scholarly journals A New Solution for Sea Wave Energy Harvesting, the Proposal of an Ironless Linear Generator

2020 ◽  
Vol 8 (2) ◽  
pp. 93 ◽  
Author(s):  
Domenico Curto ◽  
Alessia Viola ◽  
Vincenzo Franzitta ◽  
Marco Trapanese ◽  
Fabio Cardona
Keyword(s):  
Wave Energy ◽  
Magnetic Force ◽  
Vertical Motion ◽  
Small Islands ◽  
Sea Waves ◽  
Energy Converter ◽  
Energy Potential ◽  
Linear Generator ◽  
Three Phase ◽  
Sea Wave

The paper investigates an innovative ironless linear generator, installable inside a wave energy converter, in order to produce electricity from sea waves. This energy source is considered strategic for the future, especially in small islands; however, this technology is still far from the commercial phase. Considering the wave energy potential of the Mediterranean Sea, a first prototype of the electrical linear generator was realized at the Department of Engineering of Palermo University. This machine can be run by a two-floating buoys system, able to produce a linear vertical motion. The main goal of this paper is the investigation of the advantages and the disadvantages of the utilization of steel materials to realize the stator of linear generators. Thus, starting from the prototype, the authors analyzed the effects produced by the replacement of steel in the stator with a non-magnetic material. For comparison, the authors evaluated the amplitude of no-load voltages, using a three-phase connection scheme, and the amplitude of the magnetic force produced by the interaction of magnets with the stator. Both aspects were evaluated through numerical simulations and mathematical models.

Energy Indicators Of A Cylindrical Magneto-Electric Sea Wave Energy Converter

2021 ◽  
Author(s):  
Anatoliy Raschepkin ◽  
Igor Kondratenko ◽  
Oleksiy Karlov ◽  
Roman Kryshchuk
Keyword(s):  
Wave Energy ◽  
Wave Energy Converter ◽  
Energy Converter ◽  
Energy Indicators ◽  
Sea Wave

scholarly journals Linear generator-based wave energy converter model with experimental verification and three loading strategies

2016 ◽  
Vol 10 (3) ◽  
pp. 349-359 ◽  
Author(s):  
Yue Hong ◽  
Valeria Castellucci ◽  
Mikael Eriksson ◽  
Cecilia Boström ◽  
Rafael Waters
Keyword(s):  
Wave Energy ◽  
Experimental Verification ◽  
Wave Energy Converter ◽  
Energy Converter ◽  
Linear Generator

Tadpole: A Design Problem in the Mechanics of the Use of Sea Wave Energy

1996 ◽  
Vol 210 (4) ◽  
pp. 273-277 ◽  
Author(s):  
M J French
Keyword(s):  
Wave Energy ◽  
Special Interest ◽  
Reaction Force ◽  
Electrical Energy ◽  
Wave Forces ◽  
Sea Waves ◽  
Small Machine ◽  
Clear Insight ◽  
Insight Into ◽  
Sea Wave

A study is made of a device for obtaining electrical energy from sea waves, in which the problem of providing a reaction against the wave forces is met by a combination of a pendulum and gyroscopes. The mechanics is developed in a logical manner which gives a clear insight into the function, the pendulum providing the reaction force, which leaves an unbalanced moment to be countered by the gyroscopes, which also constitute the power take-off. The result is a relatively small machine with no external moving parts. The treatment requires no understanding of wave hydrodynamics. It is felt this paper may be of special interest as a design study, in which the relation between the mechanics and the development of the concept is peculiarly cogent.

Modeling and Experiment of a Novel Micro Wave Energy Converter

2017 ◽  
Vol 863 ◽  
pp. 175-182
Author(s):  
Yi Ming Zhu ◽  
Zi Rong Luo ◽  
Zhong Yue Lu ◽  
Jian Zhong Shang
Keyword(s):  
Output Power ◽  
Wave Energy ◽  
Mechanical Energy ◽  
Vertical Motion ◽  
Electrical Energy ◽  
Wave Energy Converter ◽  
Design Parameters ◽  
Energy Converter ◽  
Drive Power ◽  
Continuous Rotation

This paper proposed a novel micro wave energy converter which can convert irregular wave energy into rotating mechanical energy, then into electrical energy. The device consists of an energy absorption part and an energy conversion part. In details, the blades are installed on the absorber circumferentially and averagely, which are capable of converting the vertical motion of the surface body to continuous rotation of the absorber and leading to a great increase in efficiency. A physical prototype was built to test the performance of the novel generator and optimize the design parameters. In the experiment part, a linear motion electric cylinder was used as the drive power to provide the heaving motion for the device. And the experiment platform was built for modeling a marine environment. Also, a data acquisition program was edited in Labview. Thus, the experiment analyzed the influence of amplitude, frequency, blade angle and resistance value to the output power, and then obtained the optimum parameters combination which can maximize the value of the output power. The result will provide reference for the device’s further application.

Design, construction, and ocean testing of a taut-moored dual-body wave energy converter with a linear generator power take-off

2010 ◽  
Vol 35 (2) ◽  
pp. 348-354 ◽  
Author(s):  
David Elwood ◽  
Solomon C. Yim ◽  
Joe Prudell ◽  
Chad Stillinger ◽  
Annette von Jouanne ◽  
...  
Keyword(s):  
Wave Energy ◽  
Body Wave ◽  
Wave Energy Converter ◽  
Energy Converter ◽  
Linear Generator ◽  
Design Construction

Study of the foundation design for a linear generator wave energy converter using stochastic methods

2015 ◽  
Vol 7 (6) ◽  
pp. 063112 ◽  
Author(s):  
Wei Li ◽  
Jan Isberg ◽  
Jens Engström ◽  
Rafael Waters ◽  
Mats Leijon
Keyword(s):  
Wave Energy ◽  
Wave Energy Converter ◽  
Stochastic Methods ◽  
Energy Converter ◽  
Foundation Design ◽  
Linear Generator

scholarly journals Wave–structure interactions for the distensible tube wave energy converter

2016 ◽  
Vol 472 (2192) ◽  
pp. 20160160
Author(s):  
Warren R. Smith
Keyword(s):  
Wave Energy ◽  
Sea Water ◽  
Wave Structure ◽  
Complex Interaction ◽  
Wave Energy Converter ◽  
Sea Waves ◽  
Energy Converter ◽  
Distensible Tube ◽  
Tube Wave ◽  
Work Done

A comprehensive linear mathematical model is constructed to address the open problem of the radiated wave for the distensible tube wave energy converter. This device, full of sea water and located just below the surface of the sea, undergoes a complex interaction with the waves running along its length. The result is a bulge wave in the tube which, providing certain criteria are met, grows in amplitude and captures the wave energy through the power take-off mechanism. Successful optimization of the device means capturing the energy from a much larger width of the sea waves (capture width). To achieve this, the complex interaction between the incident gravity waves, radiated waves and bulge waves is investigated. The new results establish the dependence of the capture width on absorption of the incident wave, energy loss owing to work done on the tube, imperfect tuning and the radiated wave. The new results reveal also that the wave–structure interactions govern the amplitude, phase, attenuation and wavenumber of the transient bulge wave. These predictions compare well with experimental observations.

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