AN ECOLOGICAL OPTIMIZATION CRITERION FOR FINITE-TIME HEAT ENGINES
AN ECOLOGICAL OPTIMIZATION CRITERION FOR FINITE-TIME HEAT ENGINES
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DOI：
10.1063/1.347562
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发表时间：
1991-06-01
影响因子：
3.2
通讯作者：
ANGULOBROWN, F
中科院分区：
文献类型：
--
作者：
ANGULOBROWN, F
研究了一种内可逆卡诺式热机，其条件是：无摩擦、工作物质处于内平衡状态（内可逆）、无机械惯性效应、工作流体与热源之间的传热遵循牛顿冷却定律。发现了一类等效率的单参数直线族；即，所有点（发动机配置）属于同一条线具有相同的效率。沿着每条线，输出功率除以熵产生是一个常数。从这些性质出发，利用一些耗散量，得到了可逆功与有限时间功、可逆效率与有限时间效率之间的关系。提出了该热机最佳运行方式的“生态”判据。它包含了一个函数的最大化，这个函数代表了能量与熵产的乘积和冷库温度之间的最佳折衷。相应的效率结果几乎等于卡诺和Curzon和Ahlborn [Am]的平均值。[j] .物理学。43,22（1975）。
An endoreversible Carnot-type heat engine is studied under the usual restrictions: no friction, working substance in internal equilibrium (endoreversibility), no mechanical inertial effects, and under Newton's cooling law for heat transfer between working fluid and heat reservoirs. A monoparametric family of straight lines which is isoefficient is found; i.e., all points (engine configurations) that belong to same line have the same efficiency. Along each line the power output divided by entropy production is a constant. From these properties and by using some dissipated quantities, relationships are obtained between reversible work and finite-time work and between reversible efficiency and finite-time efficiency. An "ecological" criterion is proposed for the best mode of operation of this heat engine. It consists in maximizing a function representing the best compromise between power and the product of entropy production and the cold reservoir temperature. The corresponding efficiency results almost equal to the average of the Carnot and the Curzon and Ahlborn [Am. J. Phys. 43, 22 (1975)] efficiencies.