有机朗肯循环系统的工质选择模拟研究Simulation Study of Working Medium Selection for Organic Rankine Cycle System
谷菁,林达,张海珍,阮炯明
GU Jing,LIN Da,ZHANG Haizhen,RUAN Jiongming
摘要(Abstract)：
根据用于低温余热回收的某ORC(有机朗肯循环)系统的实际工况,基于热力学第一、第二定律采用MATLAB软件和REFPROP数据库建立ORC系统热力学模型,研究4种有机工质对系统热力学性能的影响。结果表明,采用R601a的系统净输出功、热效率和效率最大,系统换热面积、单位净输出功的换热面积和损失最小,且环境污染小,但烃类易燃易爆。R245fa不易燃易爆,且系统净输出功、热效率和效率较大,系统换热面积、单位净输出功的换热面积和损失较小,应用范围更广。得出结论为:应根据实际情况选择适宜的有机工质,该结果为低温ORC系统工质的选择提供了理论依据。
According to the actual working condition of an ORC(organic Rankine cycle) system for low-temperature waste heat recovery, a thermodynamic model of the system was built via MATLAB and REFPROP database based on the first and second laws of thermodynamics to study the impact of four organic working media on thermodynamic performance. The results showed that the net output power, thermal efficiency and exergy efficiency of the system with R601 a were the largest while the heat transfer area, heat transfer area per unit of output work and exergy loss of the system were the smallest with little environmental pollution, but hydrocarbon has the shortcoming of being inflammable and explosive. R245 fa is not inflammable and explosive. The net output power, thermal efficiency and exergy efficiency of the system with R245 fa were relatively large and the heat transfer area, the heat transfer area per unit output work and exergy loss of the system were small. So the application scope of R245 fa is wider. It is concluded that the suitable organic working medium should be selected according to the actual situation, which can be a theoretical basis for low-temperature ORC to choose working media.
关键词(KeyWords)：
低温余热发电;有机朗肯循环;工质选择;数值模拟
low-temperature waste heat power generation;organic Rankine cycle;working medium selection;numerical simulation
基金项目(Foundation):
作者(Author):
谷菁,林达,张海珍,阮炯明
GU Jing,LIN Da,ZHANG Haizhen,RUAN Jiongming
DOI: 10.19585/j.zjdl.202010015
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