Journal
JOURNAL OF STATISTICAL PHYSICS
Volume 178, Issue 6, Pages 1336-1353Publisher
SPRINGER
DOI: 10.1007/s10955-020-02508-0
Keywords
Variational method; Characteristic curves; Heat engine; Total entropy production
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The study of stochastic thermodynamicmachines is one of themain topics in nonequilibrium thermodynamics. In this study, within the framework of Fokker-Planck equation, and using themethod of characteristics of partial differential equation as well as the variationalmethod, performance of stochastic thermodynamic machines is optimized according to the external potential, with the irreversible work Wirr, or the total entropy production.Stot equivalently, reaching its lower bound. Properties of the optimal thermodynamic machines are discussed, with explicit expressions of upper bounds of work output W, power P, and energy efficiency. are presented. To illustrate the results obtained, typical examples with optimal protocols (external potentials) are also presented.
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