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

Conference Year

2021

Authors

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%.