Flying with Liquids: Aircraft Thermoelectric Energy Harvesting

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• Dr Tzern Toh, Imperial College London
• Friday 07 March 2014, 11:00-12:00
• EEE Department, Room 611.

If you have a question about this talk, please contact Susan Brace.

Heat storage energy harvesting devices are promising independent power sources for wireless aircraft sensors. These generate energy from the temperature variation in time during flight by using a heat storage unit and a thermoelectric generator. A heat storage unit introduces a delay between changes in the ambient temperature and the surface of a thermoelectric generator. A heat storage thermoelectric energy harvesting system including the power management electronics will be presented. The interface electronics consists of a new cold-starting rectifier topology, a low-dropout regulator and maximum power point tracking boost converter with a battery charging module. As an example of its application, the harvester was designed to supply power to an aircraft wireless strain gauge sensing system. For a temperature variation of +24°C to -27°C and back, spanning 80 minutes, the interface circuit delivers 81 J into a secondary Li-ion battery from a total generated energy of 126 J. This corresponds to a measured average circuit efficiency of 64.3% for this example application.

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