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Dissipative Endoreversible Engine with Given Efficiency

Institut für Physik, Technische Universität Chemnitz, 09107 Chemnitz, Germany
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Entropy 2019, 21(11), 1117; https://doi.org/10.3390/e21111117
Received: 21 October 2019 / Revised: 7 November 2019 / Accepted: 12 November 2019 / Published: 15 November 2019
(This article belongs to the Section Thermodynamics)
Endoreversible thermodynamics is a finite time thermodynamics ansatz based on the assumption that reversible or equilibrated subsystems of a system interact via reversible or irreversible energy transfers. This gives a framework where irreversibilities and thus entropy production only occur in interactions, while subsystems (engines, for instance) act as reversible. In order to give an opportunity to incorporate dissipative engines with given efficiencies into an endoreversible model, we build a new dissipative engine setup. To do this, in the first step, we introduce a more general interaction type where energy loss not only results from different intensive quantities between the connected subsystems, which has been the standard in endoreversible thermodynamics up to now, but is also caused by an actual loss of the extensive quantity that is transferred via this interaction. On the one hand, this allows the modeling of leakages and friction losses, for instance, which can be represented as leaky particle or torque transfers. On the other hand, we can use it to build an endoreversible engine setup that is suitable to model engines with given efficiencies or efficiency maps and, among other things, gives an expression for their entropy production rates. By way of example, the modeling of an AC motor and its loss fluxes and entropy production rates are shown. View Full-Text
Keywords: endoreversible thermodynamics; non-equilibrium thermodynamics; dissipative engine; irreversibilities; efficiency; entropy production endoreversible thermodynamics; non-equilibrium thermodynamics; dissipative engine; irreversibilities; efficiency; entropy production
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Masser, R.; Hoffmann, K.H. Dissipative Endoreversible Engine with Given Efficiency. Entropy 2019, 21, 1117.

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