- Morocco will host the tallest wind tower at a hub height of 144 metres.
- Spanish EPC Nabrawind self-erecting steel Nabralift design, which also features a lightweight piled-in foundation, will support a 3.6MW Siemens Gamesa turbine.
- The Self-Erection System (SES) allows the installation of a full WTG (tower, nacelle, rotor) without using large-size cranes regardless of the final hub-height.
The tower allows the installation of a full WTG (tower, nacelle, rotor) without using large-size cranes regardless of the final hub-height thanks to the Self-erecting System (SES). The SES is conceived to install the lowermost sections of the tower at the last part of the assembly process. For this purpose, the SES is able to hoist the WTG in intermediate stages and install tower sections under it.
The other innovative aspect of Nabralifit is its piled foundation. Unlike the gravitational foundation, which for a tower of this type would require 500m3 of concrete and 60 tons of steel, Nabralift’s piled foundation requires only 80m3 of concrete and 10 tons of steel. This makes this option 60% cheaper than the traditional one.
Construction of the tower will use 80m3 of concrete and 10 tonnes of steel, as compared to the 500m3 of concrete and 60 tonnes of steel used by ‘gravitational’ designs. Works will begin this summer, with the remainder of the installation taking place “at the end of this year and the beginning of the next.
With this sale, the Spanish company takes part of the current trend in the wind market, which is moving towards the installation of higher and more powerful wind turbines in the range of 3.5MW-5.5MW.
The project developers, location and capacity are not specified in the Nubrawind press release.
Author: Bryan Groenendaal