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Economic aspects of latching control for a wave energy converter with a direct drive linear generator power take-off
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
2018 (English)In: Renewable energy, ISSN 0960-1481, E-ISSN 1879-0682, Vol. 128, no Part A, p. 57-67Article in journal (Refereed) Published
Abstract [en]

A wave energy converter (WEC) should be controlled in order to increase the average output power. In this paper, economic aspects of latching applied to a point absorbing WEC with a linear generator power take-off (PTO) are discussed. The capacity utilisation factor (CUF) is suggested to be used along with average absorbed power for control optimisation. Optimum and suboptimum latching controls are assessed for the WEC and compared with a constant damping PTO force control. The WEC performance is simulated using monochromatic waves for the wave conditions of the Wave Hub test site, UK. The linear wave theory is used in a hydro-mechanical two-body simulation model. It is shown that the latching controls possess considerable practical challenges significantly increasing the return of investment time periods.

Place, publisher, year, edition, pages
2018. Vol. 128, no Part A, p. 57-67
National Category
Marine Engineering
Identifiers
URN: urn:nbn:se:uu:diva-351461DOI: 10.1016/j.renene.2018.05.041ISI: 000437079600006OAI: oai:DiVA.org:uu-351461DiVA, id: diva2:1209970
Funder
Swedish Research Council, 2015-03126Swedish Energy AgencyStandUpÅForsk (Ångpanneföreningen's Foundation for Research and Development), 17-550Available from: 2018-05-25 Created: 2018-05-25 Last updated: 2018-12-12Bibliographically approved
In thesis
1.
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2. Wave Powered Desalination
Open this publication in new window or tab >>Wave Powered Desalination
2018 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

The aim of this licentiate thesis is to investigate opportunities to produce fresh-water and electricity using marine renewable energy sources, such as wave power and marine current power, for water scarce areas. It summarizes the ongoing work within the field and suggests some possibilities of future re-search. Specifically, the desalination process reverse osmosis has been dis-cussed in combination with the wave energy concept designed at Uppsala Uni-versity for a site by the Kenyan coast. A review on wave powered desalination systems was presented, and the wave climate of the Kenyan coast was reana-lyzed and discussed with respect to the wave power and desalination applica-tion. Also, the magnetic circuit of the linear generator was investigated, as well as the control of the system, to enhance its sustainability. Moreover, the marine current energy converter designed at Uppsala University was investi-gated for desalination purposes. Only literature studies and simulations were performed, and the research would benefit from experimental work.

Place, publisher, year, edition, pages
Uppsala: Uppsala universitet, 2018
Series
UURIE / Uppsala University, Department of Engineering Sciences, ISSN 0349-8352 ; 354-18L
Keywords
wave power, desalination, marine renewable energy sources, marine current, freshwater
National Category
Engineering and Technology
Research subject
Engineering Science
Identifiers
urn:nbn:se:uu:diva-369356 (URN)
Presentation
2018-11-15, 2005 Ångströmlaboratoriet, Lägerhyddsvägen 1, Uppsala, 13:15 (English)
Opponent
Supervisors
Funder
Swedish Research Council, 2015-03126StandUp
Available from: 2018-12-12 Created: 2018-12-12 Last updated: 2018-12-12Bibliographically approved

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Temiz, IrinaLeijon, JenniferBoström, Cecilia

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