A dual system piezoelectric energy harvester for harvesting low frequency ocean energy

Abstract

This paper presents a dual system hybrid piezoelectric energy harvester (DS-PEH) for harvesting ocean energy. The lever module can amplify the external load; the dual system hybrid power generation is adopted, increasing the output power compared to the single power generation mode. The experiment examines the impact of two variables on various systems. At a flow rate of 18 000 L h⁻¹, PEH-1 generates 36.98 μW with a 15 mm rubber band and 2 MΩ resistance, while PEH-2 produces 28.09 μW with a 20 mm magnet spacing and 1 MΩ resistance. The two systems can light up a light-emitting diode (LED) separately and have the potential to power small equipment. Moreover, the DS-PEH can be expanded to large-scale offshore power generation systems by integrating multiple prototypes according to different working conditions.