A high efficiency standalone magnetoelectric energy converter based on Terfenol-D and PZT laminate

2021 ◽  
Vol 118 (4) ◽  
pp. 044101
Author(s):  
Yunping Niu ◽  
Hao Ren
Keyword(s):  
High Efficiency ◽  
Energy Converter

Design and Hydrodynamic Performance Testing of One-Base Multi-Buoy Floating Sharp Eagle Wave Energy Converter

2015 ◽  
Vol 1092-1093 ◽  
pp. 152-157
Author(s):  
Zhen Peng Wang ◽  
Ya Ge You ◽  
Ya Qun Zhang ◽  
Song Wei Sheng ◽  
Hong Jun Lin
Keyword(s):  
Wave Energy ◽  
High Efficiency ◽  
Performance Testing ◽  
Clean Energy ◽  
Wave Energy Converter ◽  
Hydrodynamic Performance ◽  
Wave Direction ◽  
Energy Converter ◽  
Working Principle ◽  
Period Wave

Research on wave energy extraction has been conducted in many countries to meet the growing demand for clean energy. To find an efficient and economic way to convert wave energy, an one-base multi-buoy offshore floating Sharp Eagle wave energy converter is designed, consisting of four Eagle head absorbing buoys, one semi-submersible barge, one energy conversion system, buoyancy tanks, underwater appendages and other components. The working principle of the device is described in this paper. To test the hydrodynamic performance of device and make an initial evaluation for the design, a model experiment of 1/13.78th scale was carried out. The influence of wave period, wave height, pressure in hydrocylinders and wave direction is tested. All the efficiencies in different conditions are compared with each other, while the high efficiency and stability of device are verified.

Real Sea Testing of a Small Scale Weptos WEC Prototype

2018 ◽  
Author(s):  
Jens Peter Kofoed ◽  
Amelie Tetu ◽  
Francesco Ferri ◽  
Lucia Margheritini ◽  
Nathan Sonalier ◽  
...  
Keyword(s):  
Laboratory Test ◽  
Wave Energy ◽  
High Efficiency ◽  
Small Island ◽  
Small Scale ◽  
Extreme Conditions ◽  
Energy Converter ◽  
Floating Structure ◽  
Multiple Wave ◽  
Data Analyses

The Weptos wave energy converter (WEC) is Danish concept that has been investigated during the last decade in laboratory test campaigns. It is an A-shaped floating structure that absorbs wave energy through multiple wave absorbing bodies. These bodies are rotors, with their shape inspired by the Salter duck, of which its high efficiency has been proven already back in the 1970’s. The Weptos WEC has the ability to maximise power absorption in operational sea states and minimize structural loads in extreme conditions through adjustment of its width. Launch of a small scale real sea prototype of the Weptos WEC was done in July 2017, with a location in Lillebælt between Jylland and Fyn in Denmark, north of the small island Brandsø, at a water depth of 10 m. The paper contains a detailed description of the prototype and its instrumentation, along with the test planning and preliminary data analyses for the evaluation of the device characterization.

Study on a New Array of Oscillating Wave Energy Converter

2014 ◽  
Vol 672-674 ◽  
pp. 432-435 ◽  
Author(s):  
Meng Shao ◽  
Hong Da Shi ◽  
Fei Fei Cao ◽  
Kai Zhu ◽  
Zheng Quan Zhang ◽  
...  
Keyword(s):  
Wave Energy ◽  
High Efficiency ◽  
High Reliability ◽  
Low Cost ◽  
Wave Energy Converter ◽  
Design Parameters ◽  
New Wave ◽  
Energy Converter ◽  
On Demand ◽  
Converter Unit

The paper presents a new array of oscillating wave energy converter, which is in accordance with nowadays’ research tendency of China: high power, high efficiency, high reliability and low cost. The paper gives the design scheme and design parameters of the new wave energy converter. It's composed of the wave energy converter unit, which can be assembled to arrays based on demand. Besides, the paper analyzes the power generation principle and advantages of the device. The research results could be a reference for wave energy’s exploration and utilization.

A Proposed New Concept for a Solar-Energy Converter

1972 ◽  
Vol 94 (2) ◽  
pp. 73-77 ◽  
Author(s):  
R. L. Bailey
Keyword(s):  
Solar Energy ◽  
Large Scale ◽  
High Efficiency ◽  
The United States ◽  
Large Area ◽  
Energy Converter ◽  
Heat Engines ◽  
Efficiency Cost ◽  
New Research ◽  
Solar Electricity

The potential advantages of terrestrially utilizing nonpolluting solar energy are well-known. One of the more promising approaches to achieving the desired high solar-electrical conversion efficiency is the direct process, avoiding Carnot efficiency limitations of heat engines. The chief present-art example is the large area silicon solar cell based on utilization of quantum properties of light. In the United States it is now an established technology created from the space program. This paper presents the results of some preliminary new research exploring the possibilities of creating high efficiency solar-electricity converters utilizing wave-like properties of radiation interacting with absorber-converter elements. The concept is revealed for what is believed to be a new, unique, and potentially useful pyramidical solar radiation absorber-converter structure. It is based on the possibility of extending concepts of power absorbing antennas and converters to the visible light range. The resulting proposed converter structure would have a rough surface texture and yield a d-c output. It may have, if subsequently researched, significant efficiency, cost, and fabricating advantages, particularly for large-scale terrestrial utilization of solar energy. The concept is called an Electromagnetic Wave Energy Converter (EWEC). Concept validity evidences of a preliminary kind at both microwave and near light wavelengths are presented.

scholarly journals Physics of fusion pumped lasers

1989 ◽  
Vol 7 (3) ◽  
pp. 443-447
Author(s):  
D. S. Pappas
Keyword(s):  
High Power ◽  
High Efficiency ◽  
Mean Free Path ◽  
High Energy ◽  
Rare Gas ◽  
Energy Converter ◽  
High Power Lasers ◽  
Light Production ◽  
Fusion Neutrons ◽  
Novel Concept

A novel concept is described which utilizes a liquified rare gas as both an energy converter and high-density lasing media. The concept allows the advantage of the large mean-free path of high energy fusion neutrons together with a highly-efficient mechanism for volumetric production of 1 MeV electrons which causes ionization and excitation throughout the medium. This scheme coupled together with the high efficiency for light production of liquid excimers may provide the possibilities for a new dimension in high power lasers.

Spin Accelerating Mechanism for Gyroscopic Wave Energy Converter

2020 ◽  
Author(s):  
Akio Toyoshima ◽  
Hiroshi Hosaka
Keyword(s):  
Wave Energy ◽  
Power Efficiency ◽  
High Speed ◽  
High Efficiency ◽  
Energy Converter ◽  
Power Generator ◽  
Bevel Gears ◽  
Wave Energy Converters ◽  
Engineering Problems ◽  
Ocean Monitoring

Abstract Many wave energy converters have been developed so far, but there are still many engineering problems to be applied to fishery buoys. Gyroscopic generators that use a rotating mass is characterized by the possibility of downsizing, but since low speed precession rotation is used to generate power, efficiency is so low that they do not work in the size of 1 m3. In this study, a new mechanism is proposed which consists of bevel gears, two clutches and gimbals to accelerate spin by transmitting precession torque mechanically to the spin shaft in order to realize high efficiency power generation by high speed spin rotation. Gear-driven gyroscopic generator using this mechanism which has higher efficiency and longer lifespan than former generators is expected to be applied to the power source of the small ocean monitoring buoys for efficient fisheries. A gyroscopic power generator using the accelerating mechanism with flywheel of diameter of 300 mm was designed, and the accelerating mechanism of the generator was manufactured. An experiment was conducted in which a rotating vibration of 0.5 Hz was applied to confirm the effectivity of the mechanism. The spin speed increased from 35.6 rpm to 225 rpm due to the precession torque. Designed generator is expected to output power of 3 W from this result.

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