制冷学报2024，Vol.45Issue(4)：124-130,7.DOI:10.3969/j.issn.0253-4339.2024.04.124
带喷射器的低温跨临界CO2两级压缩制冷系统性能
Performance of Low-temperature Two-stage Transcritical CO2 Compression Refrigeration System with Ejector
傅兵 1张良 1叶方平 2焦兴蓉 1杨玉麒1
作者信息
- 1. 上海理工大学能源与动力工程学院 上海 200093
- 2. 浙江新劲空调设备有限公司 龙泉 323700
- 折叠
摘要
Abstract
Because of the limited experimental studies on transcritical CO2 refrigeration systems at low evaporating temperatures,an experimental platform of a two-stage transcritical CO2 compression refrigeration system with an ejector was designed and built.We evaluated the performance of the proposed refrigeration system under the following experimental conditions:evaporating temperature within the range of-33 ℃--29 ℃,gas cooler outlet temperature of 30℃-40℃,and high pressure of 8.20 MPa-9.70 MPa.The results show that the variation trend of the experimental results is consistent with that of the theoretical thermodynamic calculation results,and the application of the ejector can significantly improve the performance of the two-stage transcritical CO2 compression refrigeration system.The maximum increase rate of the coefficient of performance(COP)of the refrigeration system by the ejector is 29.37％.Under experimental conditions,the optimal high pressure of the two-stage transcritical CO2 compression refrigeration system with an ejector is 8.80 MPa,and the corresponding optimal COP is 1.63.The cooling capacity and COP of the two-stage transcritical CO2 compression refrigeration system with an ejector increase with increasing evaporating temperature,and the gas cooler outlet temperature significantly affected the performance of the refrigeration system.As the gas cooler outlet temperature increases from 30℃to 40 ℃,the COP of the refrigeration system decreases by 61.4％.The research results provide a reference for research on two-stage transcritical CO2 compression refrigeration systems with ejectors.关键词
跨临界两级压缩/喷射器/低蒸发温度/CO2/制冷性能Key words
two-stage transcritical compression/ejector/low evaporating temperature/CO2/refrigeration performance分类
通用工业技术引用本文复制引用
傅兵,张良,叶方平,焦兴蓉,杨玉麒..带喷射器的低温跨临界CO2两级压缩制冷系统性能[J].制冷学报,2024,45(4):124-130,7.
