Maximum efficiency of low-dissipation heat engines at arbitrary power

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10332054" target="_blank" >RIV/00216208:11320/16:10332054 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1088/1742-5468/2016/07/073204" target="_blank" >http://dx.doi.org/10.1088/1742-5468/2016/07/073204</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1742-5468/2016/07/073204" target="_blank" >10.1088/1742-5468/2016/07/073204</a>

Result language

angličtina

Original language name

Maximum efficiency of low-dissipation heat engines at arbitrary power

Original language description

We investigate maximum efficiency at a given power for low-dissipation heat engines. Close to maximum power, the maximum gain in efficiency scales as a square root of relative loss in power and this scaling is universal for a broad class of systems. For low-dissipation engines, we calculate the maximum gain in efficiency for an arbitrary fixed power. We show that engines working close to maximum power can operate at considerably larger efficiency compared to the efficiency at maximum power. Furthermore, we introduce universal bounds on maximum efficiency at a given power for lowdissipation heat engines. These bounds represent direct generalization of the bounds on efficiency at maximum power obtained by Esposito et al (2010 Phys. Rev. Lett. 105 150603). We derive the bounds analytically in the regime close to maximum power and for small power values. For the intermediate regime we present strong numerical evidence for the validity of the bounds.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BE - Theoretical physics

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Statistical Mechanics: Theory and Experiment

ISSN

1742-5468

e-ISSN

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Volume of the periodical

Neuveden

Issue of the periodical within the volume

July

Country of publishing house

GB - UNITED KINGDOM

Number of pages

15

Pages from-to

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UT code for WoS article

000381379800011

EID of the result in the Scopus database

2-s2.0-85014428851