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Abstract
A finite time thermodynamic model of the multistage thermoelectric cooler with constant temperature heat source and water-cooled is established, and the calculation method of input power and coefficient of performance (COP) are given. The influence of key parameters on device performance under different working conditions is given. The effects of the working current and cross-sectional area of the thermoelectric unit on refrigerating capacity, COP, thermodynamic perfection, module utilization coefficient, and coordination performance coefficient are analyzed. The results show that there are optimal working currents and optimal cross-sectional area, which can make the performance of the device reach the best. The evaluation index also provides a reference for realizing different goals and optimization.
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