Article

Micro Energy Generation in Different Kinds of Water Flows on Lead Zirconium Titanate/PVDF

Authors:
  • Shri Vishwakarma Skill University, Haryana
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Abstract

Piezoelectric energy is produced using smart piezo materials like Lead Zirconium Titanate/PVDF by the application of dynamic load. This load can be applied using various means like fluid force, impact load etc. In this article, significant research for piezoelectric energy harvesting using flowing fluid force are discussed. Here, the force is applied on patch with in various systems like open channel system, closed channel system; flow through nozzle etc, this force is converted in to electric energy by piezo patch. Piezoelectric materials have been used for sensing and actuating applications at a wide range. The article overviews the different ideas of piezoelectric energy harvesting using hydraulic pressure and provide a potential research work in the field of utilizing fluid vibrational energy.

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Cantilevered flexible plates in axial flow lose stability at sufficiently high flow velocity. Once the instability threshold is exceeded, flutter takes place, and energy is continuously pumped into the plate from the surrounding fluid flow, sustaining the flutter motion. This kind of self-induced, self-sustained vibration can be utilized to extract energy from the fluid flow. This paper studies the energy transfer between the fluid flow and the plate. Then, based on the energy analysis of the fluid–structure interaction system, a new concept of energy-harvesting, the flutter-mill, is proposed in which these flutter motions are utilized to generate electrical power.
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The Energy Harvesting Eel (Eel) is a new device that uses piezoelectric polymers to convert the mechanical flow energy, available in oceans and rivers, to electrical power. Eel generators make use of the regular trail of traveling vortices behind a bluff body to strain the piezoelectric elements; the resulting undulating motion resembles that of a natural eel swimming. Internal batteries are used to store the surplus energy generated by the Eel for later use by a small, unattended sensor or robot. Because of the properties of commercially available piezoelectric polymers, Eels will be relatively inexpensive and are easily scaleable in size and have the capacity to generate from milli-watts to many watts depending on system size and flow velocity of the local environment. A practical Eel structure has been developed that uses the commercially available piezoelectric polymer, PVDF. Future Eels may use more efficient electrostrictive polymer. Every aspect of the system from the interactions between the hydrodynamics of the water flow and structural elements of the Eel, through the mechanical energy input to the piezoelectric material, and finally the electric power output delivered through an optimized resonant circuit has been modeled and tested. The complete Eel system, complete with a generation and storage system, has been demonstrated in a wave tank. Future work on the Eel will focus on developing and then deploying a small, lightweight, one-watt power generation unit, initially in an estuary and then subsequently in the ocean. Such Eels will have the ability to recharge batteries or capacitors of a distributed robotic group, or remote sensor array, thus extending the mission life indefinitely in regions containing flowing water
Meta-heuristics Approaches for the Placement of Piezoelectric actuators/Sensors on a Flexible Cantilever Plate: A Review
  • Neeraj Sehgal
  • Monu Malik
  • Deepak Chhabra
Neeraj Sehgal, Monu Malik, Deepak Chhabra, "Meta-heuristics Approaches for the Placement of Piezoelectric actuators/Sensors on a Flexible Cantilever Plate: A Review" International Journal of Enhanced Research In Science Technology & Engineering, Vol. 3, Issue 6, June,, pp: (7-16),ISSN: 2319-7463, 2014.