Results 31 to 40 of about 27,968 (220)
Tidal Energy: The benthic effects of an operational tidal stream turbine
Marine Environmental Research, 2017 The effect of modified flow on epifaunal boulder reef communities adjacent to the SeaGen, the world's first grid-compliant tidal stream turbine, were assessed. The wake of the SeaGen was modelled and the outputs were used in conjunction with positional and substrate descriptor variables, to relate variation in epifaunal community structure to the ...
J.P.J. O'Carroll +3 more
openaire +5 more sources
Performance of Pitch and Stall Regulated Tidal Stream Turbines [PDF]
IEEE Transactions on Sustainable Energy, 2014 Controllers for a pitch and a stall regulated horizontal axial flow, variable-speed tidal stream turbine are developed, and a performance comparison is carried out. Below rated flow speed, both turbines are operated in variable-speed mode so that the optimum tip-speed ratio is maintained. One of the turbines has variable pitch blades, which above rated
Whitby, Benjamin +1 more
openaire +1 more source
Design and testing of a contra-rotating tidal current turbine [PDF]
, 2005 A contra-rotating marine current turbine has a number of attractive features: nearzero reactive torque on the support structure, near-zero swirl in the wake, and high relative inter-rotor rotational speeds.
Clarke, J. A. +3 more
core +4 more sources
Analysis of the kinetic energy recovery behind a tidal stream turbine for various submergence levels
International Marine Energy Journal, 2022 Tidal turbines are commonly deployed at sea sites with water depths of up to 50 m to ease their deployment and quick maintenance operations. In these relatively shallow water depth conditions, the vertical expansion of tidal stream turbine wakes is ...
Pablo Ouro +2 more
doaj +1 more source
Hydrodynamic Impacts of a Marine Renewable Energy Installation on the Benthic Boundary Layer in a Tidal Channel [PDF]
, 2017 Peer reviewedPublisher ...
Fraser, Shaun +3 more
core +1 more source
The parameterisation of turbulence in the marine environment [PDF]
, 2016 There are many problems in the fields of flow modelling around structures and tidal stream energy yield analysis which require a thorough understanding of the turbulent and time-averaged flow speeds in marine environments.
Hardisty, Jack, Jennings, Ross
core +1 more source
Turbulence and Wake Effects in Tidal Stream Turbine Arrays [PDF]
Volume 10: Ocean Renewable Energy, 2018 Electricity generation from tidal current can provide a reliable and predictable addition to a reduced carbon energy sector in the future. Following the deployment of the first multi-turbine array, significant cost reduction can be achieved by moving beyond demonstrator projects to large scale tidal turbine arrays.
Nuernberg, Martin, Tao, Longbin
openaire +1 more source
Tidal stream turbine power capping in a head-driven tidal channel [PDF]
Renewable Energy, 2019 Abstract An array of ten 1 MW turbines, with a one diameter inter-turbine spacing, is simulated in a hypothetical tidal channel using the depth-averaged flow solver TELEMAC-2D. It has been shown for idealised turbines that mean power extraction from tidal channels can be enhanced by tuning turbine resistance for a given channel.
Vogel, C, Willden, R, Houlsby, G
openaire +2 more sources
Characterisation of underwater operational sound of a tidal stream turbine [PDF]
The Journal of the Acoustical Society of America, 2020 The underwater sound emitted during the operation of the Atlantis AR1500 turbine, a 1.5 MW three bladed horizontal axis tidal-stream turbine, was measured in the Pentland Firth, Scotland. Most sound was concentrated in the lower frequencies, ranging from 50 to 1000 Hz. Within 20 m of the turbine, third-octave band sound pressure levels were elevated by
Denise, Risch +3 more
openaire +2 more sources
Incorporation of a Non-Constant Thrust Force Coefficient to Assess Tidal-Stream Energy
Energies, 2019 A novel method for modelling tidal-stream energy capture at the regional scale is used to evaluate the performance of two marine turbine arrays configured as a fence and a partial fence.
Lilia Flores Mateos, Michael Hartnett
doaj +1 more source