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Holistic performance analysis and turbine-induced damping for an OWC wave energy converter

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.renene.2015.07.075 Byline: I. Lopez, B. Pereiras, F. Castro, G. Iglesias Abstract: Although oscillating water column (OWC) systems are one of the most studied types of wave energy converter, developing a metho... Full description

Journal Title: Renewable Energy 2016, Vol.85, p.1155(9)
Main Author: Lopez, I.
Other Authors: Pereiras, B. , Castro, F. , Iglesias, G.
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: Cengage Learning, Inc.
ID: ISSN: 0960-1481
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recordid: gale_ofa434015089
title: Holistic performance analysis and turbine-induced damping for an OWC wave energy converter
format: Article
creator:
  • Lopez, I.
  • Pereiras, B.
  • Castro, F.
  • Iglesias, G.
subjects:
  • Electric Converters – Case Studies
  • Electric Converters – Analysis
  • Turbines – Case Studies
  • Turbines – Analysis
ispartof: Renewable Energy, 2016, Vol.85, p.1155(9)
description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.renene.2015.07.075 Byline: I. Lopez, B. Pereiras, F. Castro, G. Iglesias Abstract: Although oscillating water column (OWC) systems are one of the most studied types of wave energy converter, developing a method for selecting the optimum turbine for an OWC at a given site -- i.e., subjected to a particular wave climate -- remains a current research topic. The objective of this work is to develop and apply a methodology for determining the optimum turbine-induced damping, i.e., that which maximises the performance of the conversion from wave to pneumatic energy, in an OWC equipped with a self-rectifying impulse turbine. The turbine can then be dimensioned to achieve this damping level. Illustrated through a case study, this method adopts a holistic approach encompassing the site-specific wave climate variability. A validated RANS-VOF model is implemented to compute the performance of the OWC for a range of damping coefficients (corresponding to different turbines) and wave conditions, selected based on their energy content and weighted by their occurrence at the site. In this manner, the pneumatic power matrices corresponding to different values of turbine-induced damping are computed, and the optimum damping accounting for the wave climate variability is determined. We find that this methodology may lead to a significant improvement in the annual energy output of the OWC chamber. Author Affiliation: (a) University of Santiago de Compostela, EPS, GICEMA, Campus Universitario s/n, 27002, Lugo, Spain (b) Department of Energy, University of Oviedo, Energy Building (EDZE), Campus de Viesques s/n, 33271, Gijon, Spain (c) Department of Energy and Fluid Mechanics Engineering, University of Valladolid, Paseo del Cauce 59, 47011, Valladolid, Spain (d) School of Marine Science and Engineering, Plymouth University, Plymouth, PL4 8AA, UK Article History: Received 25 February 2015; Revised 9 July 2015; Accepted 27 July 2015
language: eng
source: Cengage Learning, Inc.
identifier: ISSN: 0960-1481
fulltext: no_fulltext
issn:
  • 0960-1481
  • 09601481
url: Link


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titleHolistic performance analysis and turbine-induced damping for an OWC wave energy converter
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ispartofRenewable Energy, 2016, Vol.85, p.1155(9)
identifierISSN: 0960-1481
subjectElectric Converters – Case Studies ; Electric Converters – Analysis ; Turbines – Case Studies ; Turbines – Analysis
descriptionTo link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.renene.2015.07.075 Byline: I. Lopez, B. Pereiras, F. Castro, G. Iglesias Abstract: Although oscillating water column (OWC) systems are one of the most studied types of wave energy converter, developing a method for selecting the optimum turbine for an OWC at a given site -- i.e., subjected to a particular wave climate -- remains a current research topic. The objective of this work is to develop and apply a methodology for determining the optimum turbine-induced damping, i.e., that which maximises the performance of the conversion from wave to pneumatic energy, in an OWC equipped with a self-rectifying impulse turbine. The turbine can then be dimensioned to achieve this damping level. Illustrated through a case study, this method adopts a holistic approach encompassing the site-specific wave climate variability. A validated RANS-VOF model is implemented to compute the performance of the OWC for a range of damping coefficients (corresponding to different turbines) and wave conditions, selected based on their energy content and weighted by their occurrence at the site. In this manner, the pneumatic power matrices corresponding to different values of turbine-induced damping are computed, and the optimum damping accounting for the wave climate variability is determined. We find that this methodology may lead to a significant improvement in the annual energy output of the OWC chamber. Author Affiliation: (a) University of Santiago de Compostela, EPS, GICEMA, Campus Universitario s/n, 27002, Lugo, Spain (b) Department of Energy, University of Oviedo, Energy Building (EDZE), Campus de Viesques s/n, 33271, Gijon, Spain (c) Department of Energy and Fluid Mechanics Engineering, University of Valladolid, Paseo del Cauce 59, 47011, Valladolid, Spain (d) School of Marine Science and Engineering, Plymouth University, Plymouth, PL4 8AA, UK Article History: Received 25 February 2015; Revised 9 July 2015; Accepted 27 July 2015
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abstractTo link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.renene.2015.07.075 Byline: I. Lopez, B. Pereiras, F. Castro, G. Iglesias Abstract: Although oscillating water column (OWC) systems are one of the most studied types of wave energy converter, developing a method for selecting the optimum turbine for an OWC at a given site -- i.e., subjected to a particular wave climate -- remains a current research topic. The objective of this work is to develop and apply a methodology for determining the optimum turbine-induced damping, i.e., that which maximises the performance of the conversion from wave to pneumatic energy, in an OWC equipped with a self-rectifying impulse turbine. The turbine can then be dimensioned to achieve this damping level. Illustrated through a case study, this method adopts a holistic approach encompassing the site-specific wave climate variability. A validated RANS-VOF model is implemented to compute the performance of the OWC for a range of damping coefficients (corresponding to different turbines) and wave conditions, selected based on their energy content and weighted by their occurrence at the site. In this manner, the pneumatic power matrices corresponding to different values of turbine-induced damping are computed, and the optimum damping accounting for the wave climate variability is determined. We find that this methodology may lead to a significant improvement in the annual energy output of the OWC chamber. Author Affiliation: (a) University of Santiago de Compostela, EPS, GICEMA, Campus Universitario s/n, 27002, Lugo, Spain (b) Department of Energy, University of Oviedo, Energy Building (EDZE), Campus de Viesques s/n, 33271, Gijon, Spain (c) Department of Energy and Fluid Mechanics Engineering, University of Valladolid, Paseo del Cauce 59, 47011, Valladolid, Spain (d) School of Marine Science and Engineering, Plymouth University, Plymouth, PL4 8AA, UK Article History: Received 25 February 2015; Revised 9 July 2015; Accepted 27 July 2015
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