A concrete replacement floating foundation developed for deep-water wind farms far off the coast could last up to 100 years. Designed for durability and scalability, it would be capable of supporting up to three consecutive generations of wind-turbine generators of 7 MW or higher.
Current concrete technology is not robust enough for the long-term exposure experienced in an ocean wind farm, and steel technologies require complicated shoreside construction and at-sea installation procedures with multiple large crane barges as we informed you earlier. The Marine Advanced Composite Concrete (MACC™) material and newly developed assembly/erection ocean-going deck barge (OGDB) has solved both of these issues. The breakthroughs to achieve this are three-fold:
The first is changing the ordinary Portland cement (OPC) binder in the concrete. The second is replacing the coated steel rebar with a material (basalt) that will achieve a non-metallic reinforcing structural frame. The third is forming, ballasting, and launching the foundation’s floating spar, and then installing the wind-turbine generator (WTG), in a completely novel way. The combination of these advances will increase the longevity of the system while simultaneously reducing construction, installation, and maintenance costs.
Andy Filak, a principal with AMF Concepts.
John Reeves, PE PMP, a naval architect with Elliott Bay Design Group.
This publication is courtesy of Andy Filak.