联合动力循环的优化分析

Optimal Analysis on Combined Power Cycle

基于有限时间热力学理论，研究了由两个内可逆卡诺循环构成的无中间热源的联合动力循环的优化性能．首先导出联合循环的输出功率与效率的普遍关系，并由它求出活塞式和定常态流两种联合循环在不同约束条件下的基本优化关系．然后作些有意义的讨论．获得一些重要新结论，同时还指出了有关研究中存在的一些问题．

Based on finite time thermodynamic theory,the optimal performance of a combined power cycle which is formed by two endoreversible Carnot cycles in which there is without any intermediate heat reservoir is studied.First,the general relation between the power output and efficiency of the combined cycle is derived, from which the fundamental optimal relations for both the stable flow and the piston type combined power cycles under different constraint conditions are deduced ,and then,some significant discussions are done,leading to some important new conclusions .Moreover,some errors in the related literatures are pointed out.