Document Detail


Optimization of multiple turbine arrays in a channel with tidally reversing flow by numerical modelling with adaptive mesh.
MedLine Citation:
PMID:  23319710     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
At tidal energy sites, large arrays of hundreds of turbines will be required to generate economically significant amounts of energy. Owing to wake effects within the array, the placement of turbines within will be vital to capturing the maximum energy from the resource. This study presents preliminary results using Gerris, an adaptive mesh flow solver, to investigate the flow through four different arrays of 15 turbines each. The goal is to optimize the position of turbines within an array in an idealized channel. The turbines are represented as areas of increased bottom friction in an adaptive mesh model so that the flow and power capture in tidally reversing flow through large arrays can be studied. The effect of oscillating tides is studied, with interesting dynamics generated as the tidal current reverses direction, forcing turbulent flow through the array. The energy removed from the flow by each of the four arrays is compared over a tidal cycle. A staggered array is found to extract 54 per cent more energy than a non-staggered array. Furthermore, an array positioned to one side of the channel is found to remove a similar amount of energy compared with an array in the centre of the channel.
Authors:
T Divett; R Vennell; C Stevens
Publication Detail:
Type:  Journal Article     Date:  2013-01-14
Journal Detail:
Title:  Philosophical transactions. Series A, Mathematical, physical, and engineering sciences     Volume:  371     ISSN:  1364-503X     ISO Abbreviation:  Philos Trans A Math Phys Eng Sci     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-01-15     Completed Date:  2013-02-21     Revised Date:  2013-04-24    
Medline Journal Info:
Nlm Unique ID:  101133385     Medline TA:  Philos Trans A Math Phys Eng Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  20120251     Citation Subset:  -    
Affiliation:
Ocean Physics Group, University of Otago, PO Box 56, Dunedin, New Zealand. tim.divett@niwa.co.nz
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