摘要
建立了存在热阻、热漏、回热损失和机械损失的斯特林热机模型,研究在线性唯象传热定律q∝△(T^(-1))下,热机的轴功率和制动热效率特性,导出了轴功率及制动热效率的表达式,用数值计算分析了热漏、回热损失和机械损失等不可逆因素对热机性能的影响。所得结果可为斯特林热机的优化设计提供一些新的理论指导。
A Stirling heat engine model with heat resistance, heat leak, regenerator losses and mechanical friction losses is established and the shaft power and brake thermal efficiency performance of the engine is analyzed. It is assumed that the heat transfer between the heat reservoirs and the working fluid obeys the linear phenomenological heat transfer law q∞△（T^-1）. The analytical formulae about shaft power and brake thermal efficiency are derived. Detailed numerical examples show the effects of heat leak, regenerator losses and mechanical friction losses on the performance for the engine. The results obtained can provide theoretical instructions for the design and optimization of the Stirling engine.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2009年第4期549-552,共4页
Journal of Engineering Thermophysics
基金
教育部新世纪优秀人才支持计划项目(No.NCET-04-1006)
全国优秀博士论文作者专项资金资助项目(No.200136)
关键词
有限时间热力学
斯特林热机
机械损失
制动热效率
finite time thermodynamics
stirling engine
mechanical friction losses
brake thermal efficiency
