Performance analysis on power density of an endoreversible Brayton cyc le coupling to variable-temperature heat reservoirs have been performed using fi nite-time thermodynamics.

• 用有限时间热力学方法分析变温热源条件下内可逆布雷顿循环的功率密度特性， 计入工质与高、低温侧换热器的热阻损失，导出功率密度与压比间的解析式。