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Title: | Carnot cycle at finite power: Attainability of maximal efficiency |
Authors: | Allahverdyan, A. E. Hovhannisyan, K. V. Melkikh, A. V. Gevorkian, S. G. |
Issue Date: | 2013 |
Citation: | Carnot cycle at finite power: Attainability of maximal efficiency / A. E. Allahverdyan, K. V. Hovhannisyan, A. V. Melkikh [et al.] // Physical Review Letters. — 2013. — Vol. 111. — № 5. |
Abstract: | 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 efficiency has a long cycle time and hence vanishing power. This aspect is shown to relate to the theory of computational complexity. A physical manifestation of the same effect is Levinthal's paradox in the protein folding problem. The resolution of this paradox for realistic proteins allows to construct engines that can extract at a finite power 40% of the maximally possible work reaching 90% of the maximal efficiency. For purposefully designed engine-bath interactions, the Carnot efficiency is achievable at a large power. © 2013 American Physical Society. |
Keywords: | CARNOT EFFICIENCY LARGE POWER LONG CYCLE TIME PROTEIN FOLDING PROBLEM VANISHING POWER CARNOT CYCLE ENGINES THERMAL CYCLING EFFICIENCY |
URI: | http://elar.urfu.ru/handle/10995/26832 |
SCOPUS ID: | 84881534644 |
WOS ID: | 000322777400001 |
PURE ID: | 893381 |
ISSN: | 0031-9007 1079-7114 |
DOI: | 10.1103/PhysRevLett.111.050601 |
Appears in Collections: | Научные публикации ученых УрФУ, проиндексированные в SCOPUS и WoS CC |
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