Siemens Gamesa has added a new turbine optimised for low wind sites to its 4MW platform.
The SG 4.7-155 in the 4.X platform has a 155 metre rotor and a nominal power rating of 4.7MW.
A prototype of the new model is expected to be ready by mid-2021, with the start of production planned for the end of 2021.
The SG 4.7-155 is equipped with OptimaFlex technology, enabling it to operate between 4MW and 5MW depending on site conditions.
The platform will be enhanced by one of the two rotors developed for the Siemens Gamesa 5.X platform, said Siemens Gamesa.
This approach, which was also implemented on the SG 3.4-145 launched in July, optimises the company’s R&D investment and industrial capital expenditure, reduces the development cycle, and improves the time-to-market of new products, stated the manufacturer.
Siemens Gamesa onshore CEO Lars Bondo Krogsgaard said: “The new model will make us much more competitive in the low wind market segment, complementing our SG 5.8-170 to offer our customers broader options depending on their project characteristics and needs.
“This type of modular approach using the best of our onshore innovation will help us lower the cost of energy for them and offer the best solutions for the energy transition.”
The model will use a 76-meter blade made of fiberglass reinforced with pultrude carbon, integrating “innovative aerodynamics” to guarantee the best balance between high energy production and reduced noise emission levels.
The annual energy production in average low wind conditions is 5% higher than that of the SG 5.0-145, Siemens Gamesa said.
The turbine also has a low noise output of 105 decibels, making it suitable for countries with strict noise restrictions such as France.
In addition to these functionalities, the lifetime of the new turbine has been increased to 25 years from 20 years at IEC-Class 3 sites.