Energy Harvesting ‘Piezo-tree’ Concept
Energy Harvesting ‘Piezo-tree’ Concept. As the leaves move in the wind energy is generated, this is then converted into electric energy. The flapping motion of the leaves is attributed to instability of the aero-elastic system. The “Piezo-tree” has been made using flexible piezoelectric material Polyvinylidene Fluoride (PVDF). The device is able to convert the energy in wind into electric power whilst remaining light, low-cost, and easily scaled. In the prototype, the flexible plate and film are driven to oscillate just as a flag or leaf might flap in the wind. The flapping motion is attributed to instability of the aero-elastic system. When creating the piezo-tree, researches used the flexible piezoelectric material Polyvinylidene Fluoride (PVDF) as the basic component, as it could withstand unpredictable wind strength. The basic design is to clamp one edge of PVDF element to a cylinder bluff body and leave the other edge free. When the wind crosses th...