Analysis of a quantum irreversible Otto cycle with exergetic sustainable index

In this study, exergetic sustainability index is applied to quantum irreversible Otto cycle with -1/2 spin system. Exergetic sustainability index in a quantum engine is used first time. This index is the ratio of exergy output (work output for a thermal engine) to total exergetic losses. It gives an...

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Bibliographic Details
Published in:Physica A 2016-07, Vol.453, p.316-326
Main Authors: Dalkıran, Alper, Açıkkalp, Emin, Caner, Necmettin
Format: Article
Language:English
Subjects:
1/2 spin system
Destruction
Engines
Exergetic sustainability index
Exergy
Indexes (ratios)
Irreversibility
Otto cycle
Quantum Otto cycle
Statistical mechanics
Sustainability
Thermodynamics
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Summary:In this study, exergetic sustainability index is applied to quantum irreversible Otto cycle with -1/2 spin system. Exergetic sustainability index in a quantum engine is used first time. This index is the ratio of exergy output (work output for a thermal engine) to total exergetic losses. It gives an opportunity to evaluate for all thermodynamic losses in the system, that is why, it is an important index. In addition, some thermodynamic parameters (work output, exergy destruction, first and second law efficiencies) are considered and their relationships between the exergetic sustainability index are determined. •An irreversible quantum Otto cycle with -1/2 spin system is considered.•Exergetic sustainability index is derived for quantum Brayton cycle.•Calculation are conducted for irreversible cycles.•Numerical results are presented and discussed.
ISSN:0378-4371
1873-2119
DOI:10.1016/j.physa.2016.02.051