基于主动气液调配的混合工质换热匹配重构  

Reconstructing Heat Exchange Matching for Zeotropic Mixtures Based on Active Vapor-liquid Adjustment

作　　者：李俊杰 陈健勇[1] 陈颖 罗向龙[1] 何嘉诚 梁颖宗 杨智 LI Junjie;CHEN Jianyong;CHEN Ying;LUO Xianglong;HE Jiacheng;LIANG Yingzong;YANG Zhi(School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学材料与能源学院,广州510006

出　　处：《工程热物理学报》2024年第12期3594-3602,共9页Journal of Engineering Thermophysics

基　　金：广东省基础与应用基础研究基金自然科学基金(No.2022A1515012035);高校教师特色创新研究项目(No.2021JNHB07)。

摘　　要：非共沸混合工质在相变过程中具有温度滑移特性,与冷热源变温过程形成换热匹配,但其温焓非线性使得完美匹配无法实现,造成了换热不可逆损失。基于非共沸混合工质温焓特性和主动气液调配原理,本文对非共沸混合工质的换热匹配进行重构。依据耗散得出换热过程不可逆损失与质量流量和等效比热容的关系,分液导致工质换热曲线斜率增加,配液引起工质温度降低。构建了主动气液调配换热模型,并开展了单目标和多目标优化,发现主动气液调配可减少R170/R290工质8.7%的总耗散率和9.7%的换热面积,实现了换热不可逆损失减少的同时传热性能提升。Zeotropic mixtures has temperature glide characteristics during phase transition,leading to a matching with the temperature variation of heat or cold sources.However,the nonlinear of temperature-enthalpy relationship disables the perfect matching,resulting in large irreversibility in heat exchange.Base on the thermodynamic properties of zeotropic mixtures and the principle of active vapor-liquid adjustment,this paper proposes to reconstruct heat exchange matching for zeotropic mixture.According to entransy analysis,the irreversibility during the heat exchange process is correlated with mass fow rate and equivalent specific heat capacity.Liquid-separation leads to an increased slope of refrigerant heat exchange curve,while liquid reflling causes a reduction in temperature.The heat exchange model featured with active vapor-liquid adjustment is built.Both single-objective and multi-objective optimizations are conducted.The results show that active vapor-liquid adjustment can reduce the total entransy dissipation rate by 8.7%and heat exchange area by 9.7%when working with R170/R290.This confirms the reduction in irreversibility and enhancement of heat transfer performance simultaneously.

关 键 词：主动气液调配 非共沸混合工质 非线性 换热匹配 强化传热 

分 类 号：TK123[动力工程及工程热物理—工程热物理]