White paper: Possible to dramatically increase power density in wind farms with SeaTwirl's vertical axis turbines

Due to faster wake recovery, it is possible to place SeaTwirl's vertical axis wind turbines (VAWT) closer together in a wind farm and get more power generation from the same area, simulations in a new white paper show.

SeaTwirl commissioned the white paper from Dr Pablo Ouro, a researcher at the University of Manchester. It investigated different spacing configurations in windfarms with 25 10 MW turbines placed in five rows. Due to reduced wake interference, VAWT outperformed horizontal axis wind turbines (HAWT) in all scenarios. The paper concluded: "VA[W]T wakes recover faster than HA[W]T wakes due to the different mixing with the atmospheric flows which in turn leads to more efficient arrays."

"It is due to the higher turbulence intensity. A simple way to visualise this is to think of a stream of water. If you put a propeller in the water, it will create a long twirl behind it. But if you stir the water with a spoon, the turbulence it creates will subside much faster", says Jonas Boström, CTO of SeaTwirl.

The most dramatic difference was with slender VAWT, i.e. turbines that are taller but have a smaller diameter, that reached a power density of almost 19 MW/km2 compared with 2.65 MW/km2 for a typical HAWT configuration. Changing the aspect ratio, the relative width and height, while keeping the area swept by the turbine constant is unique for VAWTs and strengthens SeaTwirl in discussions with developers.

"There are discussions in many countries to increase the power density demands for coming offshore wind farms to avoid building in eco conservation areas. This white paper shows that SeaTwirl can be placed in very dense wind farms without losing much efficiency due to wake effects. It adds to our already strong value proposition for developers", says Peter Laurits, CEO of SeaTwirl.

For more information, please contact:

Peter Laurits, CEO
Phone: +46 70 148 01 98
E-mail: [email protected]

Dan Friberg, Board chairman
Phone: +46 70 788 75 44
E-mail: [email protected]

About SeaTwirl
SeaTwirl AB (publ) is a Swedish energy tech company in wind power with the vision to become global leader in floating offshore wind farms. SeaTwirl's unique floating vertical-axis wind turbine is simple and robust with few moving parts. This suits the conditions at sea and minimizes the need for maintenance, which leads to less downtime and operating hours. These are key requirements for reducing the costs associated with the production of energy. The company's first prototype was installed in the sea in 2015. Development is now taking place on the next full-scale unit of 1 MW installed turbine output. The company has been listed on Nasdaq First North Growth Market since 2016. Read more at: https://seatwirl.com

The company's Certified Adviser is Mangold Fondkommission AB that can be reached at: +46 8 5030 1550, [email protected].

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Kallelse till extra bolagsstämma i SeaTwirl AB (PUBL)

Aktieägarna i SeaTwirl AB (publ), org.nr 556890-1135, ("Bolaget") kallas härmed till extra bolagsstämma torsdagen den 22 december 2022. Styrelsen har beslutat att stämman ska genomföras via förhandsröstning, så kallad poströstning enligt 22 § lagen (2022:121) om tillfälliga undantag för att underlätta genomförande av bolags- och föreningsstämmor och de regler som trätt i kraft den 1 mars 2022. Någon stämma med möjlighet att närvara personligen eller genom ombud kommer därmed inte att genomföras. Information om de av bolagsstämman fattade besluten offentliggörs den 22 december 2022, så snart utfallet av poströstningen är slutligt sammanställt.

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The nomination committee proposes that Dr Mike Anderson be elected as new member of the board of directors in SeaTwirl

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SeaTwirl beslutar om företrädesemission av units om cirka 64,5 MSEK

Styrelsen i SeaTwirl AB (publ) ("SeaTwirl" eller "Bolaget") har idag, med stöd av bemyndigande från årsstämman den 17 maj 2022, beslutat om en företrädesemission av units bestående av aktier och teckningsoptioner med företrädesrätt för befintliga aktieägare om initialt cirka 64,5 MSEK ("Företrädesemissionen"). Företrädesemissionen omfattas till cirka 60,2 procent av teckningsförbindelser och garantiåtaganden.

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SeaTwirl har vunnit en utlysning om stöd för "Större pilot- och demonstrationsprojekt för energi- och klimatomställning" från Energimyndigheten. Stödet uppgår till 50,4 MSEK.

SeaTwirl gets 50.4 MSEK financing from the Swedish Energy Agency

SeaTwirl has been awarded a grant for "Larger pilot and demonstration projects for energy and climate change transition" from the Swedish Energy Agency. The grant amounts to 50.4 MSEK.

SeaTwirl utser Johan Sandberg till ny VD

SeaTwirl har utsett Johan Sandberg, veteran inom den havsbaserad vindkraftsindustrin, till ny VD. Han tillträder senast den 1 mars 2023.

SeaTwirl appoints Johan Sandberg as new CEO

SeaTwirl has appointed offshore wind industry veteran Johan Sandberg as its new CEO. He will start no later than March 1, 2023.

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SeaTwirl och Tokyo Universitet har inlett ett samarbete där en forskargrupp under ledning av Associate Professor Shinichiro Hirabayashi på Department of Ocean Technology, Policy and Environment undersöker hur SeaTwirls teknik kan anpassas till japanska förhållanden.

SeaTwirl in cooperation with the University of Tokyo

SeaTwirl and the University of Tokyo have started a cooperation where the research group led by Associate Professor Shinichiro Hirabayashi at the Department of Ocean Technology, Policy and Environment, are looking to adapt SeaTwirls technology to Japanese conditions.

White paper: Possible to dramatically increase power density in wind farms with SeaTwirl's vertical axis turbines

Due to faster wake recovery, it is possible to place SeaTwirl's vertical axis wind turbines (VAWT) closer together in a wind farm and get more power generation from the same area, simulations in a new white paper show.

SeaTwirl signs LOI for manufacturing and installation of S2x in Norway

The wind power company SeaTwirl has signed a letter of intent with Westcon Yards for the manufacture and installation of the 1 MW S2x on site in Norway. The agreement marks an important step forward in the S2x project.

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