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Archive for the category “wind”

TFliner XL

It is possible to install an offshore wind-turbine without the use of a sophisticated but expensive self-lifting sea-jack ship, like the Aeolus (see video at the bottom of this post). During installation the ship is held in place with the DP-2 dynamic positioning system.

[] – Dynamic positioning

Fourfold functionality TFliner XL for offshore wind turbine installations:

1. installing monopile foundation
2. installing transition pieces
3. installing jacket type foundations
4. reel-lay spread

The ship can handle 75 m monopiles of max. 900 ton, jacket type foundations of 600 ton and transition pieces of 300 ton.

[] – TFliner XL data sheet

Suction Bucket Foundation Offshore Wind Turbines

Advantages 8 m deep suction buckets over 25-30 m deep hammered monopiles: no noise, easier to decommission. Suitable for water depths of 30-60 m and larger wind-turbines like 10 MW.

Suction caissons (also referred to as suction anchors, suction piles or suction buckets) are a new form of fixed platform anchor that have a number of advantages over conventional offshore foundations, mainly being quicker to install than deep foundation piles and being easier to remove during decommissioning. Suction caissons are now used extensively worldwide for anchoring large offshore installations, like oil platforms, offshore drillings and accommodation platforms to the seafloor at great depths. In recent years suction caissons also see usage for offshore wind turbines in more shallow waters.

[] – how the ‘suction bucket’ technique works (Guardian)

[] – Suction caisson

Read more…

Lagerwey Wind Turbines

The Netherlands has a rich tradition in exploiting wind energy, reaching back to the 14th century. However in modern times no Dutch big names operate in the wind energy sector. This probably has to do with the huge natural gas reserves that were discovered in the sixties and of course with the presence of Royal Dutch Shell. But smaller wind turbine builders do exist in the Netherlands: Lagerwey.

[] – Lagerwey
[] – L136-4.0-4.5MW
[] – Russia’s Rosatom links with Lagerwey for 610MW of wind
[] – Russen kopen Nederlandse windmolens

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Sif Awarded Trianel Windpark Borkum II Monopile Contract

Sif Group in Roermond, the Netherlands, has been awarded to deliver all required 32 monopiles of 1,000 ton each, carrying 6.2M152 turbines. The new windpark Borkum-II will be located in the German sector of the North Sea and will have a nameplate power of 203 MW.

1 monopile: think 1200 cars worth of steel.

[] – Sif-Smulders Team Bags Trianel Windpark Borkum II Contract
[] – Sif to Build Trianel Windpark Borkum II Monopiles
[] – Trianel Windpark Borkum
[] – Company site

Sif Group is expanding its offshore activities from Roermond in the East of the country to the newly build reclaimed land Maasvlakte.

Read more…

Report – Upbeat Assessment European Offshore Wind

Estimated cumulative national installed offshore wind capacity by 2030

An new report titled “Unleashing Europe’s offshore wind potential” by London-based renewable energy consultancy BVG Associates paints an optimistic picture for the European offshore wind sector. Currently we have 12.6 GW installed in shallow European waters. By 2030 the offshore wind share to the EU electricity production could be 7-11%, which constitutes merely a fraction of the true potential of three European bassins: the Baltic, North Sea and Atlantic from France to the north of the UK.

Three offshore wind basins considered

Key findings for offshore wind:

  • Between 2,600 and 6,000 TWh/year can be generated at a cost of €65/MWh or below, corresponding with between 80% and 180% of Europe’s electricity demand with 2030 technology.
  • Of that amount 25% of the EU’s electricity demand could be met at an average of €54/MWh in the most favorable locations.
  • The industry has achieved unprecedented levels of competitiveness through rapid progress in technology, industrial growth and a reduction in the cost of capital.

LCOE (levelized cost of energy)

[] – Company site

The 64p pdf report, free download in return for your email address:

Floating Wind Turbines

For shallow waters like in the North Sea, fixed monopile-based wind turbines are preferred. But for deeper waters this option doesn’t exist. Nevertheless there are very lucrative wind locations, for instance between Britain and Norway or West of Ireland in the Atlantic and that’s just Europe. With floating wind turbines these wind resources can be utilized as well.

Currently many floating wind turbine projects are in the pipeline:

Floating Wind Projects

Project name Capacity Country Expected commissioning date
Hywind Scotland 30 MW Scotland 2017
Kincardine 48 MW Scotland From 2018
Dounreay Tri 2 x 5 MW Scotland 2018
WindFloat Atlantic 30 MW Portugal 2018-2019
French pre-commercial farms 4 x 25 MW France 2020
Atlantis/Ideol project 100 MW UK 2021
Gaelectic 30 MW Ireland 2021

[] – European Floating Offshore Wind Ready For The Big Time

[] – Electrifying the future
[] – Floating Offshore Wind Vision Statement (pdf, June 2017)
[] – Floating wind turbine

Building Onshore Wind Turbine Foundations

[] – Peikko Group

Veja Mate Offshore Wind Farm Installation

[] – Veja Mate Offshore Wind Farm (402 MW)

Global Offshore Wind Speeds Ranking


Global data resource with more than 1,000 offshore locations that could be used for building wind farms. The data set is ordered after average wind speed. Every location links to information about the status of the wind farm, if any.

Spoiler: best location is Taiwan Strait.

[] – Global Offshore Wind Speeds Rankings

Country Ranking Cumulative Offshore Wind

[] – Offshore wind power

DanTysk Wind Park Installation

German language documentary about the construction of the DanTysk offshore wind park.

[] – DanTysk (“Danish-German”)

Gemini Wind Farm Live Data

Gemini, that’s the two tiny trapezoids at the top of the map, measuring together merely 68 km2. In the Dutch part of the North Sea there is enough space for many, many Gemini’s more, in theory 57,000/68=838 more or 503 GW nameplate power, that could not only easily provide the Dutch electricity needs for 100% (Dutch average electricity consumption is 12.7 GW), but additionally could turn the Netherlands in a significant electricity exporter to the rest of the EU. Average EU electricity consumption 342 GW. Note that the Dutch part is only 25% of the 200,000 km2 North Sea that cold be utilized for fixed (monopile-based) wind turbines, amounting to, in theory, 2,000 GW nameplate wind power. If you divide that number by two to account for variability and maintenance, you arrive at 1,000 GW, which is still three times the EU current electricity consumption. Note that there is also the Irish Sea and Baltic with plenty of opportunity.

Dutch part Continental Shelf of the North Sea, with 57,000 km2 larger than the Netherlands itself (41,543 km2).

Live data from the with 600 MW (currently) 2nd largest offshore wind farm in the world: Gemini in the Dutch part of the North Sea.

[] – Click this link for live data
[] – Gemini Windpark animation
[] – Gemini Wind Farm

Ten of the Biggest and the Best Wind Turbine Manufacturers


Ten companies realize ca. 75% of the global wind turbine market. The link below gives a company profile of these ten companies.

[] – Ten of the biggest and the best manufacturers

MHI-Vestas Launches 9.5 MW Offshore Wind Turbine

Mitsubishi-Vestas has launched its massive V164-9.5 MW offshore wind turbine, built on the V164 platform and capable of powering 8,300 U.K. homes. Motivation: lowering cost offshore wind. The design changes within the V164 turbine platform are minimal. One such turbine is already being tested at Burbo Bank Extension Offshore Wind Farm, United Kingdom.

Dimensions: 35-metric-ton, 80-meter blades. Hub height of 105 meters and a tip height of 187 meters. Nacelle 390-metric-ton nacelle, 20 meters long, 8 meters wide and 8 meters high.

Last December, the machine broke a world record for production by a single wind turbine when it produced 216 MWh of power in a 24-hour period. With a Danish kWh electricity price of 9 euro cent and 31 euro cent for private consumers, this is the equivalent of €19,440 c.q. €66,960. With current offshore price of 2 million euro per MW, implying 20 million euro for the V164-9.5 MW, this would mean that 300 days of consumer end price turnover would match the purchase price (not to be confused with payback period of course).

[] – MHI Vestas Launches 9.5 MW Offshore Wind Turbine
[] – MHI Vestas Launches V164-9.5 MW Offshore Wind Turbine
[] – Gigantic Wind Turbines Signal Era of Subsidy-Free Green Power
[Google Maps] – Test location V164-9.5 MW at Burbo Bank Extension Offshore Wind Farm

Overview Offshore Windparks

Wind farm name Power in MW Location Turbines Commission Date
London Array 630 United Kingdom 175 × Siemens SWT-3.6-120 2012
Gemini Wind Farm 600 Netherlands 150 × Siemens SWT-4.0 2017
Gwynt y Môr 576 United Kingdom 160 × Siemens SWT-3.6-107 2015
Greater Gabbard 504 United Kingdom 140 × Siemens SWT-3.6-107 2012
Anholt 400 Denmark 111 × Siemens SWT-3.6-120 2013
BARD Offshore 1 400 Germany 80 × BARD 5.0MW 2013
Global Tech I 400 Germany 80 × Areva Multibrid M5000 5.0MW 2015
West of Duddon Sands 389 United Kingdom 108 × Siemens SWT-3.6-120 2014
Walney (phases 1&2) 367 United Kingdom 102 × Siemens SWT-3.6-107 2011 (phase 1) 2012 (phase 2)
Thorntonbank (phases 1–3) 325 Belgium 6 × Senvion 5MW, 48 × Senvion 6.15MW 2009 (phase 1) 2012 (phase 2) 2013 (phase 3)

For an up-to-date top-25 list with additional data, like location and detailed Wikipedia wind farm description as well as a list of sites under construction, c.q. planned, go to:

[] – List of offshore wind farms

Company Profile – ‘Blue Water Shipping’ Esbjerg Denmark

Transport and logistics company situated in Esbjerg, Denmark. Blue Water Shipping (BWS) began in 1972 as a two-man company, today it has 1500 employees and 60 offices world-wide. BWS does transportation of wind turbine parts onshore and offshore, but not the final installation.

[] – Blue Water Shipping
[] – Blue Water Shipping

Wind Hub Port of Esbjerg, Denmark

This picture should give you an idea of the immense scale of North Sea wind park operations




[] – Port of Esbjerg
[Google Maps] – Esbjerg
[Google Earth] – Esbjerg

Suitable Offshore Wind Locations

Offshore wind has numerous advantages over onshore wind: higher wind speeds, easy and rapid installation once you have the proper seajack equipment, no problems with ‘not-in-my-backyard’ activists, no sacrifice of valuable land, no ‘horizon pollution’, spectacular price decay, sheer limitless potential. Below an overview of projects at an advanced planning stage.


Dutch offshore plans, more than 17 GW, the real potential is far larger. Currently 4.45 GW offshore are realized c.q. planned to be built before 2023

[source] Dutch offshore tenders

Dutch parliamentarians call for more ambitious 2023 target (up to 11 GW)

[] – Dutch MPs Call For Extension of 2023 Offshore Wind Capacity Target

Read more…

The Market for Offshore Installation Vessels

[source] Forget about North Sea oil platforms. Offshore Wind Installation Vessels Market to Hit $2.93B by 2020

The global market for offshore wind installation vessels will rise from $0.56 billion in 2014 to approximately $2.93 billion by 2020, resulting in a growth rate of 30%/year, illustrating the potential for offshore wind. The growth in installation vessels will go hand in hand with the growth of annual installed offshore wind capacity from 1.78 GW in 2014 to approximately 7.85 GW by 2020. Europe is the largest offshore wind market by far with 90% in 2013. Vessel growth from two in 2005 to more than 40 by the end of 2014.

An essential condition for this growth to continue is that the EU keeps loyal to its renewable energy policy and does not let itself deter by president Trump’s recent decision to trash the Paris Climate Accords. Instead, this act should be seen by Europe and its industry as a great opportunity to get the global upper-hand in this crucial form of energy generation, comparable to Anglo dominance in the oil industry of the 20th century (#SevenSisters).

[] – Offshore projects face vessel shortage for large turbines until 2018

September 2015 – The European offshore wind industry has a fleet of more than 75 vessels to support it, but almost half of the jack-up vessels in use are not capable of installing the 8-MW turbines now planned for some projects… Around half the fleet is not equipped to handle deep-water monopile installations, limited to a maximium depth limit of 30 metres for 3.3-MW turbines. Developers continue to convert existing vessels not originally designed to handle the new higher-capacity structures… Currently only around a dozen vessels are fully adapted for work in the offshore wind industry, the report said, and only seven in the world are capable of handling monopiles weighing more than 1,000 tons… Of 22 wind industry support vessels known to be under construction or in planning, only half a dozen have firm delivery dates.

[deepresource] – The Giants of a New Energy Age

Upgrade Aeolus Offshore Wind Installation Vessel

Damen Shiprepair yard at Schiedam in the Netherlands has been awarded to carry out the upgrading of the Van Oord Aeolus offshore wind installation vessel. The existing 900 tonnes crane will be replaced by a 1,600 tonnes LEC (Leg Encircling Crane) in order for the Aeolus to be able to install larger wind turbines. Work is to begin in September 2017 and the upgraded vessel will be operational in Spring 2018.

The Aeolus was previously active in offshore wind projects Gemini, Luchterduinen and in the Irish Sea and will take on new projects after her upgrade like offshore windfarm Borssele 3 & 4 in the Netherlands and Norther in Belgium.

[] – Van Oord signs contract for modification offshore installation vessel Aeolus
[Google Maps] – Damen Shiprepair Schiedam

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