Computational study of pulse current and thermal stress on thermoelectric cooler

IF 2.3 4区 工程技术 Q2 ENGINEERING, MECHANICAL
N Vijay Krishna, S Manikandan
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Abstract

The thermal performance of a Peltier thermoelectric cooler (TEC) can be enhanced by multi-staging, modifying the geometry of the thermoelement, and using new material with improved thermoelectric properties. This study utilizes COMSOL multiphysics to simulate thermomechanical analyses of various geometries of thermoelectric coolers under pulse current conditions. This investigation explores the influence of pulse current parameters, such as pulse width, pulse ratio, and hot-side convective heat transfer coefficient, on a thermoelectric cooler with different leg geometries. Additionally, the impact of the TEC cold-side temperature, hot-side temperature, and thermal stress on both sides is discussed. The results indicate that TEC leg shapes, such as pin and trapezoid, exhibit the minimum cold-side temperature. Increasing the pulse ratio leads to a decrease in the cold-side temperature and an increase in the hot-side temperature. A notable improvement in the cold-side temperature is also observed with higher pulse ratios, with the pin geometry achieving a minimum cold-side temperature of 276 K. Furthermore, the cooling load affects the temperature on both sides of the TEC. These findings provide valuable insights for optimizing thermoelectric coolers for electronic cooling applications using pulse current methods.
热电冷却器脉冲电流和热应力的计算研究
珀尔帖热电半导体制冷片(TEC)的热性能可以通过多级分段、改变热元件的几何形状以及使用热电特性更好的新材料来提高。本研究利用 COMSOL 多物理场模拟脉冲电流条件下各种几何形状的热电半导体制冷片的热力学分析。本研究探讨了脉冲电流参数(如脉冲宽度、脉冲比和热侧对流传热系数)对不同支脚几何形状的热电冷却器的影响。此外,还讨论了 TEC 冷侧温度、热侧温度和两侧热应力的影响。结果表明,针形和梯形等 TEC 脚形状的冷端温度最低。增加脉冲比会导致冷端温度降低,热端温度升高。此外,冷却负荷也会影响 TEC 两侧的温度。这些发现为利用脉冲电流方法优化电子冷却应用中的热电半导体制冷片提供了宝贵的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.80
自引率
16.70%
发文量
370
审稿时长
6 months
期刊介绍: The Journal of Process Mechanical Engineering publishes high-quality, peer-reviewed papers covering a broad area of mechanical engineering activities associated with the design and operation of process equipment.
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