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.