21 May 2015 Scaling of dynamic thermoelectric harvesting devices in the 1-100 cm3 range
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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, a scaled-down and a scaled-up prototype are presented. Output energy of 4.1 J per gram of PCM from a typical flight cycle is demonstrated for the scaled-down device, and 3.2 J per gram of PCM for the scaled-up device. The observed performance improvement with scaling down is attributed to the reduction in temperature inhomogeneity inside the PCM. As an application demonstrator for dynamic thermoelectric harvesting devices, the output of a thermoelectric module is used to directly power a microcontroller for the generation of a pulse width modulation signal.
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M. E. Kiziroglou, M. E. Kiziroglou, A. Elefsiniotis, A. Elefsiniotis, N. Kokorakis, N. Kokorakis, S. W. Wright, S. W. Wright, T. T. Toh, T. T. Toh, P. D. Mitcheson, P. D. Mitcheson, U. Schmid, U. Schmid, Th. Becker, Th. Becker, E. M. Yeatman, E. M. Yeatman, } "Scaling of dynamic thermoelectric harvesting devices in the 1-100 cm3 range", Proc. SPIE 9517, Smart Sensors, Actuators, and MEMS VII; and Cyber Physical Systems, 95172F (21 May 2015); doi: 10.1117/12.2181209; https://doi.org/10.1117/12.2181209

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