最大功率密度输出时Atkinson热机的效率

有限时间热力学主要研究循环的最大功率及相应效率。本文则以功率密度——循环输出功率与最大比容之比——作为优化目标分析Ａｔｋｉｎｓｏｎ循环的性能，以兼顾发动机尺寸性能。计算表明最大功率密度输出时循环的效率总是大于最大功率输出时的效率，且前者相应的尺寸参数比后者要小。

Efficiency of an Atkinson Engine at Maximum Power Density

In the studies of finite time thermodynamics, many performance analyses have been carried out concerning the maximum power output and the corresponding efficiency for heat engines. In this paper, instead of just maximizing power for certain cycle, the power density defined as the ratio of power to the maximum specific volume in the cycle, is maximized for an Atkinson engine. Therefore the effects of the engine sizes were included in the analysis. The results showed that the efficiency at the maximum power density is always greater than that at maximum power, and design parameters at the maximum power density lead to smaller and more efficient Atkinson engines.