摘要
蒸气压缩制冷/热泵系统利用气液相变实现热量转移,如何应用气液分离技术对两相工质进行干度调控与流量分配,保证系统运行稳定性并提高系统性能一直是研究的热点。本文综述了蒸气压缩制冷/热泵系统中气液分离技术的研究进展,总结了系统中气液分离技术的应用方式,讨论了不同应用方式中该项技术的主要功能与工作机制,并对重点研究方向进行展望。研究发现气液分离技术的主要功能有保障系统运行可靠性、提高换热器性能、对非共沸混合工质进行组分分离以及改进循环流程等,对气液分离器性能提升方面现有的研究尚有不足,计算流体动力学(CFD)仿真模拟是研究其内部分离机理和对气液分离器进行结构优化的有效方法。气液分离技术应用方式的开发、相分离换热器优化研究与气液分离器的设计优化将会成为今后研究的重点方向。
The vapor compression refrigeration/heat pump systems realize heat transfer by using vaporliquid phase change.The application of vapor-liquid separation technology has always been a research focus,in order to control the degree of dryness and mass flow distribution of the two-phase refrigerant to ensure the stability and improve the performance of the systems.In this paper,the research status of vapor-liquid separation technology in vapor compression refrigeration/heat pump systems is reviewed.The application modes of vapor-liquid separation technology are summarized,the main functions and working mechanisms of different application modes are discussed.Finally,the key research directions are prospected.It is found that the main functions of vapor-liquid separation technology included ensuring the reliability of systems,improving the performance of heat exchangers,separating components of zeotropic mixture refrigerant,and improving the circulation process.However,the existing research is not paid enough attention to the performance improvement of vapor-liquid separators.CFD simulation technology is an effective method to study the internal separation mechanism and optimize the structure of vapor-liquid separators.The development of application modes of vapor-liquid separation technology,the optimization research of phase separation heat exchangers and the design optimization of vapor-liquid separators will become the key research directions in the future.
作者
吴恒
李银龙
晏刚
熊通
张浩
陶骙
WU Heng;LI Yinlong;YAN Gang;XIONG Tong;ZHANG Hao;TAO Kui(School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,Shaanxi,China;Guangdong Midea Air-Conditioning Equipment Company Limited,Foshan 528311,Guangdong,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2023年第3期1129-1142,共14页
Chemical Industry and Engineering Progress
基金
国家自然科学基金(52076160)。
关键词
制冷/热泵系统
气液分离
应用方式
工作机制
性能优化
refrigeration/heat pump system
vapor-liquid separation
application mode
working mechanism
performance optimization
