This site uses cookies. By continuing to use this site you agree to our use of cookies. To find out more, see our Privacy and Cookies policy.
Skip to the content

[IOP] A community website from IOP Publishing

Tag Archives: tidal barrage

Could tidal power be big?

By Dave Elliott

IRENA, the International Renewable Energy Agency, puts the technically available global tidal resource at near 1 TW. That is for all types of tidal system, those using vertical tidal ranges (barrages and lagoons) and those based on tidal streams, using the horizontal ebbs and flows (tidal current turbines). In practice, local limitations, access problems and other constraints will limit what may actually be achievable. So how much might be available? (more…)

Posted in Renew your energy | Tagged , , , , , , , | Leave a comment | Permalink
View all posts by this author  | View this author's profile

Green power in Asia – Part 2

By Dave Elliott

In my last post I looked at developments in China and India, where renewables have been playing key and increasing roles, with China clearly in the lead. By contrast, until recently, in Japan renewables had been given a low priority, but following the Fukushima nuclear disaster in 2011, Japan is now pushing ahead with some ambitious offshore wind projects, 1.45GW in all, using floating wind turbines, and a large solar PV programme, helped by lucrative Feed In Tariff subsidies. (more…)

Posted in Renew your energy | Tagged , , , , , | 2 Comments | Permalink
View all posts by this author  | View this author's profile

Tidal energy and grid balancing

by Dave Elliott

There has been a renewed push for a Severn Tidal Barrage, but, as I have reported in earlier posts, many saw it as too big to fund and too invasive to allow. Dr Nicholas Yates from the National Oceanography Centre, who has carried out the research with a team at Liverpool University, has backed smaller barrages, which he suggested could supply 15% of UK electricity. He  told the BBC: ‘I think it’s unfortunate that attention for tidal range has tended to focus on the Severn, it’s the wrong place to start, it’s too big. Start small, it’s what the Danes did with wind – start small, learn quick and build up.’

(more…)

Posted in Renew your energy | Tagged , , , , , , , | Leave a comment | Permalink
View all posts by this author  | View this author's profile

Tidal power – and energy storage

By Dave Elliott

Tidal energy is developing relatively slowly, but has a significant potential. Although two large tidal barrages now exists  (with 240 MW units in France and South Korea), the emphasis is on free-standing tidal current turbines, which  harvest the horizontal flow of the tides, rather than trapping tide rises behind dams, as with barrages. So the environmental impact is likely to be much less. They can also be installed relatively quickly, one by one, so reducing project finance problems. The 6th Tidal Summit, organised by TidalToday in Nov 2012, reviewed the scene, with a key issue being the need to get costs down. DECC said they has to get to down below £100/MWh by around 2025.

(more…)

Posted in Renew your energy | Tagged , , , , | Leave a comment | Permalink
View all posts by this author  | View this author's profile