PMID: 22587047May 17, 2012Paper

Irreversibilities and efficiency at maximum power of heat engines: the illustrative case of a thermoelectric generator

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Y ApertetPh Lecoeur

Abstract

Energy conversion efficiency at maximum output power, which embodies the essential characteristics of heat engines, is the main focus of the present work. The so-called Curzon and Ahlborn efficiency η(CA) is commonly believed to be an absolute reference for real heat engines; however, a different but general expression for the case of stochastic heat engines, η(SS), was recently found and then extended to low-dissipation engines. The discrepancy between η(CA) and η(SS) is here analyzed considering different irreversibility sources of heat engines, of both internal and external types. To this end, we choose a thermoelectric generator operating in the strong-coupling regime as a physical system to qualitatively and quantitatively study the impact of the nature of irreversibility on the efficiency at maximum output power. In the limit of pure external dissipation, we obtain η(CA), while η(SS) corresponds to the case of pure internal dissipation. A continuous transition between from one extreme to the other, which may be operated by tuning the different sources of irreversibility, also is evidenced.

References

Dec 31, 2005·Physical Review Letters·C Van den Broeck
Apr 28, 2009·Physical Review Letters·Massimiliano EspositoChristian Van den Broeck
Jan 15, 2011·Physical Review Letters·Massimiliano EspositoChristian Van den Broeck

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Citations

Jun 12, 2012·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Y ApertetPh Lecoeur
Oct 16, 2016·Physical Review. E·C GoupilPh Lecoeur
Jun 13, 2015·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Y IzumidaA Calvo Hernández
Jan 20, 2018·Physical Review. E·Honghui WangJianhui Wang
Jul 15, 2015·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Jianhui WangJizhou He
Nov 22, 2012·Reports on Progress in Physics·Udo Seifert
Sep 28, 2017·Physical Review. E·Y ApertetPh Lecoeur
Dec 9, 2020·Entropy·Christophe Goupil, Eric Herbert
Nov 21, 2020·Physical Review. E·Joydip DasBidhan Chandra Bag
Dec 12, 2012·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Jianhui Wang, Jizhou He
Aug 15, 2014·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Y ApertetPh Lecoeur
Oct 30, 2014·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Z C Tu

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