A novel super-cooling enhancement method for a two-stage thermoelectric cooler using integrated triangular-square current pulses

被引:36
作者
Meng, Jing-Hui [1 ,2 ]
Wu, Hao-Chi [3 ]
Gao, De-Yang [1 ]
Kai, Zhang [1 ,2 ]
Lu, Gui [2 ,4 ]
Yan, Wei-Mon [5 ]
机构
[1] North China Elect Power Univ, Beijing Key Lab Emiss Surveillance & Control Ther, Beijing 102206, Peoples R China
[2] North China Elect Power Univ, Sch Energy Power & Mech Engn, Beijing 102206, Peoples R China
[3] Zhejiang Univ, State Key Lab Ind Control Technol, Hangzhou 310027, Peoples R China
[4] North China Elect Power Univ, Minist Educ, State Key Lab Ind Control Technol, Beijing 102206, Peoples R China
[5] Natl Taipei Univ Technol, Dept Energy & Refrigerating Air Conditioning Engn, Taipei 10608, Taiwan
基金
中国国家自然科学基金;
关键词
Thermoelectric cooler; Super-cooling; Performance improvement; Multi-objective; Optimization; PERFORMANCE; MODULE; POWER;
D O I
10.1016/j.energy.2020.119360
中图分类号
O414.1 [热力学];
学科分类号
摘要
In this work, a novel concept of continuous cooling has been proposed to enhance the super-cooling performance of a two-stage thermoelectric cooler, in which integrated triangular-square pulses are used with their modes separately controlled in the upper and lower stages. The 3-dimensionl modeling of the thermoelectric cooler is developed to simulate the super-cooling performance. The non-dominated Sorting Genetic Algorithm II (NSGA-II) is adopted to perform the multi-parameters optimization of pulses forms, in which twelve influencing parameters including pulse amplitude and width, several time constants such as the interval time and input time of pulses are selected as the searching variables, and maximum effective cooling zone with minimum overshoot temperature is set as the multi objective function. The optimal designs are proved to be better in super-cooling performance for both constant and variable leg cross-sectional area, owing to their well mutual cooperation of the upper and lower stage pulses. Compared to the conventional design with completely identical imposed current form, the effective cooling zone can be improved up to 72.41% by the optimal design when the cooling load is fixed at 0 kW m-2, and the corresponding temperature overshoot can be decreased by 56.48% from 20.29 K to 8.83 K. (C) 2020 Elsevier Ltd. All rights reserved.
引用
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页数:12
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