Electricity in wind power is generated by the wind turning a propeller, consisting of specially designed blades around a rotor. The rotor then transfers the spinning motion to a generator which creates electricity. Wind turbines are positioned in locations where wind flow is strong and consistent, with very little topographic obstructions to wind flow. Hence, onshore wind farms are usually installed on exposed land where wind is consistently strong. There are very few obstructions to wind flow at sea, so offshore wind farms are able to leverage much higher wind speeds. To position and secure each turbine in place on the sea floor is a complex undertaking.
Foundations for offshore wind farms use a variety of designs based on factors such as water depth and sea bed conditions. The majority of projects use monopiles as their foundation. A monopile is a single large diameter pile, which is inserted and grouted into the rock on the seabed. Monopiles are generally used in water depths of 35 meters or less. Installations in depths between 35 and 120 metres also use a variety of designs, most commonly jacket structures. Jacket structures for offshore wind utilise the same steel frame design as jackets used in many oil and gas platforms. Any installations in waters deeper than 120 metres use a floating structure design.
Edgen Murray’s decades of experience in offshore construction translates well to providing structural steel for new and evolving power generation applications like offshore wind farms. We have a range of plate, sections, welded and seamless tubulars in standard and offshore grades. We also go beyond product supply by offering point-to-point delivery, which includes cutting to length, welding and end profiling of steel tubulars, delivered to the fabricator ready for assembly.