The Peralta GCEE Wind Farm, Peralta I – II will install the lastest new techonolgy, the ENERCON E-92 Wind Turbine by the German manufactured ENERCON.
The E-92 series include ENERCON’s most advanced technology. Its rotor has a diameter of 92 meters and a nominal power of 2.3 MW; it is specially designed for sites with moderate wind. Its redesigned rotor blade profile achieves maximum energy yields while ensuring optimal load distribution and reducing the rotor blade’s overall weight. Compared to the results of the established E-82 series, the E-92 can achieve up to 15 percent more yield.
Up to 2,35 MW
Gearless, variable speed, single blade adjustment
Upwind rotor with active pitch control
No. of blades:
GRP (epoxy resin); Built-in lightning protection
Variable, 5 – 16 rpm
ENERCON single blade pitch system, one independent pitch system per rotor blade with allocated emergency supply
Double-row tapered / cylindrical roller bearings
ENERCON direct-drive annular generator
3 independent pitch control systems with emergency power supply, rotor brake, rotor lock
Active via adjustment gears, load-dependent damping
Cut-out wind speed:
28 – 34 m/s (with ENERCON storm control)
Wind turbine’s main components
Drive systems in conventional wind turbines operate with a geared system in order to increase the rotation speed of the turbine to produce power.
ENERCON wind turbines are based on a gearless drive system: fewer rotating components reduce mechanical stress while at the same time increasing the equipment’s technical service life. Conventional geared systems with a large number of bearing points, require greater maintenance and more lubricant. The ENERCON drive system only requires two slow-moving roller bearings.
ENERCON’s annular generator is a low-speed synchronous generator with no direct grid coupling. It has a stationary part, the “stator” and a mobile part the “rotor”. The stationary part has copper windings. The copper winding is exclusively done manually to ensure perfect performance. The rotor contains the poles which stimulate the magnetic field in the windings of the stator. This allows the generator to supply a flow of power with no friction and minimum mechanical wear.
The blade of the ENERCON wind turbines is based on a new modified shape that reduces noise emissions and increases power output by more than 15% over the previous design.
The ENERCON blades are manufactured with a vacuum infusion process using the so-called sandwich technique. Glass fibre mats placed in a mould are vacuum-impregnated with resin by means of a pump and a hose system.
In order to efficiently protect the rotor blade surface against weather elements such as wind, water, UV radiation, the rotor blade’s protective finish is composed of gel coat, filler, edge protection and top coat using only solvent-free two-component polyurethane compounds.
The foundation is the link between the tower and the subsoil, and bears all static and dynamic loads of the wind turbine. For the construction of each wind farm, ENERCON carefully examines the land where its wind turbines will be installed. This way, it determines the most adequate foundation for each location depending on the subsoil. ENERCON foundations are always circular to distribute the load exerted by the force of the wind proportionally and at the same time to avoid tilting. The circular foundation also reduces the amount of reinforcement and concrete required in its construction.
Currently, either steel or concrete wind turbines are available in the wind sector. Due to its technical characteristics, the E-92 is mounted on a concrete tower that is designed to allow greater height than the steel tower; it is more silent because it does not echo and it has less swaying motion, making it more stable. ENERCON concrete towers are not manufactured as monoliths, but rather in segments of different sizes. Those with larger diameter are divided into two or three sections for better transportation. ENERCON uses a special epoxy resin to join the different segments. Once assembled, the sections are linked to each other by tensioning the tendons which run from tip to base.
ENERCON will construct the concrete towers for the Peralta GCEE Wind Farm, Peralta I – II, on the site.