We consider a quantum endoreversible Carnot engine cycle and its inverse operation–Carnot refrigeration cycle, working between a hot bath of inverse temperature and a cold bath at inverse temperature . For the engine model, the hot bath is constructed to be squeezed, whereas for the refrigeration cycle, the cold bath is set to be squeezed. In the high-temperature limit, we analyze efficiency at maximum power and coefficient of performance at maximum figure of merit, revealing the effects of the times allocated to two thermal-contact and two adiabatic processes on the machine performance. We show that, when the total time spent along the two adiabatic processes is negligible, the efficiency at maximum power reaches its upper bound, which can be analytically expressed in terms of squeezing parameter : , with the Carnot efficiency and the coefficient of performance at maximum figure of merit is bounded from the upper side by the analytical function: , where .
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7 June 2022
Research Article|
June 03 2022
Optimized finite-time performance of endoreversible quantum Carnot machine working with a squeezed bath
Haoguang Liu;
Haoguang Liu
1
Department of Physics, Nanchang University
, Nanchang 330031, China
2
College of Science and Technology, Nanchang Aeronautical University
, Nanchang 332020, China
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Jizhou He;
Jizhou He
1
Department of Physics, Nanchang University
, Nanchang 330031, China
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Jianhui Wang
Jianhui Wang
a)
1
Department of Physics, Nanchang University
, Nanchang 330031, China
3
State Key Laboratory of Surface Physics and Department of Physics, Fudan University
, Shanghai 200433, China
a)Author to whom correspondence should be addressed: wangjianhui@ncu.edu.cn
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a)Author to whom correspondence should be addressed: wangjianhui@ncu.edu.cn
J. Appl. Phys. 131, 214303 (2022)
Article history
Received:
March 12 2022
Accepted:
May 13 2022
Citation
Haoguang Liu, Jizhou He, Jianhui Wang; Optimized finite-time performance of endoreversible quantum Carnot machine working with a squeezed bath. J. Appl. Phys. 7 June 2022; 131 (21): 214303. https://doi.org/10.1063/5.0091215
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