文章基本信息

标题：Finite-time thermodynamic analysis for endoreversible Lenoir cycle coupled to constant-temperature heat reservoirs
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作者：Xun Shen ; Lingen Chen ; Yanlin Ge 等
期刊名称：International Journal of Energy and Environment
印刷版ISSN：2076-2895
电子版ISSN：2076-2909
出版年度：2017
卷号：8
期号：3
页码：271-278
出版社：International Energy and Environment Foundation (IEEF)
摘要：A thermodynamic model of a steady-flow endoreversible Lenoir heat engine cycle (a “three point” cycle) coupled to constant-temperature heat reservoirs is established in this paper by using finite time thermodynamic theory. The cycle consists of one isochoric heating branch, one adiabatic expansion branch and one isobaric cooling branch. The analytical formulae about power output and thermal efficiency of the cycle are derived. The optimal performance of the cycle is obtained with the fixed total thermal conductance of heat exchangers. Moreover, the effects of the heat reservoir temperature ratio and the total thermal conductance of heat exchangers on the general and optimal performances are analyzed. The results show that the power and efficiency performance curve of the cycle is a fixed “point” with constant thermal conductance of hot- and cold-side heat exchangers, and there exist optimal thermal conductance distributions, which lead to maximum power and maximum efficiency, respectively, with changeable thermal conductances of hot- and cold-side heat exchangers. Both the power and efficiency will be enhanced with the increase of thermal conductance ratio between high- and low-temperature heat reservoirs, or the total thermal conductance of heat exchangers.