Efficiency at Maximum Power of Low-Dissipation Carnot Engines

被引：453

作者：

Esposito, Massimiliano ^{[1
]}

Kawai, Ryoichi ^{[2
]}

Lindenberg, Katja ^{[3
,4
]}

Van den Broeck, Christian ^{[5
]}

机构：

[1] Univ Libre Bruxelles, Ctr Nonlinear Phenomena & Complex Syst, B-1050 Brussels, Belgium

[2] Univ Alabama, Dept Phys, Birmingham, AL 35294 USA

[3] Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA

[4] Univ Calif San Diego, BioCircuits Inst, La Jolla, CA 92093 USA

[5] Hasselt Univ, B-3590 Diepenbeek, Belgium

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 15期

关键词：

HEAT ENGINES; THERMODYNAMICS; CYCLE;

D O I：

10.1103/PhysRevLett.105.150603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the efficiency at maximum power, eta*, of engines performing finite-time Carnot cycles between a hot and a cold reservoir at temperatures T(h) and T(c), respectively. For engines reaching Carnot efficiency eta(C) = 1 - T(c)/T(h) in the reversible limit (long cycle time, zero dissipation), we find in the limit of low dissipation that eta* is bounded from above by eta(C)/(2 - eta(C)) and from below by eta(C)/2. These bounds are reached when the ratio of the dissipation during the cold and hot isothermal phases tend, respectively, to zero or infinity. For symmetric dissipation (ratio one) the Curzon-Ahlborn efficiency eta(CA) = 1 - root T(c)/T(h) is recovered.

引用

页数：4

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