【作者】 张文杰；

【导师】 王省哲；

【作者基本信息】 兰州大学 ， 固体力学， 2010， 硕士

【摘要】 近年来,全球性的环境恶化和能源危机正威胁着人类的长期稳定发展,各国政府对绿色环保技术的研究与利用给予了前所未有的关注和支持。热电制冷器是一种无需化学反应的全固态能量转换方式,具有无噪音、体积小、移动方便、使用寿命长等优点,有广泛的应用前景,因而探寻较高热电性能材料以及合理优化热电制冷器结构,从而提高热电制冷器制冷效果成为备受瞩目的焦点。为了方便今后热电制冷器结构的优化设计,避免材料承受过大的应力而发生变形,本文以薄膜式热电制冷器件为例,在对热电材料薄膜进行热分析的基础上,建立弯曲热弹性应力模型,来描述热电材料薄膜内部的热弹性应力分布状态,并分析了影响薄膜内热弹性应力分布的因素。且考虑到热电制冷器件经常工作在航空航天、深海等特殊环境下,将受到自然界电磁场的影响。为验证外界电磁场对半导体制冷片制冷效果的影响,本文构建实验平台,系统测试了在外加电场或外加磁场环境下,半导体制冷片的制冷性能的改变。更多还原

【Abstract】 Recently, global environmental degradation and energy crisis are threatening long-term stable development of mankind. Governments of many countries have given more and more attention and support on green technology research and utilization. Thermoelectric cooler is an energy conversion device without chemical reaction, having wide application for no noise, small size, easy to move and long life. To improve the cooling effect thermoelectric cooler, attentions should be taking on exploring materials with higher thermoelectric properties and optimizing thermoelectric cooler structure rational.In order to optimize the structure of thermoelectric cooler and avoid material deformation because of too much stress, this paper takes thin film thermoelectric cooling device for example, making corresponding thermal analysis firstly. Then establish a bending thermal elastic stress model to analyze the thermal elastic stress state of thermoelectric film material. Finally analyzes the influence of thermal elastic stress under different factors. Taking into account the thermoelectric cooling devices often work in the aerospace, deep-sea or other special circumstances which will be subject to natural electromagnetic fields. To verify the influence of external electromagnetic field on cooling effect, this paper constructs the experimental platform and sisterly tests the cooling performance of thermoelectric cooling device in external electric field or magnetic field environment.更多还原