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  • Wind Energy: Storage Balls On The Seabed

Wind Energy: Storage Balls On The Seabed

Written by  TheCivilEngineer.org
Published in News on Projects / Industry
Wind Energy: Storage Balls On The Seabed
22
October

The method that is currently being used to store wind energy is pumped storage: the surplus of wind power is used to pump water from a hydrant tank (lower tank) to a water reservoir tank (top tank) and it is stored as water at a high level.

This water is released during peak demand or when there is apnea so as to help a turbine to generate energy and to come back to the intake tank.

The pumped-storage technology is considered reliable in technical and economic terms, it is completely environmentally friendly and can be easily installed in areas that have the appropriate topography and water resources.

But what happens in the case of offshore wind energy produced by wind turbines installed at sea?

This question has a particular importance for the future of this technology as in the first half of 2015 in Europe there was greater offshore wind power than any other year since several large projects were completed and the installation of larger wind turbines achieved.

In numbers, the first half of 2015 almost 2342.90 megawatts were settled down, power three times as the installed during the same period last year. As a result, the installed offshore wind capacity in Europe stood at 10393.60 megawatts of 82 offshore wind farms in eleven countries.

Germany aims to wean completely from nuclear power in the next decade and led for decades in both photovoltaics and wind power (along with Denmark).

In this context the Germans develop storage solutions for wind energy at sea. In particular, the construction company Hochtief is working with researchers of the Fraunhofer Institute on a project called ‘Stensea’ (Stored Energy in the Sea- Energy Saving Sea). The aim is to develop a large-scale pumped-storage technology offshore.

The core of the compensatory power plant consists of 200 hollow spherical reservoirs, which are made of concrete and are fastened to the seabed near the offshore wind farm.

When the wind blows, the balls remain empty. In case of low wind production, the giant 30-meter diameter balls inundated with water and generate power through the movement of a "piston" inside.

The power of each system is estimated at 20 megawatts. To ensure the short-term energy supply in nationwide level there are required up to 200 such balls with total storage capacity of four gigawatts.

According to current projections, there could be constructed such a gigantic modern facility for offshore wind turbines in five to ten years.

 

Source: econews

More in this category: « Energy Upgrading In Buildings Saves Billion Euros From Energy Production The First Industrial-Scale Plant For Capturing Carbon Dioxide »
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Tagged under
  • wind turbine
  • Wind Power
  • offshore construction
  • Stensea

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