Achieving Better Super-cooling in a Two-Stage Transient Thermoelectric Device with Constraint-Free Pulse Current by Multi-Objective Optimization  

作　　者：WANG Tianhu WU Haochi GAO Deyang ZHANG Kai MENG Jinghui 

机构地区：[1]Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation,North China Electric Power University,Beijing 102206,China [2]School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China [3]State Key Laboratory of Industrial Control Technology,Zhejiang University,Hangzhou 310027,China

出　　处：《Journal of Thermal Science》2021年第4期1349-1362,共14页热科学学报（英文版）

基　　金：funded by the National Natural Science Foundation of China(No.51706067 and No.51876059);the Fundamental Research Funds for the Central Universities(No.2019MS053)。

摘　　要：As a promising energy conversion technology,transient thermoelectric device has potential applications in temperature control and refrigeration.The performance is sensitive to the applied current pulse.However,the conventional current pulse is limited to regular current shapes,which cannot achieve the best super-cooling performance.There exist strong coupling effects between the parameters of pulse shape,pulse amplitude,and pulse width.Simultaneous optimization of all the variables involved in a current pulse is a prerequisite to further improve the super-cooling.To bridge this gap,a constraint-free current pulse design concept was proposed in this study,which was successfully validated by a multi-objective optimization method.The results show that,the effective cooling regime and temperature overshoot both exhibit excellent features after optimization.Compared with the current t~0(mostly employed in previous studies),the betterments are improved by 88.33%and 92.13%for the effective cooling regime and the temperature overshoot,respectively.The underlying physics reveals that,the appropriate mediation between Peltier cooling,Joule heating,and Fourier conduction effects by a wave-like irregular current pulse is responsible for the improvement.The Pareto-optimal front found in the optimized current shape is beneficial for scientists and engineers to make an appropriate decision towards specific practical application.

关 键 词：thermoelectric cooler transient super-cooling temperature control REFRIGERATION multi-objective optimization 

分 类 号：TB65[一般工业技术—制冷工程]