Efficiency at maximum power and Optimized efficiency: an information theory approach
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Date
2010-06
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Addis Ababa University
Abstract
We consider a model heat engine which is based on the concepts of information theory,
attributing irreversible energy dissipation to the information transmission channels. The
different communication channels, classical and quantum, are characterized by their channel
capacity. We obtain that the model recovers the Carnot principle in the reversible
limit and the efficiency at maximum power expression of non reversible thermodynamics.
We use optimization criterion to derive the objective function which is a quantity that
help us for the derivation of optimized efficiency. The criterion predicts the performance
regime of the model heat engine lying between efficiency at maximum power and Carnot
efficiency. Such regime should be considered as optimum performance regime of the model
heat engine. We derive the optimized efficiency, which has the same linear term for the
different information channels in the linear response regime, lying between efficiency at
maximum power and Carnot efficiency. We expect the optimization method we used to
be applicable to any finite-time thermodynamic heat engine which meets Hernandez et al
[1] requirements. Besides it gives clue on the study of high performance thermodynamic
heat engine
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Efficiency at maximum power