Elastic Floating Unit With Piezoelectric Device for Harvesting Ocean Wave Energy

2012 ◽  
Author(s):  
Hidemi Mutsuda ◽  
Ryuta Watanabe ◽  
Masato Hirata ◽  
Yasuaki Doi ◽  
Yoshikazu Tanaka
Keyword(s):  
Electric Power ◽  
Wave Energy ◽  
Bluff Body ◽  
Electrical Energy ◽  
Ocean Wave ◽  
Breaking Wave ◽  
Piezoelectric Device ◽  
Ocean Wave Energy ◽  
Floating Type ◽  
Better Than

The purpose of this study is to improve FPED (Flexible PiEzoelectric Device) we have developed. The FPED consisting of piezo-electric polymer film (PVDF) is a way of harvesting electrical energy from ocean power, e.g. tide, current, wave, breaking wave and vortex. We also propose an Elastic Floating unit with HAanging Structures (EFHAS) using FPED. The EFHAS consists of floating unit and hanging unit. In this study, we investigated electric performance of FPED and EFHAS and also modified internal structure of FPED to increase electrical efficiency. As a result, Electric performance is increasing with increasing number of PVDFs laminated in FPED. Multilayer type of FPED can rapidly increase electric efficiency. Electric power can be improved by FPED attached a bluff body with relative density. Electric performance of floating type for floating unit of EFHAS is better than that of submerged type. Distance L/λ = 0.4 between floaters of floating unit is suitable for highly electric performance. In hanging unit of EFHAS, it is possible to increase electric power per unit area with increasing number of stairs. In conclusion, we showed the EFHAS with the FPED could be useful for harvesting ocean wave energy.

Ocean Power Generator Using Flexible Piezoelectric Device

2013 ◽  
Author(s):  
Hidemi Mutsuda ◽  
Ryuta Watanabe ◽  
Shota Azuma ◽  
Yoshikazu Tanaka ◽  
Yasuaki Doi
Keyword(s):  
Electric Power ◽  
Wave Breaking ◽  
Strain Energy ◽  
Electrical Energy ◽  
Electric Polarization ◽  
Scale Model ◽  
Breaking Wave ◽  
Ocean Energy ◽  
Power Generator ◽  
Piezoelectric Device

We have developed a way of harvesting electrical energy from ocean power, e.g. tide, current wave, breaking wave and vortex, using a Flexible PiezoElectric Device (FPED) consisting of polyvinyledene fluoride (PVDF) and elastic material such as rubber, silicon and resin. The proposed FPED has a multi-layered structure with a distance δ between FPEDs located away from centerline of the FPED. When the FPED can be easily deformed by ocean power, the PVDF laminated in the FPED can be expanded and compressed and then the internal strain energy can be stored in the FPED. The electric power is generated when the electric polarization occurs in the PVDF. In this study, we have proposed an ocean power generator of EFHAS (Elastic Floating unit with HAnging Structures) consisting of floating unit and hanging unit using the FPEDs to obtain electric power from ocean energy. We investigated a structure of the EFHAS and also examined characteristics of motion and electric performance of the EFHAS (1/50–1/75 scale model. We made clear that the EFHAS could be useful as ocean power generator.

Hydrocavitation piezoelectric ocean wave energy harvesting

2021 ◽  
pp. 1-10
Author(s):  
Francisco Arias ◽  
Salvador De Las Heras
Keyword(s):  
Wave Energy ◽  
Low Cost ◽  
Electrical Energy ◽  
Ocean Waves ◽  
Ocean Wave ◽  
Mechanical Parts ◽  
Energy Harvesters ◽  
Ocean Wave Energy ◽  
Piezoelectric Layers ◽  
Local Pressures

Abstract The possibility to convert the ocean wave energy into electrical energy by piezoelectric layers has excited the imagination of ocean wave energy conversion designers for decades owing to its relative robustness (no mechanical parts are needed), the capability to cover large areas and its relative low cost. Unfortunately, the very poor efficiency featured by piezoelectric layers in application of ocean waves has prevented its application even as energy harvester. Here, the possibility to induce hydrocavitation and then working with more higher local pressures for substantial efficiency enhancement is discussed. Utilizing a simplified geometrical and physical model and the linear and potential theory, a first theoretical estimation for the energy enhancement driven by hydrocavitation was calculated. It was found that the power could be enhanced several orders of magnitude which, although still rather low, however, the enhanced electric outputs can be used now as energy harvesters. Additional R&D is encouraged in order to explore the possibilities to harness hydrocavitation to enhance piezoelectric converters.

A Technology of Electrical Energy Generated From Ocean Power Using Flexible Piezoelectric Device

2010 ◽  
Author(s):  
Hidemi Mutsuda ◽  
Kenta Kawakami ◽  
Takayuki Kurokawa ◽  
Yasuaki Doi ◽  
Yoshikazu Tanaka
Keyword(s):  
Bluff Body ◽  
Electric Energy ◽  
Electrical Energy ◽  
Energy System ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Breaking Wave ◽  
Ocean Energy ◽  
Floating Platform ◽  
Piezoelectric Device

We have developed a way of harvesting electrical energy from the ocean power, e.g. tide, current, wave, breaking wave and vortex, using a flexible piezoelectric device consisting of piezo-electric polymer film (PVDF), silicon and natural rubber. The flexible piezoelectric device (FPED) is a hydro-electric ocean energy converter designed to convert renewable energy harnessed from ocean energy into usable electricity. The basic concept generating electric power using FPED is to utilize fluid structure interaction, e.g. flattering, flapping and periodic bending, caused by ocean energy. The FPED deformed by kinetic energy of the ocean power stores elastic energy and also converts it to the electric energy. We carried out some experiments using wave tank and the water tunnel with a bluff body. We have confirmed the electricity generated by wave, current and vortex using the FPED. The developed FPED could be a new technology of harvesting electrical energy from the ocean power. A floating platform attached FPED could be coupled with an offshore wind turbine as a hybrid energy system in ocean space.

Exploiting of Ocean Wave Energy

2012 ◽  
Vol 622-623 ◽  
pp. 1143-1146
Author(s):  
Cheng Shao ◽  
Xao Yu Yuan
Keyword(s):  
Wave Energy ◽  
Electrical Energy ◽  
Energy Carrier ◽  
Ocean Wave ◽  
Sea Waves ◽  
Energy Research ◽  
Power Sources ◽  
Renewable Power ◽  
Ocean Wave Energy ◽  
Scientists And Engineers

Sea waves are a very promising energy carrier among renewable power sources, and so many devices to convert wave energy into electrical energy have been invented. This paper discussed the fundamentals of ocean wave energy, summarized the wave energy research being conducted. And the purpose is to take refers to scientists and engineers in this area.

scholarly journals Recent advances in ocean wave energy harvesting by triboelectric nanogenerator: An overview

2020 ◽  
Vol 9 (1) ◽  
pp. 716-735
Author(s):  
Bin Huang ◽  
Pengzhong Wang ◽  
Lu Wang ◽  
Shuai Yang ◽  
Dazhuan Wu
Keyword(s):  
Energy Harvesting ◽  
Wave Energy ◽  
Water Wave ◽  
Modern Society ◽  
Electrical Energy ◽  
Ocean Wave ◽  
Triboelectric Nanogenerator ◽  
Ocean Wave Energy ◽  
Recent Advances ◽  
And Performance

AbstractA sustainable power source is more and more important in modern society. Ocean wave energy is a very promising renewable energy source, and it is widely distributed worldwide. But, it is difficult to develop efficiently due to various limitations of the traditional electromagnetic generator. In recent years, the newly developed triboelectric nanogenerator (TENG) provides an excellent way to convert water wave energy into electrical energy, which is mainly based on the coupling between triboelectrification and electrostatic induction. In this paper, a review is given for recent advances in using the TENG technology harvesting water wave energy. We first introduce the four most fundamental modes of TENG, based on which a range of wave energy harvesting devices have been demonstrated. Then, these applications’ structure and performance optimizations are discussed. Besides, the connection methods between TENG units are also summarized. Finally, it also outlines the development prospects and challenges of technology.

scholarly journals Natural rubber for sustainable high-power electrical energy generation

RSC Advances ◽  
2014 ◽  
Vol 4 (53) ◽  
pp. 27905-27913 ◽  
Author(s):  
Rainer Kaltseis ◽  
Christoph Keplinger ◽  
Soo Jin Adrian Koh ◽  
Richard Baumgartner ◽  
Yu Feng Goh ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Wave Energy ◽  
High Power ◽  
Renewable Resources ◽  
Electrical Energy ◽  
Energy Generation ◽  
Ocean Wave ◽  
Ocean Wave Energy ◽  
Electrical Energy Generation

Sustainable natural rubber for soft generators opens up new possibilities for harvesting renewable resources. With this technology, ocean wave energy could become a cheap and clean resource for generation of electricity.

scholarly journals Contemporary and Practicable Technique to Produce Electricity using Waves

2019 ◽  
Vol 8 (6S3) ◽  
pp. 1329-1333
Keyword(s):  
Renewable Energy ◽  
Wave Energy ◽  
Mechanical Energy ◽  
Research Work ◽  
Electrical Energy ◽  
Ocean Waves ◽  
Ocean Wave ◽  
Energy Technologies ◽  
Ocean Wave Energy ◽  
Main Components

Ocean waves are huge, large untapped energy resources and the potential for extracting energy from waves is considerable. Ocean wave energy can play a dynamic role for producing electricity as fresh source of renewable energy to the off-grid power connection in remote areas. There are number of research work going across and around the coastlineto generate electrical energy from the ocean waves. Wave energy conversion technologies are important and lead to more research work in future.Wave energy converters converts the mechanical energy obtained from ocean waves to electricity. Researches in this area are driven for the need to meet demand in electricity but it is relatively immature compared to other renewable energy technologies. This proposed paper aims to develop a prototype that can utilize the wave energy to produce electricity. Wave energy generator has been developed and the results are analysed for different specifications of converter and also presented. From the experimental setup it is assured that slowly varying power generation is obtained from ocean wave. This paper also comprises working and main components of the system.

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