基于功率密度法分析及优化斯特林热机

Analysis and optimization of Stirling engine based on power density method

应用多变过程来分析斯特林循环性能。以功率密度(循环输出功率与最大比容之比)作为斯特林热机优化目标函数,从而兼顾到热机尺寸参数。通过数值计算将对应于最大功率密度时的参数与对应于最大功率时的同样参数进行了比较,结果发现最大功率密度输出时的循环热效率总是大于最大功率时的热效率,且前者相应的热机尺寸参数比后者要小。

The polytropic processes are used for the performance analysis of Stirling cycle. The power density （the ratio of power to the maximum specific volume） is used as the criterion of Stirling engine optimization. The effects of the engine sizes are concerned in the analysis. The results show that the efficiency of the maximum power density is higher than that of the maximum power, and the former has smaller designed parameters.