期刊
IEEE TRANSACTIONS ON ELECTRON DEVICES
卷 68, 期 12, 页码 6386-6392出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TED.2021.3122951
关键词
Legged locomotion; Mathematical models; Temperature dependence; Thermoelectric devices; Analytical models; Resistance heating; Energy conversion; Annular thermoelectric generator (TEG); energy conversion efficiency; power series iteration approximation (PSIA) method; temperature-dependent; thermoelectric material (TEM)
资金
- National Natural Science Foundation of China [11872300, 11972285, 11802233]
- Natural Science Foundation of Shaanxi Province, China [2021JZ47]
- Youth Innovation Team of Shaanxi Universities
- Fund of Excellent Doctoral Innovation of Xi'an University of Technology
- Open Subject of State Key Laboratories of Transducer Technology [SKT1506]
This paper investigates the efficiency of annular thermoelectric generators (ATEG) considering temperature-dependent material parameters, proposing a power series iteration approximation (PSIA) method to solve the weak nonlinear thermoelectric coupling equation. The results show that the PSIA solution in the cylindrical coordinate system has high precision and rapid convergence, effectively addressing the impact of temperature-dependent material parameters.
The conversion efficiency of annular thermoelectric generator (ATEG) is studied in consideration of temperature-dependent material parameters based on a 1-D steady model. A power series iteration approximation (PSIA) method is proposed for solving the weak nonlinear thermoelectric coupling equation in the cylindrical coordinate system. The convergence of the solution obtained by PSIA is discussed, and the numerical simulation for the 2-D finite-element model is compared with the PSIA solution. Results show that the obtained approximate solution using the PSIA method in the cylindrical coordinate system has high precision and converges rapidly, and the analytical solution and the numerical solution are in good agreement. For regular Bi2Te3 material, when the material is independent of temperature and is homogeneous, the location of the heat source of the thermoelectric device has no effect on efficiency; when the material is dependent on temperature, the inner cooling and outer heating thermoelectric configuration has a good thermoelectric performance. The energy conversion efficiency of the temperature-dependent TEG is lower than that of the temperature-independent device at an average temperature.
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