制冷学报2024，Vol.45Issue(2)：94-100,7.DOI:10.3969/j.issn.0253-4339.2024.02.094
CO2跨临界制冷系统新型分布式压缩循环研究
Novel Distributed Compression Cycle for Carbon Dioxide Transcritical Refrigeration System
摘要
Abstract
A critical research topic is the improvement of the system performance by efficiently cooling carbon dioxide in transcritical vapor compression cycles.In this study,a distributed compression cycle system(DCCS)is proposed.For the DCCS,the transcritical CO2 from the gas cooler outlet is not further subcooled but boosted.It is then cooled by conventional heat sink conditions.The DCCS performance under different operating conditions with variations in the second boost ratio is calculated by a thermodynamical cycle model.It is shown that the DCCS can effectively improve the system performance compared with the baseline system,with the maximum refrigeration COP increase ranging from 8.2%to 10.76%at a constant gas cooler outlet temperature.The refrigeration capacity is increased up to approximately 26%.The maximum refrigeration COP increase ranges from 8.57%to 13.51%at a constant evaporating temperature.The ideal second boost ratio requirements in DCCS are not high,and the additional system power consumption for the second boost is not more than 20%compared with the baseline system.The DCCS still has advantages in terms of the system COP compared with current systems that only adopt a single subcooling technology.The proposed DCCS provides a new path for improving and refining the performance of the carbon dioxide transcritical vapor compression cycle systems.关键词
分布式压缩/CO2/跨临界/当量过冷/制冷循环Key words
distributed compression/carbon dioxide/transcritical/equivalent subcooling/refrigeration cycle分类
通用工业技术引用本文复制引用
吕亚亚,马国远,王磊..CO2跨临界制冷系统新型分布式压缩循环研究[J].制冷学报,2024,45(2):94-100,7.基金项目
国家重点研发计划(2022YFC3802504)资助项目.(The pro-ject was supported by the National Key R&D Program of China(No.2022YFC3802504).) （2022YFC3802504）
