变温热源内可逆中冷回热布雷顿循环功率密度优化

以功率密度为目标，用有限时间热力学的方法，通过数值计算，对变温热源条件下的内可逆中冷回热布雷顿循环的高、低温侧换热器的热导率分配和中间压比、循环总压比和工质与热源间的热容率匹配进行优化。分别得到了最大功率密度、双重最大功率密度和三重最大功率密度，并分析了热力学参数对高低温侧换热器的热导率最优分配、最佳中间压比、最大功率密度和双重最大功率密度的影响。

Power Density Optimization of an Endoreversible Closed Intercooled Regenerated Brayton Cycle Coupled to Variable-temperature Heat Reservoirs

Taking power density as the objective function, the theory of finite time thermodynamics is used in the optimization of the optimal distribution of heat conductance of the hot-and cold-side heat exchangers, the optimal intercooling pressure ratio, the optimal total pressure ratio and the optimal heat capacity ratio between working fluid and heat reservoir of an endoreversible closed intercooled regenerated Brayton cycle coupled to variable-temperature heat reservoirs by using detailed numerical calculation. The maximum power density, the twice-maximum power density and the thrice-maximum power density are obtained by optimizing them. The effects of thermodynamic parameters of the cycle on the optimal distribution of heat conductance of the hot-and cold-side heat exchangers, the optimal intercooling pressure ratio, the optimal total pressure ratio, maximum power density and double-maximum power density are analyzed.