?? 2016, Springer-Verlag Berlin Heidelberg.Aircraft sensors are typically cable powered, imposing a significant weight overhead. The exploitation of temperature variations during flight by a phase change material (PCM) based heat storage thermoelectric energy harvester, as an alternative power source in aeronautical applications, has recently been flight tested. In this work, the applicability of this technology to use cases with smaller and larger size specifications is studied by fabrication, testing and analysis of a scaled-down and a scaled-up prototype. Output energy of 4.1??J/g of PCM from a typical flight cycle is demonstrated for the scaled-down device, and 2.3??J/g of PCM for the scaled-up device. The higher energy density of the scaled down prototypes is attributed to the reduction in temperature inhomogeneity inside the PCM. The impact of super-cooling on performance is analyzed by employing a simulation model extended to include super-cooling effects. It is found that super-cooling may be beneficial for scaling down, in applications with slow temperature fluctuations.
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机译：?? 2016年，柏林海德堡Springer-Verlag，飞机传感器通常由电缆供电，因此重量开销很大。基于相变材料（PCM）的储热热电能量收集器在飞行过程中利用温度变化作为航空应用中的替代动力，最近已经进行了飞行测试。在这项工作中，通过按比例缩小和按比例放大的原型的制造，测试和分析，研究了该技术在大小规格越来越大的用例中的适用性。对于缩小的设备，典型飞行周期的输出能量为4.1 ?? J / g PCM，对于放大的设备，输出能量为2.3 ?? J / g PCM。按比例缩小的原型的较高能量密度归因于PCM内部温度不均匀性的降低。通过采用扩展为包括过冷效应的仿真模型来分析过冷对性能的影响。已经发现，在温度波动缓慢的应用中，过冷可能有利于缩小尺寸。
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