Renewable energy: mini and micro wind affordable even for private

Not only photovoltaics. Here is how to invest in renewable energy and in a convenient manner different from usual.

Through the Fifth Energy Bill running out, who wants to invest in renewable energy is looking for alternatives than usual photovoltaics. A good opportunity comes from the mini and micro-wind, that despite the cuts to tariffs still offer a good balance between cost and performance.

The Ministerial Decree of 6 July 2012 contains the provisions on incentives for renewable energy is not solar.

The amount of funding in 2013 was set at € 291 per MWh for power plants between 1 and 20 kW, with a decrease of 3% compared with the rate applied previously, and 268 euro per MWh for power plants between 20 and 200 kW, with a cut of 11 percent. For the larger sizes, both onshore and offshore, the rate decreases further. The duration of the incentives was fixed at 20 years for plants on land and 25 years for those off the Italian coast.

The micro-wind and mini-wind are the most affordable solution for small private investors, both in terms of cost of installation and maintenance, and because for installations below 60 kW will not fire the requirement for entry special, but it is enough for a simplified procedure for enabling (Pas), which reduces the time needed for the bureaucratic burden. The building is also free for all microimplants turbines with a height lower than 1.5 meters and a diameter not more than 1 meter: their realization is considered routine maintenance is not subject to the discipline of the denunciation of logins. Important then the choice between blades vertical or horizontal axis. In the first case the system is able to exploit even the wind generated by the turbulence producing minimal noise, but the cost, in the same installed power, is on average higher compared to installations that would fall within the second category.

The net cost of a wind turbine can vary from about 70 thousand to 100 thousand euro for an installed power of 20 kW, the 200-about 300 thousand Euros for a plant of 50-60 kW. The annual maintenance costs account for a further 3-5% approximately. All this without considering the value of the land on which to install the system: unlike for photovoltaic systems, it is the surface area available to affect the performance of the system but rather its average exposure to the wind. It is therefore essential to carry out an analysis anemometer to assess the profitability of the site. The larger systems must also comply with the distance from the other buildings to prevent the spread of noise pollution, but the parameters may vary according to the region of reference and installed power.

The consulting firm Energy Hunters, founded as a research group inside the 'University of Bologna, has estimated the potential yield of a plant mini-wind 50 kW installed on a ground where the average wind speed is equal to 5.5 meters per second for a specific power aerodynamics average of 150W per square meter and 1,400 equivalent hours of the plant. Faced with an installation cost of approximately € 150 thousand, the return on investment is equal to 5.11%, with a payback period of 11 years and 8 months.

 

20/02/2013

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Translated via software

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Source:

Italian version of CercaGeometra.it

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