VERIFICATION OF A PROPOSED COMPUTATIONAL MODEL FOR AN OSCILLATING WATER COLUMN TYPE ENERGY CONVERTER CONSIDERING SEA STATE DATA

2017 ◽  
Author(s):  
Sersana Sabedra de Oliveira ◽  
Edis Antunes Pinto Junior ◽  
Luciano Rodrigues ◽  
Phelype Haron Oleinik ◽  
Mateus das Neves Gomes ◽  
...  
Keyword(s):  
Computational Model ◽  
Water Column ◽  
Oscillating Water Column ◽  
Energy Converter ◽  
Sea State ◽  
State Data ◽  
Column Type

scholarly journals G100062 A Design of Oscillating Water Column Type Wave Energy Converter Model

2011 ◽  
Vol 2011 (0) ◽  
pp. _G100062-1-_G100062-4
Author(s):  
Makoto KATOH ◽  
Takashi TOKIMIZU ◽  
Shoki DAIKOKU ◽  
Masaki ISHITANI
Keyword(s):  
Water Column ◽  
Wave Energy ◽  
Wave Energy Converter ◽  
Oscillating Water Column ◽  
Energy Converter ◽  
Type Wave ◽  
Column Type

Modeling of an Oscillating Water Column on the Floating Foundation WindFloat

2011 ◽  
Author(s):  
Alexia Aubault ◽  
Marco Alves ◽  
Anto´nio Sarmento ◽  
Dominique Roddier ◽  
Antoine Peiffer
Keyword(s):  
Water Column ◽  
Economic Cost ◽  
Diffraction Radiation ◽  
Oscillating Water Column ◽  
Power Capacity ◽  
Energy Converter ◽  
Floating Structure ◽  
Wells Turbine ◽  
Floating Foundation ◽  
Column Type

This paper summarizes the theory behind the modeling that was performed to incorporate an oscillating-water-column type Wave energy Converter (WEC) into the WindFloat hull. The WindFloat is a floating structure supporting a very large (>5MW) wind turbine. By adding a WEC to the structure, the overall economic cost of the project can be improved by sharing both mooring and power infrastructure. A numerical model was developed using the diffraction-radiation code WAMIT and assuming as PTO equipment, a generic wells turbine. It is important to model the turbine accurately, to understand the power capacity of the device. Details on the modeling of the system are discussed and numerical results and compared against experiments as a validation of the model. The effect of coupling between the floating foundation of the WindFloat and the OWC is investigated thoroughly.

scholarly journals Numerical Evaluation of the Hydropneumatic Power of the Oscillating Water Column Wave Energy Converter Submitted to Regular and Irregular Waves

2021 ◽  
pp. 32-43
Author(s):  
Augusto Hack da Silva Koch ◽  
Maycon da Silveira Paiva ◽  
Caroline Barbosa Monteiro ◽  
Phelype Haron Oleinik ◽  
Liércio André Isoldi ◽  
...  
Keyword(s):  
Free Surface ◽  
Water Column ◽  
Wave Energy ◽  
Wave Energy Converter ◽  
Irregular Waves ◽  
Oscillating Water Column ◽  
Regular Waves ◽  
Energy Converter ◽  
Sea State ◽  
Electric Generator

The purpose of this study is to computationally analyze the hydropneumatic power available in the air duct of an Oscillating Water Column (OWC) Wave Energy Converter (WEC) device when subject to realistic sea state data (irregular waves) and when submitted to the regular waves representative of this sea state. The OWC WEC is mainly composed of a hydropneumatic chamber and an air duct where a turbine and electric generator are coupled. The chamber is open below the free surface while the duct is open to the atmosphere. The oscillating movement of the water-free surface inside the chamber causes the air to flow, moving the turbine and generating electricity. To execute this study, a bi-dimensional computational model was considered and numerical simulations of wave generation were carried out using ANSYS Fluent, which is a Computational Fluid Dynamics (CFD) software based on the Finite Volume Method (FVM). The Volume of Fluid (VOF) multi-phase model was applied in the treatment of the water-air interaction. To evaluate the average hydropneumatic power available in the duct, the static pressure, velocity, and air mass flow rate were monitored. The results were analyzed, showing that the available power is 250% greater when the device is subject to realistic irregular waves rather than subject to representative regular waves.

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