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OFFSHORE WIND FARMS & RENEWABLES


AqualisBraemar to Oversee Construction of Newbuild Wind Turbine Installation Duo


OuYang Offshore Co., Ltd. has awarded AqualisBraemar the construction supervision contract for two newbuild self-elevating wind turbine installation vessels to be constructed at Chinese shipyard Dayang Offshore Equipment Co., Ltd.


AqualisBraemar’s on-site team at Jiangsu-based Dayang Offshore Equipment will monitor and supervise the construction of the two wind turbine installation vessels – OuYang 003 and OuYang 004 – to ensure that all work is carried out in accordance with the contract specifications plus flag and class requirements.


The project will be managed from


AqualisBraemar's office in Shanghai, China, which previously held the same role for OuYang 001 and OuYang 002. AqualisBraemar has not disclosed the value of the new contract.


“As these are the third and fourth wind turbine installation vessels we are cooperating with OuYang Offshore and Dayang Offshore Equipment on, our joint objective is to deliver a safe and even more cost-effective construction process for the two new vessels,” adds Yongfei Peng.


Both units are identical, 75.6 metres in length, 40 metres in beam, 7 metres in depth, 4 hydraulic pin legs self-elevating wind turbine installation vessels. Both units are self-propelled, with an operational water depth of up to 50 metres and


accommodation for up to 68 persons. Both units are equipped with one 600MT leg fitted crane around one of stern legs, with a lifting height of 140 metres from sea level. With the spacious main deck, both units are capable of the lifting installation of 10MW wind turbines in China.


First Subsea Celebrates Successful Commissioning of WindFloat Atlantic Offshore Wind Farm


The WindFloat Altantic Offshore Wind Farm located 20km off the coast of Viana do Castelo in Portugal is now fully operational. All three floating foundations were connected to the mooring line using First Subsea Platform Mooring Connectors (PMC).


WindFloat Atlantic is owned by the Windplus consortium led by EDP Renováveis with partners Energie SA, Repsol SA and Principle Power Inc. The floating platforms measure


30m in height and 50m between columns and accommodate the world’s largest wind turbines installed on a floating structure of 8.4MW.


Prior to the tow out the anchors and mooring lines can be pre-laid by a standard AHV and taken off the critical path of the project. The PMC is connected to the platform in the yard and held in place using the pull-in messenger line. The tow out of the platform is performed by standard towing craft. The PMC and pull in line are lowered and used to connect the pre-laid mooring lines. The mooring line is pulled up directly from the seabed, tensioned and connected in one operation. The whole installation process has been done to optimise both offshore resources and offshore time, thus reducing the overall cost associated with mooring activities.


42 www.sosmagazine.biz August 2020


“The PMC offers many unique features, such as the ability to connect and provide a storm safe functionality instantly and the ability to be disconnected easily should the platform need to return to port, to name just a couple,” said Greg Campbell-Smith, Sales Director, First Subsea.


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