The Germany is the country in Europe that ago the widest use than eolica energy. Currently we are on nearly 17 an equal energetic ability GigaWatt (2005) and the 61 forecasts are of GigaWatt for 2029 that would more cover of 29% of the energy requirement of type electrical worker of the Germany. It is necessary to remember that the rinnovabili sources are generally intermittent and that a national electrical system of it supports a modest quota around 9-19%. The Aeolic is the rinnovabile source currently more mature and more economic with cost for Kilowatt of the system around the 1500 dollars and in continuous lessening. The powers of the single Aeolic systems are consisting, are arrived to 5 MW but the type of system depends from the ventosità. In a Danish site I have found the cost for kwh of a turbine from 600 KW, in the table that follows bringing back the medium wind in the site where it finds the aggregator and the production cost of the electric power for kwh.

The example is for to 584 kW wind upsets of it with project lifetime of 20 years; investment equal to 0.6Million USD including installation; operation & maintenance cost ~7000 USD/year; 5% p.a real installments of interest; annual it upsets of it energy output taken from power density calculator using to Rayleigh wind distribution (sharpe factor = 2). The wind is second considered the meterological habits and that is to 10 m from the ground. These data would have to be dawned to 2003. They are sufficient of the little ones contributions be them in order to render the electric current production convenient through this type of energy. One centers them thermoelectric would have to produce to electric power to the cost of *cents/Kwh, the parity with the Aeolic is had for average speeds of the equal wind to 5-6 meters to the second. I have then read that the aereogeneratori more little ones work with wind 3 m/s beginning from, I have not found but the cost of such production of electric power.

From the economic point of view the energy of upsets some is intermittent and the managers buy who it practice a decrease of the 40-49%, for this exist a series of economic compensations like the certificates greens. With 2000 hours of operation equivalent to full power (medium wind), 7.5 GW (14% of the thermoelectric one) would produce 14 annually TWh. This corresponds to 4.5% of the requirements national electrical worker. Since the electricity consumption represent approximately 27% of the consumption total of energy (given 2001), would have a saving on the total of energy them were consumed annually in equal Italy to 1,5%. The limit of the 9-18% of the thermoelectric product from the intermittent sources has not prevented to the Germany to preview to catch up 25% of own requirements electrical worker in 2028 through the Aeolic. The Germany has lately deliberated to arrive to the 12.5% within 2011. In effects various methods exist under consideration in order to accumulate energy and to supply it when the wind not is.

The Bersani decree estimates the accumulated power maximum of the Aeolic systems to 6.5-8.5 GW that would avoid problems when couplings a source intermittent electrical worker to the national net. Esteem that the Aeolic does not have to exceed the 13-24% of the thermoelectric one that it piles to 50 GW, is 5-10 GW. (In total the data of 2001 are installed 78 GW for the requirements Italian electrical workers second). The production anniversary of 15 TWh of rinnovabile electricity would avoid the atmospheric release of approximately 11 million tons of CO2, that it would represent a reduction of 2.4% of the Italian total emissions. The possibility exists as an example to fill up with a pump river basins of high water to heights in order then to unload them on a hydroelectric turbine producing electricity. Practically ours center them hydroelectric could make from battery. The batteries exist currently Redoxes to the vanadium bromide that are in short two liquids contained in enormous tank. A liquid contains the positive energy while the other the negative energy. They still have energy density lowland and pars to 50Wh/Kg, in order to accumulate the equal energy to 1Twh are necessary enormous amounts of liquid (20 billions of liters that is 20 meters x 1 km x 1Km) but the technology is interesting also because it has efficiencies high (79%).

The conversions exist chemistries from electricity to methanol and methanol to electricity where but the efficiencies are many lowlands. The batteries to fuel exist that use hydrogen as energetic carrier (virtual energy) whose total efficiency is not elevated. An other system in order to obviate to the problem of the intermittenza of the eolica energy is that one to create a transnational net that connects the Aeolic systems. Nearly always the perturbations hit a limited and relatively small zone of the planet for which the great net of eoliche shovels it will have some zones with much wind, others with medium wind and others without wind. For a statistical effect the production electrical worker will be nearly always near the medium value for the season and discosterà a lot are with lowland probability. With systems of I accumulate of these types could be extended the use of the Aeolic and other intermittent sources a lot beyond 19% of the thermoelectric one, therefore beyond the 10 GW but this problem it regards the future.

Italy has the equal longest coast to approximately 7000 Km, if the tourism with the Aeolic were wanted to be bartered is convinced would gain an enormous amount of energy. For the maps on the speed of the wind in Italy it has been taken care some ricercadisistema, the maps are relative to the heights of the shovels and not to the 10 meters from me brought back in the table. I have read that China is studying an off-shore series of Aeolic systems (along its coast), is spoken about 750 installabili powers of Gwh that with ours twenty would give to 1500 Twh/year. As reference in Italy Twh is produced approximately 320/year for the consumption electrical worker. One centers them to coal has however costs for Kwh that are the half of a eolica turbine therefore are not still an economic transaction for who are not interested to the clean air. To part the precision of my data I feel myself to assert that the electric power production through the Aeolic is nearly convenient without incentives, the full convenience will have hardly the oil goes up a little of price as it is making in these months. Enegia rendered regarding consumed energy (E.R.O.E.I.) This is a rough draft (work in progress) which drafted from Francisco Pasqualin and mail on the site energoclub (formed sheet of calculation .xls OpenOffice.org/MS Excel). They come brought back energetic yields (E.R.O.E.I.) of several used sources in order to produce to electric power and the number of years (Energy Pay-back) for having the equilibrium between spold energy and supplied energy.

Data are not successful to obtain some but I know that the Italian coasts, in particular of the south Italy, are many ventose and in proximity of coasts and spiagge it is economic to install Aeolic systems for via of the lowland depth of I found them. Currently it is maintained to us to many kilometri from the coast but to a sure price of the oil there will be little people that have money in order to go in beach and is thinkable to take advantage of the coasts for the electric power from the wind. Modernization 24 down 2006: The last searches in Aeolic field estimate in 20% an acceptable limit of eolica energy to pour in net with minimums overcharges for the equipments in order to compensate the intermittenza of the eolica source. If, as many begin to think, the oil then continues its scaling of the prices to oltranza it will be the case to pass to the eolica source accepting also some blackout which had to wind lack. In such case us it can be pushed very beyond 20%. As I said the off-shore energetic ability to the Aeolic I do not know to estimate it numerically I estimate but it huge if respect for the distances from the coast were not had. Perhaps transforming all the wind in electric power with the participation of hydroelectric systems (20% of the consumed electric power) we could less make of the oil/gas/coal/nuclear at least in the field electrical worker.

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Filed under: Alternative Energy • Energy Crisis • Green Energy • Other • Wind Energy

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