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Title: Preliminary Analysis of an Oscillating Surge Wave Energy Converter with Controlled Geometry: Preprint

Abstract

The aim of this paper is to present a novel wave energy converter device concept that is being developed at the National Renewable Energy Laboratory. The proposed concept combines an oscillating surge wave energy converter with active control surfaces. These active control surfaces allow for the device geometry to be altered, which leads to changes in the hydrodynamic properties. The device geometry will be controlled on a sea state time scale and combined with wave-to-wave power-take-off control to maximize power capture, increase capacity factor, and reduce design loads. The paper begins with a traditional linear frequency domain analysis of the device performance. Performance sensitivity to foil pitch angle, the number of activated foils, and foil cross section geometry is presented to illustrate the current design decisions; however, it is understood from previous studies that modeling of current oscillating wave energy converter designs requires the consideration of nonlinear hydrodynamics and viscous drag forces. In response, a nonlinear model is presented that highlights the shortcomings of the linear frequency domain analysis and increases the precision in predicted performance.

Authors:
; ; ;
Publication Date:
Research Org.:
NREL (National Renewable Energy Laboratory (NREL)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)
OSTI Identifier:
1225500
Report Number(s):
NREL/CP-5000-64545
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: European Wave and Tidal Energy Conference;Nantes, France; -
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; 42 ENGINEERING; wave energy converter; WEC; active geometry; oscillating surge WEC; time-varying parameters; load shedding; NREL

Citation Formats

Tom, Nathan, Lawson, Michael, Yu, Yi-Hsiang, and Wright, Alan. Preliminary Analysis of an Oscillating Surge Wave Energy Converter with Controlled Geometry: Preprint. United States: N. p., 2015. Web.
Tom, Nathan, Lawson, Michael, Yu, Yi-Hsiang, & Wright, Alan. Preliminary Analysis of an Oscillating Surge Wave Energy Converter with Controlled Geometry: Preprint. United States.
Tom, Nathan, Lawson, Michael, Yu, Yi-Hsiang, and Wright, Alan. Wed . "Preliminary Analysis of an Oscillating Surge Wave Energy Converter with Controlled Geometry: Preprint". United States. https://www.osti.gov/servlets/purl/1225500.
@article{osti_1225500,
title = {Preliminary Analysis of an Oscillating Surge Wave Energy Converter with Controlled Geometry: Preprint},
author = {Tom, Nathan and Lawson, Michael and Yu, Yi-Hsiang and Wright, Alan},
abstractNote = {The aim of this paper is to present a novel wave energy converter device concept that is being developed at the National Renewable Energy Laboratory. The proposed concept combines an oscillating surge wave energy converter with active control surfaces. These active control surfaces allow for the device geometry to be altered, which leads to changes in the hydrodynamic properties. The device geometry will be controlled on a sea state time scale and combined with wave-to-wave power-take-off control to maximize power capture, increase capacity factor, and reduce design loads. The paper begins with a traditional linear frequency domain analysis of the device performance. Performance sensitivity to foil pitch angle, the number of activated foils, and foil cross section geometry is presented to illustrate the current design decisions; however, it is understood from previous studies that modeling of current oscillating wave energy converter designs requires the consideration of nonlinear hydrodynamics and viscous drag forces. In response, a nonlinear model is presented that highlights the shortcomings of the linear frequency domain analysis and increases the precision in predicted performance.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {9}
}

Conference:
Other availability
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