Investigation of new layout design concepts of an array-on-device WaveSub device

Faraggiana, E.; Chapman, J.C.; Williams, Alison; Whitlam, C.; Masters, Ian

doi:10.1016/j.renene.2022.03.126

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Investigation of new layout design concepts of an array-on-device WaveSub device

E. Faraggiana, J.C. Chapman

, Alison Williams

, C. Whitlam, Ian Masters

Renewable Energy, Volume: 190, Pages: 501 - 523

Swansea University Authors: Alison Williams , Ian Masters

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DOI (Published version): 10.1016/j.renene.2022.03.126

Abstract

Wave Energy Converters (WECs) have not yet proven their competitiveness in the mainstream energy market. Research and development of this technology are necessary to find optimal solutions in terms both of energy produced and reduced cost. A WEC farm is expected to have reduced Levelized Cost of Ene...

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Published in:	Renewable Energy
ISSN:	0960-1481
Published:	Elsevier BV 2022
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa59821
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Research and development of this technology are necessary to find optimal solutions in terms both of energy produced and reduced cost. A WEC farm is expected to have reduced Levelized Cost of Energy (LCoE) compared to individual devices due to shared installation and grid connection costs. Studies show that energy yield of a WEC array is highly dependent on spacing and layout of the WECs. A method for selecting an optimal array layout is desirable.Here we show a comparison between 4 different design layouts of a WaveSub device with six floats. A six float configuration has been chosen because the LCoE reduces with increasing floats per device as shown in previous research. An optimal configuration in terms of LCoE and rated power is found for linear, rectangle, triangle and circular multi-float configurations. Parameters optimised are float spacing and Power Take Off (PTO) stiffness, damping and rated power. The optimisation algorithm uses a genetic algorithm combined with a Kriging surrogate model. Numerical simulations are solved in the time-domain in WEC-Sim while the hydrodynamic coefficients are calculated in Nemoh using a linear potential flow theory.For all geometric configurations, the smallest float spacing was the most promising because of the lower cost of the structure. In fact, the influence of the float spacing on the power produced by the device is shown to be less significant than the influence of float spacing on the capital cost. Overall, the circular configuration outperformed the other configurations. This study shows that layout configurations can be investigated with optimisation and this could be applied to other configurations and other WEC concepts in future.</abstract><type>Journal Article</type><journal>Renewable Energy</journal><volume>190</volume><journalNumber/><paginationStart>501</paginationStart><paginationEnd>523</paginationEnd><publisher>Elsevier BV</publisher><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint>0960-1481</issnPrint><issnElectronic/><keywords>Renewable energy, Wave energy, Genetic algorithm, WEC farm, Levelized cost of energy, Wave potential theory</keywords><publishedDay>1</publishedDay><publishedMonth>5</publishedMonth><publishedYear>2022</publishedYear><publishedDate>2022-05-01</publishedDate><doi>10.1016/j.renene.2022.03.126</doi><url/><notes/><college>COLLEGE NANME</college><department>Mechanical Engineering</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>MECH</DepartmentCode><institution>Swansea University</institution><apcterm/><funders>This research is supported by the Knowledge Economy Skills Scholarships (KESS 2). It is a pan-Wales higher level skills initiative led by Bangor University on behalf of the HE sector in Wales. It is part funded by the Welsh Government's European Social Fund (ESF) convergence programme for West Wales and the Valleys. 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spelling	2022-10-31T20:08:20.7929559 v2 59821 2022-04-13 Investigation of new layout design concepts of an array-on-device WaveSub device cb1b1946eccac3bbf7592d6ab1c4d065 0000-0002-2494-1468 Alison Williams Alison Williams true false 6fa19551092853928cde0e6d5fac48a1 0000-0001-7667-6670 Ian Masters Ian Masters true false 2022-04-13 MECH Wave Energy Converters (WECs) have not yet proven their competitiveness in the mainstream energy market. Research and development of this technology are necessary to find optimal solutions in terms both of energy produced and reduced cost. A WEC farm is expected to have reduced Levelized Cost of Energy (LCoE) compared to individual devices due to shared installation and grid connection costs. Studies show that energy yield of a WEC array is highly dependent on spacing and layout of the WECs. A method for selecting an optimal array layout is desirable.Here we show a comparison between 4 different design layouts of a WaveSub device with six floats. A six float configuration has been chosen because the LCoE reduces with increasing floats per device as shown in previous research. An optimal configuration in terms of LCoE and rated power is found for linear, rectangle, triangle and circular multi-float configurations. Parameters optimised are float spacing and Power Take Off (PTO) stiffness, damping and rated power. The optimisation algorithm uses a genetic algorithm combined with a Kriging surrogate model. Numerical simulations are solved in the time-domain in WEC-Sim while the hydrodynamic coefficients are calculated in Nemoh using a linear potential flow theory.For all geometric configurations, the smallest float spacing was the most promising because of the lower cost of the structure. In fact, the influence of the float spacing on the power produced by the device is shown to be less significant than the influence of float spacing on the capital cost. Overall, the circular configuration outperformed the other configurations. This study shows that layout configurations can be investigated with optimisation and this could be applied to other configurations and other WEC concepts in future. Journal Article Renewable Energy 190 501 523 Elsevier BV 0960-1481 Renewable energy, Wave energy, Genetic algorithm, WEC farm, Levelized cost of energy, Wave potential theory 1 5 2022 2022-05-01 10.1016/j.renene.2022.03.126 COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University This research is supported by the Knowledge Economy Skills Scholarships (KESS 2). It is a pan-Wales higher level skills initiative led by Bangor University on behalf of the HE sector in Wales. It is part funded by the Welsh Government's European Social Fund (ESF) convergence programme for West Wales and the Valleys. The work was also supported by the SURFTEC SuperGen grand challenge project, funded under EPSRC grant EP/N02057X/1. EP/N02057X/1 2022-10-31T20:08:20.7929559 2022-04-13T17:23:46.7141784 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering E. Faraggiana 1 J.C. Chapman 0000-0002-9531-5691 2 Alison Williams 0000-0002-2494-1468 3 C. Whitlam 4 Ian Masters 0000-0001-7667-6670 5 59821__24014__8ae9ff91cd714f06b426befea482352a.pdf 59821.pdf 2022-05-06T14:41:35.0070940 Output 8160291 application/pdf Version of Record true © 2022 The Authors. This is an open access article under the CC BY license true eng http://creativecommons.org/licenses/by/4.0/
title	Investigation of new layout design concepts of an array-on-device WaveSub device
spellingShingle	Investigation of new layout design concepts of an array-on-device WaveSub device Alison Williams Ian Masters
title_short	Investigation of new layout design concepts of an array-on-device WaveSub device
title_full	Investigation of new layout design concepts of an array-on-device WaveSub device
title_fullStr	Investigation of new layout design concepts of an array-on-device WaveSub device
title_full_unstemmed	Investigation of new layout design concepts of an array-on-device WaveSub device
title_sort	Investigation of new layout design concepts of an array-on-device WaveSub device
author_id_str_mv	cb1b1946eccac3bbf7592d6ab1c4d065 6fa19551092853928cde0e6d5fac48a1
author_id_fullname_str_mv	cb1b1946eccac3bbf7592d6ab1c4d065_*_Alison Williams 6fa19551092853928cde0e6d5fac48a1_*_Ian Masters
author	Alison Williams Ian Masters
author2	E. Faraggiana J.C. Chapman Alison Williams C. Whitlam Ian Masters
format	Journal article
container_title	Renewable Energy
container_volume	190
container_start_page	501
publishDate	2022
institution	Swansea University
issn	0960-1481
doi_str_mv	10.1016/j.renene.2022.03.126
publisher	Elsevier BV
college_str	Faculty of Science and Engineering
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description	Wave Energy Converters (WECs) have not yet proven their competitiveness in the mainstream energy market. Research and development of this technology are necessary to find optimal solutions in terms both of energy produced and reduced cost. A WEC farm is expected to have reduced Levelized Cost of Energy (LCoE) compared to individual devices due to shared installation and grid connection costs. Studies show that energy yield of a WEC array is highly dependent on spacing and layout of the WECs. A method for selecting an optimal array layout is desirable.Here we show a comparison between 4 different design layouts of a WaveSub device with six floats. A six float configuration has been chosen because the LCoE reduces with increasing floats per device as shown in previous research. An optimal configuration in terms of LCoE and rated power is found for linear, rectangle, triangle and circular multi-float configurations. Parameters optimised are float spacing and Power Take Off (PTO) stiffness, damping and rated power. The optimisation algorithm uses a genetic algorithm combined with a Kriging surrogate model. Numerical simulations are solved in the time-domain in WEC-Sim while the hydrodynamic coefficients are calculated in Nemoh using a linear potential flow theory.For all geometric configurations, the smallest float spacing was the most promising because of the lower cost of the structure. In fact, the influence of the float spacing on the power produced by the device is shown to be less significant than the influence of float spacing on the capital cost. Overall, the circular configuration outperformed the other configurations. This study shows that layout configurations can be investigated with optimisation and this could be applied to other configurations and other WEC concepts in future.
published_date	2022-05-01T04:17:24Z
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score	11.01353

Investigation of new layout design concepts of an array-on-device WaveSub device

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