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Novel Miniature Airflow Energy Harvester for Wireless Sensing Applications in Buildings

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5 Author(s)
Dibin Zhu ; Sch. of Electron. & Comput. Sci., Univ. of Southampton, Southampton, UK ; Steve P. Beeby ; Michael J. Tudor ; Neil M. White
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This paper presents a novel miniature airflow energy harvester for wireless sensing applications. The energy harvester consists of a wing that is attached to a cantilever spring. The wing oscillates in response to a steady airflow. An electromagnetic transducer is used to extract electrical energy from the airflow-induced oscillations. Both vertical and horizontal orientations are studied. Experiments show that such a generator can operate at airflow speeds as low as 1.5 m·s-1, which compares well to turbines. When the airflow speed is over 2 m·s-1, the average output power exceeds 90 μW, which is sufficient for powering wireless sensor nodes in heat, ventilation, and air conditioning systems in buildings.

Published in:

IEEE Sensors Journal  (Volume:13 ,  Issue: 2 )