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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/15839

Title: Efficiency at maximum power of a chemical engine
Authors: HOOYBERGHS, Hans
SALAZAR, Alberto
INDEKEU, Joseph O.
Issue Date: 2013
Citation: 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.
URI: http://hdl.handle.net/1942/15839
DOI: 10.1063/1.4821353
ISI #: 000325503300011
ISSN: 0021-9606
Category: A1
Type: Journal Contribution
Validation: ecoom, 2014
Appears in Collections: Research publications

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