Efficiency at Maximum Power of Irreversible Engines with Asymmetric Nonlinear Flux–Force Relations

The efficiency at maximum power (EMP) is investigated for classical irreversible thermal or chemical model engines. The heat or particle transport is governed by flux–force relations of the general power-law type. Special attention is given to engines that feature asymmetric transport laws, one for...

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Bibliographic Details
Published in:The journal of physical chemistry. B 2018-04, Vol.122 (13), p.3615-3619
Main Authors: Koning, Jesper, Indekeu, Joseph O
Format: Article
Language:English
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Summary:The efficiency at maximum power (EMP) is investigated for classical irreversible thermal or chemical model engines. The heat or particle transport is governed by flux–force relations of the general power-law type. Special attention is given to engines that feature asymmetric transport laws, one for input (of heat or particles) and a different one for output. It is shown that in a couple of case studies, the EMP of such engines is close to the lowest of the two EMPs that would result for symmetric implementations of the transport laws. As a consequence, ideal efficiency at maximum power is only possible in the model in which both flux–force relations are of step-function type.
ISSN:1520-6106
1520-5207
DOI:10.1021/acs.jpcb.7b10836