منابع مشابه
0 N ov 2 00 1 Carnot cycle for an oscillator
Carnot established in 1824 that the efficiency of cyclic engines operating between a hot bath at absolute temperature Thot and a bath at a lower temperature Tcold cannot exceed 1−Tcold/Thot. We show that linear oscillators alternately in contact with hot and cold baths obey this principle in the quantum as well as in the classical regime. The expression of the work performed is derived from a s...
متن کاملs . ed - p h ] 1 6 M ay 2 00 1 Carnot cycle for an oscillator
Carnot established in 1824 that the efficiency of cyclic engines operating between a hot bath at absolute temperature Thot and a cold bath at temperature Tcold cannot exceed 1−Tcold/Thot. This result implies the existence of an entropy function S(U) with the property that dS/dU ≤ 0, where U denotes the average energy. Linear singlemode systems alternately in contact with hot and cold baths obey...
متن کاملNonlinear Thermodynamic Analysis and Optimization of a Carnot Engine Cycle
Michel Feidt 1, Monica Costea 2,*, Stoian Petrescu 2 and Camelia Stanciu 2 1 Laboratoire d'Énergétique et de Mécanique Théorique et Appliquée, UMR 7563, Université de Lorraine, 2, avenue de la Forêt de Haye, Vandoeuvre-lès-Nancy 54518, France; [email protected] 2 Department of Engineering Thermodynamics, University Politehnica of Bucharest, Splaiul Independentei 313, Bucharest 06004...
متن کاملCarnot cycle at finite power: attainability of maximal efficiency.
We want to understand whether and to what extent the maximal (Carnot) efficiency for heat engines can be reached at a finite power. To this end we generalize the Carnot cycle so that it is not restricted to slow processes. We show that for realistic (i.e., not purposefully designed) engine-bath interactions, the work-optimal engine performing the generalized cycle close to the maximal efficienc...
متن کاملMolecular kinetic analysis of a finite-time Carnot cycle
We study the efficiency at the maximal power ηmax of a finite-time Carnot cycle of a weakly interacting gas which we can regard as a nearly ideal gas. In several systems interacting with the hot and cold reservoirs of the temperatures Th and Tc, respectively, it is known that ηmax = 1− √ Tc/Th which is often called the Curzon-Ahlborn (CA) efficiency ηCA. For the first time numerical experiments...
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ژورنال
عنوان ژورنال: European Journal of Physics
سال: 2002
ISSN: 0143-0807
DOI: 10.1088/0143-0807/23/5/306