Solution

SATH strenghts

CONCRETE

Reduced construction and maintenance costs.

LOW DRAFT

Feasible in shallow and deep waters.

SELF-STABLE

Easily transportable.

COST COMPETITIVE

Compared to bottom-fixed Offshore Wind Turbines.

Platform concept


SATH is a prestressed-concrete floating platform consisting of two cylindrical and horizontal hulls with conical ends linked to each other through bar-frame structures.

The hulls are shell structures with circular or ovoidal cross section. They are internally stiffened and divided into compartments by cross bulkheads. The tower support is fixed to the floating elements through another auxiliary structure.

In order to increase the natural periods in pitch and roll oscillations, the floating elements are attached to some flat and horizontal plates arranged submerged in the lower area of the platform.
These elements are made of solid slabs lightened with a ribbed structure.

Finally, the platform is moored with a Single Point Mooring (SPM) system that allows SATH to rotate around as a weathervane, helping yaw control system to maintain the rotor plane facing the wind.

SPM and platform ship shape allows also lower environmental loads in the mooring lines.




Single Point Mooring (SPM) system


Finally, the platform is moored with a Single Point Mooring (SPM) system that allows SATH to rotate around as a weathervane, helping yaw control system to maintain the rotor plane facing the wind.

SPM and platform ship shape allows also lower environmental loads in the mooring lines.

These elements are made of solid slabs lightened with a ribbed structure.



SATH construction



SATH construction is based in an entirely onshorised concept. All platform and turbine equipment is installed on port facilities.

Construction is carried out in a precast yard employing common means in the naval field, such as a rail transfer system and a shiplift to easily launch the platform once the turbine is completely installed.

Finally, a standard tugboat is able to transport SATH (totally seaworthy) to its final location where mooring lines and inter array cables will be waiting for the Plug & Play connection.
This onshorised construction process reduces offshore operations to the minimum.