Efficiency at and near maximum power of low-dissipation heat engines

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10318371" target="_blank" >RIV/00216208:11320/15:10318371 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1103/PhysRevE.92.052125" target="_blank" >http://dx.doi.org/10.1103/PhysRevE.92.052125</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevE.92.052125" target="_blank" >10.1103/PhysRevE.92.052125</a>

Result language

angličtina

Original language name

Efficiency at and near maximum power of low-dissipation heat engines

Original language description

A universality in optimization of trade-off between power and efficiency for low-dissipation Carnot cycles is presented. It is shown that any trade-off measure expressible in terms of efficiency and the ratio of power to its maximum value can be optimized independently of most details of the dynamics and of the coupling to thermal reservoirs. The result is demonstrated on two specific trade-off measures. The first one is designed for finding optimal efficiency for a given output power and clearly reveals diseconomy of engines working at maximum power. As the second example we derive universal lower and upper bounds on the efficiency at maximum trade-off given by the product of power and efficiency. The results are illustrated on a model of a diffusion-based heat engine. Such engines operate in the low-dissipation regime given that the used driving minimizes the work dissipated during the isothermal branches. The peculiarities of the corresponding optimization procedure are reviewed and

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

2015

Confidentiality

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

Name of the periodical

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics

ISSN

1539-3755

e-ISSN

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Volume of the periodical

92

Issue of the periodical within the volume

5

Country of publishing house

US - UNITED STATES

Number of pages

12

Pages from-to

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UT code for WoS article

000364906400001

EID of the result in the Scopus database

2-s2.0-84949255556