传热规律对卡诺热机性能的影响

INFLUENCE OF HEAT TRANSFER LAW ON THE PERFORMANCE OF A CARNOT ENGINE

自从Curzon和Ahlborn于1975年导出工作于T_H、T_L热源间卡诺热机最大功率输出时的效率界限η_m=η_(CA)=1—(T_L/T_H)^(0.5)以来,已有百余篇文献研究了热机有限时间热力学问题,除了极少数文献外,其余工作多以线性传热定律为基础进行研究。本文进一步导出两种非线性传热规律时卡诺热机的最优性能。

This paper derives the relation between power output and optimal thermal efficiency of a Carnot engine with two different irreversible nonlinear heat transfer Laws. The bounds of efficiency at maximum power output are given also. The results involve some obtained before.