摘要
建立了一个考虑热阻、热漏和内不可逆性且热源和工质之间满足牛顿传热规律的不可逆Braysson热机模型。导出了该模型下输出功率、效率和生态学目标函数的表达式。计算了最大输出功率、最大效率和最大生态学目标函数及它们对应的参数值并通过图来反映它们的变化情况。讨论了热漏、内不可逆性对该热机各种性能参数的影响同时给出了一些重要参数的优化范围。所得结果对实际Braysson热机的优化设计提供了理论依据。
An irreversible Braysson heat engine cycle model, in which the heat transfer obeys a linear heat transfer law between the working fluid and the external heat reservoirs, with heat resistance, heat leak and internal irreversibility is established in this paper. The analytical expressions of power output, efficiency and ecological objective function are derived. These performance parameters are maximized with respect to the cycle temperatures along with the isobaric temperature ratio. The maximum power output, efficiency and ecological objective function as well as the corresponding parameters are calculated. The optimal operating regions of the important parameters are determined. Moreover,the influences of heat leak and internal irreversibility on the performance parameters of the heat engine are discussed. The results obtained here may provide some significant guidance for the optimal design and operation of the real Braysson heat engines.
出处
《南昌大学学报（理科版）》
CAS
北大核心
2009年第4期369-373,共5页
Journal of Nanchang University(Natural Science)
基金
国家自然科学基金资助项目(10765004)
