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http://hdl.handle.net/1942/15839
Title: | Efficiency at maximum power of a chemical engine | Authors: | HOOYBERGHS, Hans CLEUREN, Bart SALAZAR, Alberto INDEKEU, Joseph O. VAN DEN BROECK, Christian |
Issue Date: | 2013 | Source: | JOURNAL OF CHEMICAL PHYSICS, 139 (13), p. 134111-1-134111-8 | Abstract: | A cyclically operating chemical engine is considered that converts chemical energy into mechanical work. The working fluid is a gas of finite-sized spherical particles interacting through elastic hard collisions. For a generic transport law for particle uptake and release, the efficiency at maximum power νmp takes the form 1/2 + c μ + O( μ2), with 1/2 a universal constant and μ the chemical potential difference between the particle reservoirs. The linear coefficient c is zero for engines featuring a so-called left/right symmetry or particle fluxes that are antisymmetric in the applied chemical potential difference. Remarkably, the leading constant in νmp is non-universal with respect to an exceptional modification of the transport law. For a nonlinear transport model, we obtain νmp, with θ > 0 the power of μ in the transport equation. | Document URI: | http://hdl.handle.net/1942/15839 | ISSN: | 0021-9606 | e-ISSN: | 1089-7690 | DOI: | 10.1063/1.4821353 | ISI #: | 000325503300011 | Rights: | Copyright (2013) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Chem. Phys. 139, 134111 (2013) and may be found at http://dx.doi.org/10.1063/1.4821353. | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2014 |
Appears in Collections: | Research publications |
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JCP_139_13_134111.pdf | Published version | 519.41 kB | Adobe PDF | View/Open |
arxiv.pdf | 596.08 kB | Adobe PDF | View/Open |
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