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首页> 外文会议>International Conference on Materials for Renewable Energy and Environment >Feasibility study on applying thermoelectric SiC ceramics for supersonic aerodynamic heat recovery
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Feasibility study on applying thermoelectric SiC ceramics for supersonic aerodynamic heat recovery

机译：超声波空气动力学回收的热电SiC陶瓷应用的可行性研究

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SiC ceramics are widely serving as ceramic composites matrix materials of high-velocity vehicles structures against extremely heating and oxidation for their sustainability at high temperature, and are also high temperature thermoelectric materials, which can transfer heat to electricity by temperature difference. Both of these advantages brought out an idea of generating electricity from aerodynamic heat by thermoelectric SiC structures on supersonic vehicles. A simple nose-tip thermoelectric module is set up, in this work, to predict the thermoelectric performance of SiC ceramics in a supersonic air flow environment (Mach number 3). The flow field parameters, temperature difference and temperature distributions of the module have been simulated by computational fluid dynamics methods. The thermoelectric performance and effect of Thomson heat were discussed. The maximum power output and energy efficiency reaches 0.0027 W and 0.0036 %, respectively, at 230 K temperature difference and a current of 0.122 A. The Thomson heat increases directly with the output current, and at a current above 0.15 A, over 50 % of the generated power has been turned back to thermal heat, resulting in the effective output power as well as energy efficiency decrease rapidly. The thermoelectric efficiency would be increased on higher-speed vehicles by enlarged temperature difference.
机译：作为陶瓷复合材料基质中的高速车辆结构的材料免受极其加热和氧化在高温下它们的可持续性，并且也高温热电材料，其可通过温度差热传递到电力碳化硅陶瓷被广泛地投放。这两个优点超音速车辆通过热电碳化硅结构带出发电的想法从气动热。一个简单的鼻尖端的热电模块被设置，在此工作中，以预测在一个超音速气流环境（马赫数3）碳化硅陶瓷的热电性能。模块的流场参数，温度差和温度分布进行了模拟通过计算流体动力学的方法。汤姆森热的热电性能和效果进行了讨论。的最大功率输出和能量效率达到0.0027 W和0.0036％，分别在230 K温差，并直接与输出电流的0.122 A.汤姆森热的电流增加，并且在高于0.15 A的电流，过50％的所产生的电力被接通回热热量，导致有效输出功率以及能量效率迅速下降。热电效率将在更高速度的车辆通过放大温度差增大。

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