Maximum efficiency of low-dissipation heat engines at arbitrary power

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Maximum efficiency of low-dissipation heat engines at arbitrary power

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Maximum efficiency of low-dissipation heat engines at arbitrary power

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BE - Teoretická fyzika

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Journal of Statistical Mechanics: Theory and Experiment

ISSN

1742-5468

e-ISSN

—

Svazek periodika

Neuveden

Číslo periodika v rámci svazku

July

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

—

Kód UT WoS článku

000381379800011

EID výsledku v databázi Scopus

2-s2.0-85014428851