组分可调的冷电联合循环性能分析  

Performance Analysis of Composition Tunable Combined Cooling and Power Cycle

作　　者：孙孝存 舒歌群 石凌峰[1] 田华 王轩[2] 张永浩[1] 孙瑞 SUN Xiaocun;SHU Gequn;SHI Lingfeng;TIAN Hua;WANG Xuan;ZHANG Yonghao;SUN Rui(Department of Thermal Science and Energy Engineering,University of Science and Technology of China,Hefei 230027,China;State Key Laboratory of Engines,Tianjin University,Tianjin 300071,China)

机构地区：[1]中国科学技术大学热科学和能源工程系,合肥230027 [2]天津大学内燃机燃烧学国家重点实验室,天津300072

出　　处：《工程热物理学报》2023年第1期1-7,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51906237/52022066)。

摘　　要：针对并联型冷电联合循环混合工质充注组分无法同时匹配两子循环的问题,基于循环拆分法对其进行剖析,根据拆分所得子循环的性能变化规律,提出了组分调控方法以实现组分和子循环的匹配,并设计了一个理想的组分可调的冷电联合循环系统。计算结果表明,当工质的两相冷凝温度滑移小于冷凝水温升时,适当的过冷可以提高冷凝段的温度匹配,提高循环性能。但受限于调控形式,本文所提出的调控方法仅在较大冷凝水温升和较高制冷量情况下,才能实现冷电联合循环性能的显著提升。Aiming to the problem that initial charge composition of mixture cannot exactly match two sub-cycles of parallel combined cooling and power cycle,cycle splitting analytical method is applied,based on the performance of detached sub-cycles,composition adjustment method is adopted to realize optimal match of working fluid composition and sub-cycles;meanwhile,an ideal composition tunable combined cycle is designed.Results show that proper subcooling can enhance temperature match in condensation process and improve performance of system when temperature glide of mixture in two-phase is less than temperature rise of cooling water.However,restricted to the construction,combined cycle could only achieve a better improvement when temperature rise of cooling water is large and cooling requirement is huge.

关 键 词：冷电联合循环 组分调控 温度匹配 二氧化碳混合工质 

分 类 号：TK123[动力工程及工程热物理—工程热物理]