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  • Title: Work output and efficiency at maximum power of linear irreversible heat engines operating with a finite-sized heat source.
    Author: Izumida Y, Okuda K.
    Journal: Phys Rev Lett; 2014 May 09; 112(18):180603. PubMed ID: 24856684.
    Abstract:
    We formulate the work output and efficiency for linear irreversible heat engines working between a finite-sized hot heat source and an infinite-sized cold heat reservoir until the total system reaches the final thermal equilibrium state with a uniform temperature. We prove that when the heat engines operate at the maximum power under the tight-coupling condition without heat leakage the work output is just half of the exergy, which is known as the maximum available work extracted from a heat source. As a consequence, the corresponding efficiency is also half of its quasistatic counterpart.
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