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A Model to Evaluate the Device-Level Performance of thermoelectric cooler with Thomson Effect Considered

Journal of Thermal Science 2022年第3期31卷 712-726页

作者： GONG Tingrui GAO Lei WU Yongjia TAN Haoshu QIN Feng XIN Xiong SHEN Limei LI Juntao MING Tingzhen Microsystem&Terahertz Research Center China Academy of Engineering PhysicsChengdu610200China Institute of Electronic Engineering China Academy of Engineering PhysicsMianyang621999China School of Civil Engineering and Architecture Wuhan University of TechnologyWuhan430070China Department of Refrigeration&Cryogenics Engineering Huazhong University of Science and TechnologyWuhan430074Chin

In this paper,a one-dimensional thermodynamic model was developed to evaluate the device-level performance of thermoelectric cooler(TEC)with the Thomson effect,contact resistance,gap heat leakage,heat sink,and heat load taken into account.The model was generalized and simplified by introducing dimensionless parameters.Experimental measurements showed good agreement with analytical results.The parametric analysis indicated that the influence of the Thomson effect on cooling capacity continued to expand with increasing current,while the effect on COP hardly changed with current.Low thermal contact resistance was beneficial to obtain lower hot-junction temperature,which can even reduce 2 K compared with the electrical contact resistance in the case study.The gap heat leakage was a negative factor affecting the cooling performance.When the thermal resistance of the heat sink was small,the negative effect of heat leakage on performance would be further enlarged.The enhancement of heat load temperature would increase the cooling power of the TEC.For example,an increase of 5 K in heat load can increase the cooling capacity by about 4%.However,once the current exceeded the optimum value,the raising effect on the cooling power would be weakened.The research can provide an analytical approach for the designer to perform trade studies to optimize the TEC system.

关键词： thermoelectric cooler thermodynamic model Thomson effect contact resistance device-level performance

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A Strategy to Reduce the Peak Temperature of the Chip Working under Dynamic Power Using the Transient Cooling Effect of the Thin-Film thermoelectric cooler

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Journal of Thermal Science 2022年第4期31卷 1094-1105页

作者： WU Yongjia CHEN Sen GONG Tingrui SHI Tianhao ZUO Lei YAN Yonggao FANG Yueping MING Tingzhen School of Civil Engineering and Architecture Wuhan University of TechnologyWuhan 430070China Microsystem&Terahertz Research Center China Academy of Engineering PhysicsChengdu 610200China Department of Mechanical Engineering Virginia TechBlacksburgVA 24060USA State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Energy Construction and Environment Coventry UniversityCoventry CV15FBUK

The thin-film thermoelectric cooler(TEC)is a promising solid-state heat pump that can remove the high local heat flux of chips utilizing the Peltier effect.When an electric current pulse is applied to the thin-film TEC,the TEC can achieve an instantaneous lower temperature compared to that created by a steady current.In this paper,we developed a novel strategy to reduce the peak temperature of the chip working under dynamic power,thus making the semiconductor chip operate reliably and efficiently.A three-dimensional numerical model was built to study the transient cooling performance of the thin-film TEC on chips.The effects of parameters,such as the current pulse,the heat flux,the thermoelement length,the number of thermoelements,and the contact resistance on the performance of the thin-film TEC,were investigated.The results showed that when a current pulse of 0.6 A was applied to the thin-film TEC before the peak power of the chip,the peak temperature of the chip was reduced by more than 10℃,making the thin-film thermoelectric cooler a promising technology for the temperature control of modern chips with high peak powers.

关键词： temperature control transient cooling thermoelectric cooler heat transfer

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Experimental investigation on operating behaviors of loop heat pipe with thermoelectric cooler under acceleration conditions

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Chinese Journal of Aeronautics 2020年第3期33卷 852-860页

作者： Yongqi XIE Xinyu LI Sujun DONG Hongxing ZHANG Hongwei WU School of Aeronautic Science and Engineering Beihang UniversityBeijing 100083China Beijing Key Laboratory of Space Thermal Control Technology China Academy of Space TechnologyBeijing 100094China School of Engineering and Computer Science University of HertfordshireHatfield AL109ABUnited Kingdom

An experimental study was carried out in this article to investigate the transient operating performance of a Dual Compensation Chamber Loop Heat Pipe(DCCLHP) with thermoelectric cooler(TEC) under acceleration conditions and ammonia was selected as the working fluid.For the purpose of comparison, experimental work was conducted under terrestrial gravity.Sensitivity analysis was performed to explore the effect of several control parameters such as the heat load, acceleration magnitude and TEC assist on the startup and operating performance of the DCCLHP.Experimental results indicate that the DCCLHP can get to a steady-state operation when the heat load changes from 25 W to 300 W under terrestrial gravity.While under acceleration conditions, the DCCLHP can work at a high operating temperature or even fail to operate, which shows the acceleration effect plays a significant impact on the loop operation.The TEC assist with power of 10 W can improve the operating performance and reduce the operating temperature for the case of small heat load and acceleration magnitude.When the acceleration exceeds 3 g at large heat load, the effect of TEC assist on the operation at large heat load can be ignored.

关键词： Acceleration Electronic cooling Loop heat pipe Operating performance thermoelectric cooler

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

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Journal of Thermal Science 2021年第4期30卷 1349-1362页

作者： WANG Tianhu WU Haochi GAO Deyang ZHANG Kai MENG Jinghui Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation North China Electric Power UniversityBeijing 102206China School of Energy Power and Mechanical Engineering North China Electric Power UniversityBeijing 102206China State Key Laboratory of Industrial Control Technology Zhejiang UniversityHangzhou 310027China

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

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Diode-pumped single frequency Tm,Ho:YLF laser at room temperature

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Chinese Optics Letters 2005年第8期3卷 463-465页

作者：张新陆鞠有伦王月珠 National Key Laboratory of Tunable Laser Technology Harbin Institute of Technology Science College Harbin Engineering University Harbin 150001 A diode-pumped single frequency TmHo:YLF laser operating at an eye-safe wavelength of 2 μm has been developed. Temperature of the laser crystal was controlled at room temperature with a thermoelectric cooler. The line-width narrowing elements were two solid uncoated fused silica etalons whose thicknesses were 1 and 0.1 mm respectively. Continuous wave single frequency power of 113 mW was obtained

A diode-pumped single frequcncy Tm,Ho：YLF laser operating at an eye-safe wavelength of 2 μm has been developed. Temperature of the laser crystal was controlled at room temperature with a thermoelectric cooler. The line-width narrowing elements were two solid uncoated fused silica etalons whose thicknesses were 1 and 0.1 mm, respectively. Continuous wave single frequency power of 113 mW was obtained.

关键词： Continuous wave lasers Fused silica Holmium Optical pumping Optically pumped lasers Semiconductor lasers Thulium Yttrium compounds Eye safe wavelength Line width narrowing elements Single frequency lasers thermoelectric cooler Tm,Ho:YLF lasers

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