caa a22 4500 445866411 CHVBK 20180317145459.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1140/epjd/e2010-00270-9 doi (NATIONALLICENCE)springer-10.1140/epjd/e2010-00270-9 Stochastic dynamics, efficiency and sustainable power production [Elektronische Daten] [M. Moreau, B. Gaveau, L.S. Schulman] Abstract.: In the framework of stochastic thermodynamics, we give a precise expression of power dissipation in a heat engine, and study the relation between entropy and power dissipation. Using these relations, we propose a reasonable and general definition of efficiency for thermal engines in a non-equilibrium stationary state. This definition, different from Carnot efficiency, seems appropriate to the concerns of sustainable development. We show that non-zero dissipation is necessary for producing non-vanishing power. Furthermore, close to equilibrium and even in much broader situations, when power production is maximum with respect to relevant variables the power dissipation is at less equal to the power delivered to a mechanical, external system, and the corresponding "sustainable efficiency” is at most ½. From this result, we deduce a new upper bound for Carnot efficiency at maximum power. It is compared to similar, but different upper bounds obtained previously by other authors. EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2010 Moreau M. Université Pierre et Marie Curie, Département de Mathémathiques, Tour 16, Boîte 121, 75252, Paris Cedex 05, France aut Gaveau B. Université Pierre et Marie Curie-CNRS, LPTMC (UMR 7600), Boîte 121, 75252, Paris Cedex 05, France aut Schulman L.S. Clarkson University, Dept of Physics, 13699-5820, Potsdam, NY, USA aut The European Physical Journal D Springer-Verlag 62/1(2011-03-01), 67-71 1434-6060 62:1<67 2011 62 10053 https://doi.org/10.1140/epjd/e2010-00270-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epjd/e2010-00270-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Moreau M. Université Pierre et Marie Curie, Département de Mathémathiques, Tour 16, Boîte 121, 75252, Paris Cedex 05, France aut NATIONALLICENCE 700 1- Gaveau B. Université Pierre et Marie Curie-CNRS, LPTMC (UMR 7600), Boîte 121, 75252, Paris Cedex 05, France aut NATIONALLICENCE 700 1- Schulman L.S. Clarkson University, Dept of Physics, 13699-5820, Potsdam, NY, USA aut NATIONALLICENCE 773 0- The European Physical Journal D Springer-Verlag 62/1(2011-03-01), 67-71 1434-6060 62:1<67 2011 62 10053 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer