There is high demand for wind turbines to produce more energy at lower costs. It is assumed that taller towers mean more generating capacity. Because of this, OEMs are developing turbines that are efficient and reliable, and with proper maintenance last more than 20 years.
For example, consider Nordex SE and its multi-megawatt Generation Delta wind turbine. This fourth generation N117/3000 and N100/3300 combine Nordex’s technology with enhancements that include larger rotors, increased nominal output, and automatic lubrication of pitch-system bearings. This allows an increase in production and reduces operating costs over previous models.
The Generation Delta N117/3000 has an installed capacity of 3 MW particularly in medium wind speeds (IEC2) on a 120m steel tower. The turbine also boasts a 20% increase in nominal output over its previous model. The rotor diameter is 17m larger accounting for a 37% increase in rotor sweep and 10% higher numbers during full-load hours, says the company.
The N100/3300, intended for high wind speeds (IEC1), has a nameplate capacity of 3.3 MW, resulting in about a 30%
increase in nominal output over its previous design. The turbine also has an increased rotor diameter of 10m producing a 23% increase in swept area. The N100/3300 is intended for a 100m steel-tube tower.
Generation Delta turbines sport an anti-icing system for cold climates. The device reduces ice formation by heating the rotor blades thereby ensuring maximum availability in low-temperature regions.
Generation Delta allows swift and safe servicing which lowers operating costs. A spinner completely encapsulates the rotor hub ensuring quick and safe access to this part of the turbine. The nacelle is a particularly safe and spacious workplace and features extended escape and rescue routes. Automatic lubrication of the pitch bearing raceways does away with the need for manual attention to this matter, thus further reducing and shortening on-site maintenance requirements. WPE
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