Power Engineering

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Browsing Power Engineering by Subject "Autonomous sensor node"

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    Study and Design of Multisource and Battery-free Energy Harvesting Architecture for AHM-Aeronautics Applications
    (Addis Ababa University, 2018-06) Mesfin, Tsegaye; Getachew, Biru (PhD)
    This thesis attempts to study an innovative architecture for an efficient energy generator which powers a wireless sensor network used for Aircraft security Monitoring. This battery-free generator captures energy from its environment due to transient thermal gradients as a main source, and vibrations as a secondary source allowing early biasing of the generator and stores this energy in ultra capacitors. In this way, this multi-source architecture benefits from the synergy between energy scavenging and harvesting: vibration bring low but early and permanent energy. They also contribute to energy harvesting d u ri n g cruise while thermal gradients have vanished. This master’s thesis deals with the development of a power source based on Micro electrical mechanical system thermoelectric generator. The identification of model parameters is based on a measurement with special test bench. The practical implementation of theoretically outlined principles is illustrated on jet engine control unit with the thermoelectric generator for the electric power backup. The conclusion deals with an application of the presented technology in an aircraft-specific field and the associated issues. The proposed power source can be used for supplying of an aircraft-specific autonomous sensor unit. System-level point of view on the autonomous sensor includes the sensor with data acquisition and transmission, energy harvester (thermoelectric generator) with system voltage of 3.3V,power rating of 100mW (corresponds to current consumption about 30mA); continuous operation time: 30min; operating temperature range: -50 °C to +85 °C. Proposed thermoelectric generator provides tens of milliwatts of the electric power on the voltage level of 3.3 V. Various serial/parallel/serial-parallel combinations of 1-4 thermoelectric modules will be tested consequently with a boost or buck boost converter.