An experimental and numerical analysis of an I-beam attenuator-type, oscillating water column wave energy converter

2015 ◽  
pp. 437-443
Author(s):  
Harry Bingham ◽  
Robert Read ◽  
Frederik Jakobsen ◽  
Morten Simonsen ◽  
Pablo Guillen ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Water Column ◽  
Wave Energy ◽  
Wave Energy Converter ◽  
Oscillating Water Column ◽  
Energy Converter

NUMERICAL ANALYSIS OF A SAVONIUS TURBINE INSERTED IN OSCILLATING WATER COLUMN WAVE ENERGY CONVERTER

2021 ◽  
Author(s):  
Andrei Santos ◽  
Filipe Branco Teixeira ◽  
Liércio Isoldi ◽  
jeferson Avila Souza ◽  
Mateus das Neves Gomes ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Water Column ◽  
Wave Energy ◽  
Wave Energy Converter ◽  
Oscillating Water Column ◽  
Energy Converter

Numerical analysis of the hydropneumatic chamber shape influence in an oscillating water column (OWC) wave energy converter (WEC)

2013 ◽  
Vol 8 (2) ◽  
pp. 111-119
Author(s):  
Liércio André Isoldi ◽  
Juliana do Amaral Martins Grimmler ◽  
Nathalia da Rosa Lopes ◽  
Mateus das Neves Gomes ◽  
Jeferson Avila Souza ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Water Column ◽  
Wave Energy ◽  
Wave Energy Converter ◽  
Oscillating Water Column ◽  
Energy Converter ◽  
Shape Influence

scholarly journals Geometric Analysis through the Constructal Design of a Sea Wave Energy Converter with Several Coupled Hydropneumatic Chambers Considering the Oscillating Water Column Operating Principle

2021 ◽  
Vol 11 (18) ◽  
pp. 8630
Author(s):  
Yuri Theodoro Barbosa de Lima ◽  
Mateus das Neves Gomes ◽  
Liércio André Isoldi ◽  
Elizaldo Domingues dos Santos ◽  
Giulio Lorenzini ◽  
...  
Keyword(s):  
Water Column ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Wave Energy ◽  
Performance Indicator ◽  
Wave Energy Converter ◽  
Oscillating Water Column ◽  
Energy Converter ◽  
Constructal Design

The work presents a numerical study of a wave energy converter (WEC) device based on the oscillating water column (OWC) operating principle with a variation of one to five coupled chambers. The main objective is to evaluate the influence of the geometry and the number of coupled chambers to maximize the available hydropneumatic power converted in the energy extraction process. The results were analyzed using the data obtained for hydropneumatic power, pressure, mass flow rate, and the calculated performance indicator’s hydropneumatic power. The Constructal Design method associated with the Exhaustive Search optimization method was used to maximize the performance indicator and determine the optimized geometric configurations. The degrees of freedom analyzed were the ratios between the height and length of the hydropneumatic chambers. A wave tank represents the computational domain. The OWC device is positioned inside it, subject to the regular incident waves. Conservation equations of mass and momentum and one equation for the transport of the water volume fraction are solved with the finite volume method (FVM). The multiphase model volume of fluid (VOF) is used to tackle the water–air mixture. The analysis of the results took place by evaluating the performance indicator in each chamber separately and determining the accumulated power, which represents the sum of all the powers calculated in all chambers. The turbine was ignored, i.e., only the duct without it was analyzed. It was found that, among the cases examined, the device with five coupled chambers converts more energy than others and that there is an inflection point in the performance indicator, hydropneumatic power, as the value of the degree of freedom increases, characterizing a decrease in the value of the performance indicator. With the results of the hydropneumatic power, pressure, and mass flow rate, it was possible to determine a range of geometry values that maximizes the energy conversion, taking into account the cases of one to five coupled chambers and the individual influence of each one.

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