ME1—marine energy extraction: tidal resource analysis

Bryden, Ian; Couch, Scott

doi:10.1016/j.renene.2005.08.012

Cited by 140 publications

(69 citation statements)

References 1 publication

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“…The technical tidal current energy resource was calculated only for sites with a tidal current peak velocity greater than 1.5 m/s [25,26]. This velocity was selected based on the current status of tidal current turbines.…”

Section: Technical Tidal Current Energy Resourcementioning

confidence: 99%

Tidal current energy resource assessment in Ireland: Current status and future update

O'Rourke¹,

Boyle²,

Reynolds³

2010

Renewable and Sustainable Energy Reviews

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Section: Technical Tidal Current Energy Resourcementioning

confidence: 99%

Tidal current energy resource assessment in Ireland: Current status and future update

O'Rourke¹,

Boyle²,

Reynolds³

2010

Renewable and Sustainable Energy Reviews

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“…Variations in velocity of a marine current will typically be very predictable and depend mainly on the driving forces of the current and local bathymetry. Tidal currents will vary between standstill and maximum spring velocities that in a few extreme cases are up to 7 m/s, but in more locations are in the order of 2-3 m/s [11]. For tides the direction of the flow will also vary.…”

Section: A Resource Characteristicsmentioning

confidence: 99%

Matching a Permanent Magnet Synchronous Generator to a Fixed Pitch Vertical Axis Turbine for Marine Current Energy Conversion

Yuen

Thomas

Grabbe

et al. 2009

IEEE J. Oceanic Eng.

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This is an author-produced version of a paper published in IEEE Journal of Oceanic Engineering. This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination.Citation for the published paper: Yuen K., Thomas K., Grabbe M., Deglaire P., Bouquerel M., Österberg D., Leijon M. "Matching a permanent magnet synchronous generator to a fixed pitch vertical axis turbine for marine current energy conversion" IEEE Journal of Oceanic Engineering, 2009, 34(1) Access to the published version may require subscription. I. INTRODUCTIONF REE flow marine currents, i.e. unregulated water courses, tides and other ocean currents, are an energy resource yet to be utilized on a commercial scale. Without dams, this nonfossil source can give an environmentally benign contribution to the world electricity production. The European tidal potential alone has been estimated to be 39-58 TWh annually [1]- [3]. A number of projects involved with extracting energy from this resource exist, and most concepts are similar to wind energy converters in that they include a turbine and a generator, e.g. [4]- [7].Wind power is similar to marine current energy as it is concerned with harnessing the kinetic energy in a flowing fluid, and there are many relevant comparisons concerning underlying physics, practical engineering experience, etc. However, there are also a number of significant differences, e.g. resource characteristics. As most parts of the system will be submerged in water and thus not easily accessible, it is good to try to minimize needs for maintenance and repair by avoiding mechanically complex systems with many moving parts. In [8], it is concluded that up to 20 percent of the downtime for a wind power plant is due to gearbox failures, and that the majority of these failures are due to wear. Therefore, avoiding gearboxes, yawing and blade pitching is likely to be beneficial Manuscript

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“…Tidal energy has the advantage of predictability over large time scales and, as a result, is an excellent choice as a base-load energy supply [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Ireland’s tidal energy resource; An assessment of a site in the Bulls Mouth and the Shannon Estuary using measured data

O'Rourke

Boyle²,

Reynolds³

2014

Energy Conversion and Management

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The issues associated with Ireland's over reliance on fossil fuels to meet energy demands have sparked an interest in renewable energy. Renewable energy resources typically are intermittent and vary significantly in energy intensity. Tidal energy however has the advantage of predictability over large time scales and high power densities. A study of Ireland's tidal-current-energy resource has identified several viable sites. As part of this resource assessment, Acoustic Doppler Current Profilers were installed at two locations along Ireland's west coast, at a site in the Bulls Mouth and the Shannon Estuary. The Acoustic Doppler Current Profilers measured tidal current speed and direction at 30 minute intervals over a 30 day period at a range of depths through the water column. This is the first time the measured data appears in the literature as it has only recently been made public. This paper presents tidal current speed and direction, frequency of occurrence of speed, tidal roses at several depths through the water column, and a comparison of theoretical tidal-current-speed profiles with measured data for a site in the Bulls Mouth and in the Shannon Estuary. The paper compares power density at both sites over a lunar month and also proposes a best fit power law exponent with the measured data through the water column. Finally, the paper presents an energetic performance comparison for a tidal current turbine operating at both sites. The data presented in this paper can be used in the design process to estimate the hydrodynamic and structural performance of a tidal current turbine operating under real-life conditions. The data can also be used to assess different control strategies and to design a tidal current turbine to suit the site-specific characteristics.

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ME1—marine energy extraction: tidal resource analysis

Cited by 140 publications

References 1 publication

Tidal current energy resource assessment in Ireland: Current status and future update

Tidal current energy resource assessment in Ireland: Current status and future update

Matching a Permanent Magnet Synchronous Generator to a Fixed Pitch Vertical Axis Turbine for Marine Current Energy Conversion

Ireland’s tidal energy resource; An assessment of a site in the Bulls Mouth and the Shannon Estuary using measured data

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