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Optimal Performance Analysis of a Three-Terminal Thermoelectric Refrigerator with Ideal Tunneling Quantum Dots |
| SU Hao, SHI Zhi-Cheng, HE Ji-Zhou** |
Department of Physics, Nanchang University, Nanchang 330031
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| Cite this article: |
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SU Hao, SHI Zhi-Cheng, HE Ji-Zhou 2015 Chin. Phys. Lett. 32 100501 |
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Abstract The model of a three-terminal thermoelectric refrigerator with ideal tunneling quantum dots is established. It consists of a cavity connected to two quantum dots embedded between two electron reservoirs at different temperatures and chemical potentials. According to the Landauer formula the expressions for the heat current, the cooling rate and the coefficient of performance (COP) are derived analytically. The performance characteristic curves of the cooling rate versus the coefficient of performance are plotted with numerical calculation. The optimal regions of the cooling rate and the COP are determined. Moreover, we optimize the cooling rate and the COP with respect to the position of energy level of the right quantum dot, respectively. The influence of the width of energy level and the temperature ratio on performance of the three-terminal thermoelectric refrigerator is analyzed. Lastly, when the width of energy level is small enough, the optimal performance of the refrigerator is discussed in detail.
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Received: 16 June 2015
Published: 30 October 2015
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| PACS: |
05.70.Ln
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(Nonequilibrium and irreversible thermodynamics)
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85.80.Fi
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(Thermoelectric devices)
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07.20.Mc
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(Cryogenics; refrigerators, low-temperature detectors, and other low-temperature equipment)
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73.63.-b
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(Electronic transport in nanoscale materials and structures)
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