Table of Contents
Why is Swansea Bay good for tidal energy?
A tidal lagoon is a ‘U’ shaped breakwater, built out from the coast which has a bank of hydro turbines in it. Water fills up and empties the man-made lagoon as the tides rise and fall. We generate electricity on both the incoming and outgoing tides, four times a day, every day.
What happened to Swansea tidal lagoon?
The scheme received planning permission in 2015 but, despite an offer from the Welsh Government to invest £200m, the UK Government scrapped plans for the lagoon in 2018 citing the high cost of the energy produced.
What type of sustainable energy was planned for Swansea Bay?
Tidal Lagoon Swansea Bay was a proposed tidal lagoon power plant that was to be constructed in Swansea Bay off the south coast of Wales, United Kingdom. Development consent was granted by the UK government in June 2015, and in June 2018 the Welsh Government approved the plan and offered to invest £200 million; however.
How much will the Swansea tidal lagoon cost?
£1.3bn
The tidal lagoon proposed for Swansea Bay is estimated to have an annual electricity output of around 0.52 TeraWatt Hours (i.e. 0.52 billion units of energy). The developer’s estimated capital cost is £1.3bn.
Is Cardiff bay tidal?
Harnessing the second highest tidal range in the world The Cardiff Tidal Lagoon is being developed as the first full-scale lagoon in our programme. Located in the Severn Estuary, the project seeks to harness the second highest tidal range in the world.
How does a tidal lagoon work?
A tidal lagoon is a power station that generates electricity from the natural rise and fall of the tides. Tidal lagoons work in a similar way to tidal barrages by capturing a large volume of water behind a man-made structure which is then released to drive turbines and generate electricity.
How does the tidal lagoon work?
What can a tidal barrage do?
Instead of damming water on one side like a conventional dam, a tidal barrage allows water to flow into a bay or river during high tide, and releases the water during low tide. This is done by measuring the tidal flow and controlling the sluice gates at key times of the tidal cycle.
Can Cardiff Bay Flood?
Cardiff has a large coastline that is constantly changing. The weather and tides can erode the natural protection that the coast provides us. At high tides and during storms the risks of flooding and erosion of our coast line are increased.
What are the cons of tidal energy?
Disadvantages of Tidal Energy
- Initial construction cost is very high.
- Formation of silt behind the barrage.
- Effect on animals and plants living near tidal stations.
- Very few suitable sites for constructing barrages.
- Disturbs migration of living creatures in the ocean.
Is tidal barrage expensive?
Because of the early stage of the technology, tidal power is an expensive source of energy: according to a 2019 study, commercial-scale tidal energy is estimated to cost $130-$280 per megawatt-hour,1 compared to $20 per megawatt-hour for wind.
Why is tidal energy not widely used?
The main disadvantages of tidal power are that there are limited installation sites, it is expensive, the turbines can impact the surrounding ecosystem, and the power produced does not always match up with peak energy demand.