The project began in January 2011, by the desire to develop a space-saving resource of clean and renewable energy.
The idea of designing a generator, suitable to the demands that emerge from the international market was born. At that moment the first 3,5 KW engines appeared.
At the Politecnico University of Milan we continue to perform a series of tests in the wind tunnel for simulations and performance optimisation. The tests gave excellent results.
This is how the Ecolibri 3,5 and 9,9 Kw vertical hybrid micro wind generators were born.
The key feature of the micro wind turbine ECOLIBRI’ is to have an environmental impact which is completely irrelevant, even in the context of a mini wind turbine camp consisting of more turbines.
The shape, unique in its kind, makes the turbines minimally invasive both for their small size and for the chance to be painted with colours that reflect the surrounding environment.
The noise of the wind blades ECOLIBRI is undetectable (<20Db) even in the presence of strong winds, as the blades cannot rotate at a higher speed than the wind itself and consequently do not cause any kind of hiss and noise.
Let us know more about your needs so we can study and offer the best custom stand-alone energy solutions.
The hybrid micro wind turbines with vertical axis Ecolibri 3,5 and 9,9 kW are studied for a “stand alone” use where the power grid is not available. The obtained energy will be stored in batteries and will at your disposal 24 hours a day.
Here’s just a schematic example of a complex solution.
It goes as follows:
On site you can immediately notice:
All these factors must be carefully evaluated as they affect the final cost of the installation and its pay-back time.
In order to understand if a site can host a wind installation, the wind data have to be retrieved from:
If that is not possible, Ecolibrì offers the software based screening.
Choosing the right station is essential. It must have:
The anemometric station must be positioned where the turbine will be installed. At this point, it is essential to check the site in order to avoid possible wind turbulences caused by the morphology of the terrain.
Once the wind data are collected, it is possible to determine the expected turbine production with specific software. Attention: wind intensity and distribution may vary from year to year.
Rooftop installations are more complex than ground ones. During the project evaluation you need to consider the following factors:
Resonance frequency happens when an object excites the frequency of its own structure (pole, building). Every structure has its frequency. If frequencies overlap, they can increase their energy by 100 times, and in some cases that can break the structure.
In case of a rooftop installation it is advisable to use a structure that distributes the forces evenly (lateral pression, torsion, and weight) because most of the times the building frequency is unknown.
The structure should be stiff in order to push the resonance point beyond its breaking point. The resonance can be avoided by slowing the rotation down. Ecolibrì provides every installation with a triaxis sensor configured on certain tolerance thresholds that slow down the turbine rotation when the limit is exceeded. Ecolibrì’s priority is to guarantee the installation safety.
The calculations must be done in accordance with:
The turbine manufacturer has to provide the civil engineer with all the turbine data (area, weight, rotation speed, pole structural calculation). Alongside with these data, a valid geological report has to be attached. Ecolibrì standard plinths are calculated according to the IEC 61400-2 “Wind Turbines – Part 2: Design requirements for small wind turbines” international norm.
Turbine positioning is very important in order to guarantee maximum efficiency in energy production. If the turbines face the wind the distance between them must be at least three times the turbine diameter (measured from wing to wing not pole to pole). If turbines are installed one behind each other, the minimum distance required is ca. 10 times the turbine height (rotor). If the turbine position does not follow a straight line, the distance can be reduced (5 times the height).