Engineering Support to the Offshore Renewable Energy Industry

Engineering Support to the Offshore Renewable Energy Industry

Mooring & Foundation Solutions and Installation Engineering for the Offshore Renewable Energy Industry

Axis Energy Projects' long experience in providing mooring and foundation solutions to the offshore floating production and subsea industry, enables us to provide economical and well thought out mooring and foundation solutions for the offshore renewable energy sector, and in particular Floating Offshore Wind (FOW).

The FOW sector is forecast to deliver 12GW of offshore wind by 2030.

The Axis Energy Projects team has experience in the design and analysis of foundations in a variety of seabed soils for diverse applications including:

  • Drag embedment anchors
  • Suction anchors
  • Gravity base anchors
  • Driven piled foundations - hammer or vibropile
  • Drilled and grouted foundations

We are able to provide fully engineered solutions - from the determination of the design loads (by sophisticated computer simulation) through analysis and detailed design of the mooring/foundations to provision of engineered installation procedures and installation supervision.

Not only does our expertise in installation engineering ensure that the mooring/foundation solutions identified are technically competent, but, by tailoring the system to suit given installation vessel capabilities and any other constraints there may be, we provide commercially sound solutions that help maximise our customers' return on their investment.

Accelerating Floating Offshore Wind

With the support of the UK Government and the Offshore Renewable Energy Catapult, Axis is developing its Tension Leg Buoy (TLBTM) for the Floating Offshore Wind (FOW) sector.   

The Axis TLBTM represents a life-cycle approach to offshore wind, covering turbine dynamics, installation, operation monitoring & re-powering. Its potential starts where fixed foundations end, at about 50m water depth, and extends into depths of hundreds of metres.

High-level environmental benefits of the Axis system include its relatively small seabed footprint, no need for piling or jack-up vessels, and a simple decommissioning process. Financial modelling of an entire offshore windfarm using the Axis TLBTM system has determined a LCOE 30% less than other FOW designs and comparable with offshore fixed installations. Future developments on design life, mass production, and material developments, will drive this further down.

Strathclyde University, which has provided Axis with technical support, has said: by comparing with other [FOW] concepts the proposed TLBTM system demonstrates better stability performance, flexibility in installation and transportation, reduced requirement for water depth, lowered tether/tendon tension fluctuation with free flooded central column and possibility of integrating a wave energy device to form a multi-energy complementary system.

The key characteristics of the AXIS TLB are:

  • Stable, robust cost-competitive system
  • Simple off-site pre-cast fabrication
  • Wind turbine assembled at the quay
  • Modular for easy low cost deployment, recovery, repowering and decommissioning
  • Reduced dependency on specialist vessels
  • O&M benefits
  • Future-proofed through scalable standardised design
  • Wind turbine agnostic
  • Oscillating Water Column (wave energy) option