The Anonymous Widower

Ørsted Signs Two ‘Industry First’ Monopile Contracts For Hornsea 3 Foundations

The title of this post, is the same as that of this press release from Ørsted.

This is the introductory paragraph.

Ørsted, the world’s most sustainable energy company, has signed two ‘industry first’ contracts for the fabrication of XXL monopile foundations for the Hornsea 3 offshore wind farm.

I have a few thoughts about the press release.

XXL Monopile Foundations

These four paragraphs describe Hornsea 3’s XXL monopile foundations.

Subject to Ørsted taking a Final Investment Decision on Hornsea 3, the contracts have been finalised with Haizea Wind Group, through its subsidiary Haizea Bilbao, and SeAH Wind Limited, a UK-based subsidiary of SeAH Steel Holdings (SeAH).

Ørsted will be the first major customer at SeAH Wind’s new monopile facility in Teesside, and the agreement with Haizea marks the company’s first XXL monopile contract with Ørsted.

The deal with SeAH represents the single largest offshore wind foundations contract secured by any UK company. Haizea’s agreement is the largest single contract ever secured by Haizea Wind Group.

Each of the huge foundation structures for Hornsea 3 will weigh between 1,300 and 2,400 tonnes and measure in at between 83 and 111 metres in length. Monopile production is expected to start in 2024.

Note

  1. These are huge steel structures.
  2. But then the water depth appears to be between 36 and 73 metres.
  3. It looks like the orders are shared between Spanish and Korean companies

This article on offshoreWIND.biz, is entitled Beyond XXL – Slim Monopiles For Deep-Water Wind Farms.

These are some points from the article.

  • XXL-Monopiles have been successfully used for water depths of up to 40 metres. Now wind farm developers need monopiles “beyond XXL”.
  • The extension of the range is needed, mainly to enable the use of larger turbines, deeper water, and harsher environmental situations.
  • These monopiles will allow turbines of up to 15 megawatts with rotor diameters of up to 230 metres.
  • This monopile design automatically induces the idea of design and fabrication optimisation to ensure that monopiles continue to lead the ranking of most economical foundation systems.

In the 1970s, I was involved with a Cambridge University spin-out company called Balaena Structures, who were using similar much larger structures to support oil and gas production platforms.

I was just doing calculations, but I do wonder if these XXL monopile foundations, owe things in their design to work done by structural engineers, like those I met at Cambridge fifty years ago.

 

October 2, 2022 - Posted by | Design, Energy | , , , , ,

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