Different solutions are being worked on to establish the future energy islands in the North Sea and on Bornholm respectively. The two solutions are a platform solution and a so-called contained island solution.
And there is a difference in the price estimates for the different solutions, Dan Jørgensen stated in a response to the Climate, Energy and Utilities Committee in response to a query from Egil Hulgaard (C). The consultancy company COWI has made the price estimates.
A 3 GW platform solution is estimated at a price of 12 billion. DKK, while a 10 GW platform solution is estimated at 38 billion. DKK. This is based on known technology, including that the platforms are established as 1 GW platforms.
The estimated price for a so-called contained island for 3 GW with an associated port is 12 billion. DKK. A dammed island for 10 GW with an associated port is estimated at DKK 29 billion. It is assumed here that the island is constructed from a periphery of sunken concrete elements with sand filling, and that the island at 3 GW will be 18 ha, while the island at 10 GW will be 46 ha, according to the response from the Danish Energy Agency, which Dan Jørgensen forwarded to the committee.
The criteria for a dammed island have been taken into account and are comparable to the prices for platform solutions.
The minister's response points out that the price estimate for both construction types is subject to considerable uncertainty.
Here are the two possible solutions for energy islands for which price estimates have been given:
- The platform solution: With this solution, the island structure can consist of a number of centrally located steel platforms that stand on steel or concrete foundations on the seabed. Platform design concepts are well-known and widespread in both the oil, gas and offshore wind sectors.
- Contained island solution: With this solution, an artificial island is established in the sea by confining a relevant area, after which the water is displaced and the area is filled with sand.
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