不可逆布雷森热机循环的生态学优化

An Ecological Optimization of Irreversible Braysson Heat Engine Cycle

以反映热机功率与熵产率之间最佳折衷的“生态学”准则为目标,研究绝热过程不可逆和高低温热源之间存在热漏的不可逆布雷森热机循环模型的优化性能.通过数值计算,给出了热机在最大生态学函数下的优化性能,同时还比较了在最大输出功率、最大效率和最大生态学函数下的热机优化性能参数间的关系,其结论对实际热机的优化设计有一定的理论指导意义.

An irreversible cycle model of a Braysson heat engine is used to investigate the optimal performance of the cycle affected by the irreversible adiabatic processes and the heat leak loss between the heat reservoirs, which takes ecological criterion as objective. The ecological criterion is to make the best compromise between heat engine power output and entropy production rate. By means of numerical calculation, the optimal performance of the heat engine at maximum ecological function is presented. And this paper further compares the related performance parameters at maximum power output,maximum efficiency and maximum ecological function. The conclusions obtained here may provide some theoretical guidance for the optimal design of practical heat engines.