Characteristics of Hydrodynamics and Generating Output of the Offshore Floating Wave Energy Device “Mighty Whale”

2013 ◽  
Vol 135 (1) ◽  
Author(s):  
Hiroyuki Osawa ◽  
Tsuyoshi Miyazaki ◽  
Shogo Miyajima
Keyword(s):  
Energy Absorption ◽  
Output Power ◽  
Wave Energy ◽  
Power Device ◽  
Hydrodynamic Characteristics ◽  
Wave Power ◽  
Water Tank ◽  
Power Devices ◽  
Turbine Generator ◽  
Generator System

In this paper, a new numerical calculation method is presented; it was developed for the analysis of the hydrodynamic characteristics of a floating, oscillating water column (OWC) type wave power device. The method is examined by comparing results calculated with the method with results of water tank experiments. The examination was concerned with the determination of hydrodynamic coefficients, characteristics of air pressure and water level in an air chamber, and characteristics of hull motion and wave energy absorption. The calculated results agreed with the results of water tank tests; the method presented adequately estimated the hydrodynamic characteristics of the floating OWC type wave power device, including the wave energy absorption effects. An estimation method is presented for the output power of a turbine-generator system. The method was developed for the design of the “Mighty Whale” turbine-generator system. Moreover, the method was assessed by comparing predictions with open sea test results. The mean value of the output power was estimated reasonably well. In conclusion, the estimation methods presented are useful for the design of floating OWC wave power devices. Such tools are useful for the designer interested in developing optimal wave power devices.

scholarly journals The Development of Wave Energy Conversion Device to Generate Electricity

2015 ◽  
Vol 773-774 ◽  
pp. 460-464 ◽  
Author(s):  
M.D. Lafsah ◽  
Mohd Zamri Ibrahim ◽  
Aliashim Albani
Keyword(s):  
Energy Conversion ◽  
Wave Energy ◽  
Power Device ◽  
Wave Power ◽  
Wave Energy Conversion ◽  
Electric Generator ◽  
Measurement Results ◽  
Conversion System ◽  
Energy Conversion System ◽  
Final System

The wave energy is one of promising resource for generating electricity in this country. A wave energy conversion system was designed and fabricated; the prototype was tested and its performance was analyzed. The invention herein proposed a system operated by wave resource. This configuration allows the wave resource working to generate electricity. Wave power device operated by the movement of floaters with varying speed connected to the mechanical racks. These mechanical racks move gears and pulleys, which giving forces to the pulley’s belts to rotate. This pulley’s belts connected to the electric generator that produces the electricity. The final system was tested in the coastal area near to Universiti Malaysia Terengganu (UMT) campus. The measurement results clearly show that the available wave resource could be harness into useful work for electric power generation.

Long-Term Wave Power Statistics for Individual Waves

2015 ◽  
Vol 137 (4) ◽  
Author(s):  
Bernt J. Leira ◽  
Dag Myrhaug
Keyword(s):  
Wave Height ◽  
Wave Climate ◽  
Statistical Information ◽  
Power Device ◽  
Wave Power ◽  
Power Devices ◽  
Short Term ◽  
Wave Power Potential ◽  
The Individual

The paper provides long-term bivariate distributions of wave power with wave height, and wave power with wave period. This is relevant for assessments of wave power devices and their potential for converting energy from waves. The results can be applied to compare systematically the wave power potential for individual waves at different locations based on short-term statistical description of the individual waves and the long-term statistical information of the wave climate. Furthermore, it allows for assessment of the efficiency of a given wave power device for each location.

Design of 3D Modeling for the New Wave Power Generation Device and Test

2013 ◽  
Vol 300-301 ◽  
pp. 338-343 ◽  
Author(s):  
Shi Ming Wang ◽  
Ya Nan Wang ◽  
Yin Liu
Keyword(s):  
Wave Energy ◽  
3D Modeling ◽  
Mechanical Energy ◽  
Electric Energy ◽  
Structure Design ◽  
Power Device ◽  
Wave Power ◽  
New Wave ◽  
Ocean Wave Energy ◽  
Power Generation Device

Ocean wave energy is one kind of potential renewable energy that its energy density is far greater than solar energy or wind energy. This paper put forward a new method of using wave turbine to absorb wave energy, then output mechanical energy through mechanical drivers to generator, finally convert to electric energy by generator. Generally, structure design of the wave-wing is very important to the device. It is the important component of the device for absorbing wave energy. For this study, we design the 3D modeling of the new wave power device through SolidWorks software, and generate the wave turbine on proportion of 1:1. We have tested the wave turbine in the pool of the laboratory and obtain the torque and power under certain conditions.

scholarly journals A Fundamental Study on Wave Energy Absorption Performance of the OWC Type Wave Power Absorbing buoy

2014 ◽  
Vol 131 (0) ◽  
pp. 113-118
Author(s):  
Mitsuhiro MASUDA ◽  
Shin IBARAKI ◽  
Kiyokazu MINAMI ◽  
Yutaro SASAHARA
Keyword(s):  
Energy Absorption ◽  
Wave Energy ◽  
Wave Power ◽  
Fundamental Study ◽  
Type Wave ◽  
Absorption Performance

Investigation and Analysis on the Performance of the Oscillating Buoy Wave Power Device under the South China Sea

2013 ◽  
Vol 321-324 ◽  
pp. 1365-1372
Author(s):  
Lai Feng Mao ◽  
Jun Zhang ◽  
Quan You Qu ◽  
Hong Zhou He
Keyword(s):  
South China Sea ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
South China ◽  
Dynamic Characteristics ◽  
Wave Energy ◽  
Energy Conversion Efficiency ◽  
Power Device ◽  
Wave Power ◽  
China Sea

The oscillating buoy wave power device is more effective than other devices in energy conversion efficiency, and now it has been widely applied in development of marine wave energy. The oscillating buoy, which is an important component for the oscillating buoy wave power device, is closely related to energy conversion efficiency. In this paper, considering applying conditions in South China Sea, the dynamic characteristic for oscillating buoy is simulated using AQWA software. By analyzing and comparing dynamic characteristics of several different structure bodies, an optimal structure buoy is obtained and it has better energy conversion efficiency.

Design of 3D Modeling for the Floating Wave Power Generation Device and Test

2013 ◽  
Vol 718-720 ◽  
pp. 1603-1608
Author(s):  
Shi Ming Wang ◽  
Ya Nan Wang ◽  
Li Na Ma
Keyword(s):  
Power Generation ◽  
Wave Energy ◽  
3D Modeling ◽  
Mechanical Energy ◽  
Electric Energy ◽  
Structure Design ◽  
Power Device ◽  
Wave Power ◽  
Ocean Wave Energy ◽  
Power Generation Device

Ocean wave energy is one kind of potential renewable energy, and the devices of using wave energy generate power are varied. This paper put forward a new method of using wave turbine to absorb wave energy, then output mechanical energy through mechanical drivers to generator, finally convert to electric energy by generator directly. Generally, structure design of the wave-wing is very important to the device. It is the important component of the device for absorbing wave energy. For this study, we designed the 3D modeling of the floating wave power device through SolidWorks software, and produced the wave turbine on proportion of 1:1. We had tested the wave turbine in the pool of the laboratory and obtain the torque and power under certain conditions.

The Open Sea Tests of the Offshore Floating Type Wave Power Device “Mighty Whale”: Performance of the Prototype

2002 ◽  
Author(s):  
Teruhisa Ogata ◽  
Yukihisa Washio ◽  
Hiroyuki Osawa ◽  
Yasushi Tsuritani ◽  
Seiya Yamashita ◽  
...  
Keyword(s):  
Wave Height ◽  
Wave Energy ◽  
Wave Period ◽  
Power Device ◽  
Design Stage ◽  
Wave Power ◽  
Significant Wave ◽  
Type Wave ◽  
Open Sea ◽  
Floating Type

This paper presents the characteristics of wave conditions, wave energy absorption, response of hull-motion and wave height dissipation based on the results of the open sea tests. 0.5–1.0m of significant wave height and 6–7 seconds of significant wave period appear the most predominant, and average wave energy is estimated 4.88kW/m around the test site. Average power output for the test is approximately 6kWh and the maximum total energy efficiency is around 15% that is ranging from 6–7 seconds of significant wave period. Slow drift oscillation of hull was observed motion in surge, sway and yaw and the value of its amplitude almost equal to estimated values in design stage. Then the mean value of transmission coefficient is about 0.8 under 8.0 seconds of significant wave period. We are considering that the results of the tests should be useful for optimum design of an offshore floating type wave power device.

Sign in / Sign up

Export Citation Format

Share Document