-conditioning Equipment and System Energy Conservation
• Liping Ren, State Key Laboratory of Air-conditioning Equipment and System Energy Conservation
• Peng Zou, Gree Electric Appliances, Inc

Keywords

CO2, two-stage, freezing, cold storage, performance

Abstract

This paper describes a new type CO2 two-stage rotary compressor for cold storage and freezing of food. A two-stage compression form with an upper cylinder (first-stage) and a lower cylinder (second-stage), unique oil road structures and technical parameters have been used in the rotary compressor to increase the performance. The results indicating that the optimized CO2 two-stage rotary compressor has a significant performance advantage, which the coefficient of performance (COP) increases by 4.4% ~ 6.7%.

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