NRG Patagonia finished the installation
of its first equipment NRG 1.500 NRG Pataonia finished the installation of its first equipment NRG 1.500, located in the area of El Tordillo. This task was successful, and according to the projections done. These jobs demanded an exact logistic coordination so as to do the manoeuvres in heights over 70 metres, using cranes especially contracted for them. In this way, NRG 1500 is a reality and it will start the testing period proximately, in the frame of revisions included by Vientos de la Patagonia Program I.
Updated: may, 2010
With a job demanding more than 50’000 hours-man, and adding the activity of folding more than 130 tons of tin to manufacture the tower, which reaches a height of 70metres, the mounting was done during the last weeks, in jobs which demanded the maximum effort to guarantee operative and safety conditions, and excluding days with the typical wind of Patagonia.
Located on a Basement of concrete composed by more than 300 cubic metres, the Jobs were done in sequences which included tower mounting in three sections, installed on the which is anchored to the concrete structure. Later, after fixing the 108 of 50 millimeters which compose each one of the flanges, summing up hundreds of units of fixing to afford the structure, the hoisting of the nacelle o generator as it was, on the extreme of it the hub o nucleus was assembled and to it the blades, shaping the “nose” of the windmill.
The blades were built in fiber glass, with a length of 32 meters each, which means a diameter of of 64 meters, and the generation trains located in the back extreme to the axis which turns with the movement of the blades. These have slue angles which vary to face the regional winds, with measurement systems and automated control that continually regulates the attack angle of the three blades to be able to take the maximum from the wind energy and at the same time, protect the windmill from extreme winds when it is necessary to brake it till its total stopping.
At the same time, it is necessary to say that the matrix of the nacelle and hub framework , and components of the cover were designed and built by technicians of NRG Patagonia, to be later elaborated so as to model different components which let the manufacture by cast of unique parts of big dimensions. The tower was completely folded, sandblasted and painted in the workshops of the regional company, so as the total mounting of the different components of the equipment, which included an intensive work of engineers and local operators during the installation of the control systems and electrical connection, and the practical elevator that takes personnel and different loads or tools to the height of 68 meters , the top of the aero generator, to perform the jobs at the maximum height of NRG 1500. These were the first steps of a project which its main target is intensify, in consecutive steps , the participation of regional companies in the manufacturing of new equipments.
During the mounting it was needed 100 high capacity crane working hours, for this job it was contracted a special equipment with a maximum capacity of 600 tons, so as to understand the dimension of the task itself and the job requirements that the installation of this kind of equipment needs. It is worthy remembering that out of the 120 tons of the total weight of the tower it is necessary to add other 80 tons due to the nacelle or generation train and the core with the blades added.
NRG 1500 is an aero generator of constant speed with blade path control, with transmission of power by a multiplier box and a final adjustment of turning regimen by a hydraulic clutch. This is located at the entrance of the asynchronic generator which delivers electrical power.
The aero generator has been calculated and verified not only in design, but also in manufacturing of components and total assembly under the IEC specifications , for Class 1+. It is the first aero generator developed in Argentina specifically for wind conditions with an annual speed average of 11 meters per second.
It counts with a full control system that operates it just to obtain the best efficiency of the delivered power, under the most strict security requirements. During the mounting a crew of 25 workers was needed, and it was also used to develop night hours tasks due to the weather conditions which didn´t allow the normal development of the job during daytime.