摘要
反问题求解是研究有机朗肯循环发电技术用于回收低品位能源的基础,而跨临界循环能够有效优化循环中换热器内冷热流体温度的匹配,减小系统不可逆损失。综合考虑有机工质的热物性、环保性及安全性,对于423.15K低温热源驱动的跨临界有机朗肯循环,选取R134a、R227ea、R1234ze、R3110、RC318、R236fa 6种工质进行了计算比较。计算采用与热源耦合的反问题思路,求解出工质的运行参数,揭示出参数变化规律并对工质循环性能进行了比较。结果表明,R134a为适合本循环系统的最优工质。
The inverse problem is the foundation of the study of organic Rankine cycle（ORC） power generation technology for the recovery of low-grade thermal energy.Transcritical ORC efficiently optimize the match of hot and cold fluid in heat exchanger,thus decrease the system inreversible loss.Thermal properties,environmental impacts and safety were taken into consideration,R134a,R227ea,R1234ze,R3110,RC318,R236fa were selected as working fluids for the transcritical ORC system with heat source inlet temperature 423.15K.The inverse problem coupling with the heat source was used to compute the operational parameter of the working fluids.The results show variation of the parameter and cycle performance of different working fluids,and prove that R134ais the most suitable fluid for the cycle.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2013年第23期37-43,11,共7页
Proceedings of the CSEE
基金
国家重点基础研究发展计划项目(973项目)(2011CB710703)
国家自然科学基金国际合作项目(51210011)~~
关键词
有机朗肯循环
低温
跨临界
反问题
窄点温差
organic Rankine cycle
low temperature
transcritical
inverse problem
pinch point
