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HSM offshore hires Heinen & Hopman for Borkum Riffgrund 2 substation

By: Tom Russell 27/02/2017 Heinen & Hopman

General Substations Windfarms

Dutch manufacturer HSM offshore has subcontracted Heinen & Hopman to supply the dehumidification system, the ventilation system, the heating & cooling system as well as the HVAC control systems for the Borkum Riffgrund 2 offshore substation.

Heinen & Hopman said that robustness is one of the key requirements of the contract and it will use high quality materials will be used to avoid corrosion and guarantee the 25 year lifetime of the platform. Only stainless steel ducting and piping will be used, as well as self-contained units with air cooled condenser coils made of titanium.

Offshore substations require a controlled indoor climate to maintain the temperature, relative humidity and air quality within the design limits in order to ensure optimum operation of installed electrical and electronic equipment.

By providing ventilation, heating, cooling and moisture control, acceptable air quality and temperature is achieved in all weather conditions. Indoor rooms are required to be kept at an 50 Pa overpressure in order to avoid infiltration and ingress of salt-particles, dust and saltwater aerosols.

HSM offshore was awarded the contract for the high voltage AC transformer platform in April 2016. This includes the delivery of the 2500 tonne topside, 1700 tonne jacket as well as associated piles. The platform will collect the electrical energy from the offshore wind farm turbines, transform it to a higher voltage level and deliver the power to shore. Completion is scheduled for May 2018.

Borkum Riffgrund 2 is located 54km off the coast of Lower Saxony, next to another of DONG's wind farms Borkum Riffgrund 1. The project will feature 56 MHI Vestas V164-8.0 MW turbines, each with a 8MW capacity, covering an area of 36km². Installation works are scheduled to commence in the first half of 2018 and it is expected to be fully commissioned by the end of 2019. Once operational it is expected to meet the energy demands of 460,000 German households.

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HSM offshore hires Heinen & Hopman for Borkum Riffgrund 2 substation

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