Energy harvesting investigation of geometrically modified polymer-based piezoelectric thin films

In recent years, Environmental pollution due to human mismanagements and perceiving the dangerous effects of continued use of fossil fuels, such as global warming, has revealed the importance of harvesting energy from natural and renewable resources. The use of piezoelectric materials based on conversion of mechanical energy into electrical energy due to deformation or vibration, is one of the various ways to harvesting energy from renewable resources. This study focuses on geometrically improvement of PVDF-based thin films of piezoelectric energy harvesters. By providing more efficient geometry and determination of the best angle of initial radius of curvature, which maximizes the output voltage (θ = 0.1875 radian), it is practicable to get much more electrical energy output. The investigated piezoelectric energy harvester at the beginning of the study, is single-arc thin films of PVDF and polyimide with initial radius of curvature and its generated output voltage is simulated with constant applied displacement. Disparate harvester geometry’s simulation resulted in different output voltages. The proposed geometry, which eventuates in a large increase of output voltage is ‘S’ shaped double-arc thin films instead of single-arc mode, which results in a significant increase of the output voltage due to more strain distribution in tip areas of thin films. As a result of exerted constant vertical displacement, double-arc thin films mode shows an increase of 133% of the output voltage. In this study by considering the best angle of initial radius of curvature, these two mode have more than 100V difference

کلیدواژه ها:

PVDF thin films ، Modified geometry ، Piezoelectric polymers ، Energy harvesting