Super-Sizing Offshore Wind€¦ · DNV GL © IMCA Marine Renewable Energy Seminar –September 2019 New methods 13 The WTS can provide a “one-piece” installation service for wind

DNV GL © IMCA Marine Renewable Energy Seminar – September 2019 SAFER, SMARTER, GREENERDNV GL ©

Mark Hayward

25 September 2019

IMCA Marine Renewable Energy Seminar – September 2019

Super-Sizing Offshore Wind

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Working together for safe & efficient operations

DNV GL © IMCA Marine Renewable Energy Seminar – September 2019

Sheltered Beginnings – 96/97

▪ Vindeby (“Vind-i-bu”)

Statistics:

▪ 11 x 0.45MW turbines

▪ 2-7m waterdepth

▪ Concrete gravity base

▪ Installed with floating crane

▪ 35m Nacelle height

Result: Success – Reportedly 20% more power than

size similar turbines on land so paved the way forward

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Vindeby


Full Lifecycle

▪ Now fully decommissioned (2017-18)

Some Learnings:

▪ It was possible & it worked !

▪ Installation – possible but how to scale

▪ O&M – more than expected (Crew transfer)

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Turbine Size is key: “Vindeby produced 243GWh of power in its 26-year lifetime… equivalent to what seven of the largest offshore wind turbines can produce in a year”

Wind Power March ‘17


Industry leaps and bounds

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Open ocean – Source Dong Energy


Turbine Sizing

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BBC News May 2019

▪ Beatrice completed in May 2019

▪ 84 x 7MW Turbines

▪ Power 450,000 homes


Industry leaps and bounds

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Open ocean – Source Dong Energy

Near Future !



The “First” purpose built (2003)

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▪ 6 Legs

▪ 130m long – 600t crane

▪ DNV Classed


Jackups & Windfarm Installation Vessels

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Leg length: 3 x 85m

Size: 53m x 35m

Payload: 450t

Waterdepth: 40/69m

Wave Height: <small>

Leg length: 4 x 94m

Size: 80m x 36m

Payload: 900-1,600t

Waterdepth: 40-65m

Wave Height: <medium>

Leg length: 4 x 105m

Size: 139m x 50m

Payload: 8,000t

Waterdepth: 65m

Wave Height: 50-Year

Liftboat Medium WTIV Large WTIV

Source: Hercules offshore Source: GMS offshore contractors Source: Seajacks (2015)

▪ Liftboats

▪ Jackups

▪ Purpose built


Large purpose built Jackups

▪ 8,400-tonne payload

▪ 1,200-tonne crane

Designers GustoMSC and

Keppel OTD both working on

new designs

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Attractive opportunities – North Sea Tigers changing their stripes

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Oct 2017

May 2018

“We have been investing in renewables for many years - and our focus today is on biofuels, biopower, wind energy and solar energy”

Shell, Innogy and Stiesdal Offshore Technologies to build new floating wind demonstration projectFinal investment decision taken on €18 million investment to test TetraSpar floating foundation concept off the Norwegian coast


A new approach ?

▪ Or doing things differently

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New methods

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The WTS can provide a “one-piece” installation service for wind turbines, as well as jacket foundations, piles, and other components. Unlike other wind farm installation vessels, the WTS has a small waterplane area twin hull (SWATH) design, DNV GL said.

This results in very low resistance at the design draught (16m) and excellent seakeeping performance, good motion behaviour characteristics, and high transit speed of 14 knots.Capable of transporting and installing two fully assembled wind turbines or two wind turbine foundations, the vessel has a highly redundant dynamic positioning system installed and the wind turbine hoist tackles are equipped with an active system to compensate for the heave motion of the vessel, according to DNV GL.


And Deeper water

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▪ Floating wind successfully demonstrated

Norway 2009 & Scotland 2017


Making Headlines

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Guardian April 2018



Global Ambition

▪ Small scale near-shore

▪ Round 1,2 & 3 (+)

▪ Deeper water

▪ Overseas

▪ America’s Jones Act – opportunity

▪ Taiwan / Japan

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Block Island

5 x 6MW installed

Summer 2016

Powers 17,000 homes

Formosa 1 Phase 2

First power Sept ‘19


Crew Transfer – Let’s not forget the Human Factor

▪ CTV

▪ Positive thrust / Push-on

▪ Working at sea

(and commute)

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Crew Transfer

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CTV’s - Swath

▪ New concepts to challenge larger vessels:

▪ Swath CTV for Round 3 windfarms, running

and transferring in 3m high seas

▪ “Motions during transit and transfer are

sufficiently low to prevent seasickness and

fatigue in the higher sea states.”

▪ https://www.oceannews.com/news/energy/swath-ctvs-to-meet-future-windfarm-

requirements [18 Jan ‘18]

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Ad Hoc Marine Designs

https://www.oceannews.com/news/energy/swath-ctvs-to-meet-future-windfarm-requirements%20%5b18


New / novel concepts

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SAFER, SMARTER, GREENER

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Looking ahead to an exciting and innovative future

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Mark Hayward

[email protected]

+44 20 3816 4855

mailto:[email protected]

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Super-Sizing Offshore Wind€¦ · DNV GL © IMCA Marine Renewable Energy Seminar –September 2019 New methods 13 The WTS can provide a “one-piece” installation service for wind