Optimal performance of voltage-probe quantum heat engines
- URL: http://arxiv.org/abs/2304.10942v1
- Date: Fri, 21 Apr 2023 13:31:51 GMT
- Title: Optimal performance of voltage-probe quantum heat engines
- Authors: Zahra Sartipi, Javad Vahedi
- Abstract summary: thermoelectric performance at a given output power of a voltage-probe heat engine is investigated in irreversible thermodynamics.
Results show a trade-off between efficiency and output power.
Findings have practical implications for the optimization of realistic heat engines and refrigerators.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The thermoelectric performance at a given output power of a voltage-probe
heat engine, exposed to an external magnetic field, is investigated in linear
irreversible thermodynamics. For the model, asymmetric parameter, general
figures of merit and efficiency at a given output power are analytically
derived. Results show a trade-off between efficiency and output power, and we
recognize optimum-efficiency values at a given output power are enhanced
compared to a B\"uttiker-probe heat engine due to the presence of a
characteristic parameter, namely $d_m$. Moreover, similar to a B\"uttiker-probe
heat engine, the universal bounds on the efficiency are obtained, and the
efficiency at a given output power can exceed the Curzon-Ahlborn limit. These
findings have practical implications for the optimization of realistic heat
engines and refrigerators. By controlling the values of the asymmetric
parameter, the figures of merit, and $d_m$, it may be possible to design more
efficient and powerful thermoelectric devices.
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