布雷顿与斯特林联合循环的热力学性能优化

Thermodynamic optimization for a combined Brayton and Stirling cycles

构建了一个由不可逆布雷顿循环与斯特林循环组成的新型联合循环,用有限时间热力学的方法分析了不可逆布雷顿与斯特林联合循环性能。导出了在牛顿传热律下联合循环无因次功率、效率的解析式,得到了对应于循环最优功率和最优效率的底循环的最佳质量流率;通过数值算例研究了各种参数对联合循环的性能影响。

A combined irreversible Brayton and Stirling cycles was created, the performance of the irreversible combined irreversible Brayton and Stirling cycles was analyzed by using finite - time thermodynamics. The optimal analytical formulae about dimensionless power output, efficiency of the combined irreversible Brayton and Stirling cycles were derived. Corresponding the optimal power output and optimal efficiency, the optimal mass flow rate of bottom cycle was obtained. The influences of various parameters on the dimensionlss power and efficiency were studied by numerical calculations.