摘要
应用有限时间热力学理论建立了考虑外部热源与循环工质之间的传热损失、内不可逆性损失和循环总换热面积一定时的亚临界简单不可逆有机朗肯循环模型;采用R245fa作为循环工质,由优化换热器面积分配对循环的输出功率和热效率进行了优化,分析了输出功率和热效率之间的关系和工质泵/膨胀机的不可逆性对输出功率和热效率的影响。
A subcritical simple irreversible organic Rankine Cycle model considering heat transfer loss between heat reservoir and working fluid,internal irreversible losses and the fixed total heat exchange surface area is established by using finite time thermodynamic theory.Using R245fa as working fluid,the net power output and thermal efficiency of the subcritical simple irreversible Organic Rankine Cycle are optimizing the heat exchanger surface area.The relationship between the net power output and thermal efficiency,as well as the effects of the irreversible losses of the working fluid pump and the expander on the net power output and thermal efficiency are analyzed.
出处
《节能》
2018年第7期60-64,共5页
Energy Conservation
基金
国家自然科学基金项目(项目编号:51576207)
国家重点研发项目(项目编号:2017YFB0603503)
关键词
有限时间热力学
亚临界简单不可逆有机朗肯循环
内不可逆性
输出功率
热效率
finite time thermodynamics
subcritical simple irreversible organic Rankine Cycle
internal irreversible loss
power
efficiency
