Browsing by Author "Worku, Solomon"
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Item Efficiency at maximum power and Optimized efficiency: an information theory approach(Addis Ababa University, 2010-06) Worku, Solomon; Bekele, Mulugeta (PhD)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