不同优化准则下斯特林发动机的性能分析  

Performance analysis of stirling engine with different optimization criteria

作　　者：李亚奇[1] 许行[1] 李海伟[1] 宋鸿杰[1] 

机构地区：[1]第二炮兵工程学院502教研室,陕西西安710025

出　　处：《热科学与技术》2011年第1期63-67,共5页Journal of Thermal Science and Technology

摘　　要：应用有限时间热力学原理,建立了一个考虑热阻、热漏和回热损失等不可逆因素的斯特林发动机模型;推导了最大输出功率、最大效率和生态学优化准则下,斯特林发动机性能的表达式;比较了三种优化准则下,热漏系数和回热器有效性对斯特林发动机性能的影响。研究表明:对热漏损失和回热损失较大的斯特林发动机,宜选用生态学优化准则。为斯特林发动机的优化设计和节能运行提供新的理论指导。An irreversible model for Stirling engine which considers thermal resistance and thermal leakage as well as regenerative heat losses was established by using finite time thermodynamic theory.The expressions of Stirling engine performance were derived by using the maximum output power,maximum efficiency and ecological optimization criterion.And the three optimization criterias were compared under conditions that the heat leak coefficient and heat exchanger effectiveness were considered.The results show that it is better to use ecological optimization criterion for Stirling engine with bigger thermal leakage and regenerative heat losses.The present analysis provides a new theoretical guidance for designing and operating the Stirling engine.

关 键 词：斯特林发动机 有限时间热力学 生态学优化 

分 类 号：TK123[动力工程及工程热物理—工程热物理]