摘要
应用有限时间热力学理论,建立了变温热源内可逆空间闭式简单布雷顿循环模型,导出了功率和热效率的表达式。求解方程得到了最佳低温热源温度,分析了循环的基本性能特性。当总换热器面积一定时,通过优化面积分配比得到了循环的最优性能,由优化低温热源温度进一步得到了双重最大功率。最后,在面积比分配和低温热源温度优化的基础上,对工质和热源间的热容率匹配进行优化,得到了三重最大功率。
In this paper,by using finite time thermodynamics theory,a variable-temperature heat reservoir endoreversible closed simple Brayton cycle model for space power plant is established,and the analytical expressions of power output and thermal efficiency are derived.The optimal low temperature heat sink temperature is obtained by solving the equation,and the basic performance characteristics of the cycle are analyzed.When the total heat exchanger area is fixed,the optimal performance of the cycle is obtained by optimizing the area distribution ratio,and the double maximum power is obtained by optimizing the temperature of the low-temperature heat sink.Finally,on the basis of the optimization of the area ratio distribution and the low temperature heat sink temperature,the thermal capacity rate matching between heat reservoir and working fluid is optimized,and the triple maximum power output is obtained.
作者
王倓
陈林根
戈延林
WANG Tan;CHEN Lingen;GE Yanlin(Institute of Thermal Science and Power Engineering,Wuhan Institute of Technology,Wuhan 430205,China;Hubei Provincial Engineering Technology Research Center of Green Chemical Equipment,Wuhan 430205,China;School of Mechanical&Electrical Engineering,Wuhan Institute of Technology,Wuhan 430205,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2023年第8期2045-2051,共7页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.52171317,No.51779262)
关键词
有限时间热力学
功率
效率
内可逆空间布雷顿循环
性能优化
finite-time thermodynamics
power output
thermal efficiency
endoreversible Brayton cycle for space power plants
performance optimization
