Kucne vetrenjace

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Engineers have developed the guts of a small-scale windmill that could one day help power individual homes.

Most efforts at harnessing wind for electricity focus on large, commercial wind farms.

Personal windmills could be useful in rural settings where space is ample and electricity sometimes costly. But before they could ever effectively supplement regular power supplies, more efficient systems are needed.

Attempts so far haven't returned enough energy to offset the costs, researchers say. Windmills that operate at lower wind speeds are needed.

The new prototype is headed in that direction.

"We have developed a simple, reliable, controller for small scale wind energy generators that is cheaper than competing technologies," says Andy Knight, a professor of electrical and computer engineering at the University of Alberta.

In the lab, Knight's team put together a computer control and a DC motor to simulate what would happen outside, tweaking the setup to work in a light breeze. They say a real system could be built based on their results using simple and inexpensive components.

"Our research focus was the development of the simple control scheme to expand the operating range of the generator," Knight told LiveScience.

Current small-scale wind energy generators cost about $2,400 (U.S.), Knight and his colleagues determined. On an average day of wind, one can produce 5.2 kilowatt-hours per day. According to Natural Resources Canada, the average household consumes between 34 and 67 kilowatt-hours per day.

Most small-scale generators require wind speeds of at least 11 mph (18 kilometers per hour) to generate any power, the scientists say. The new device would work with winds of just 6 mph (10 kph).

http://www.livescience.com/technology/050719_windmill.html

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vlado, zagrebao si veliku oblast.

pošto ja to već dugo dugo pratim, za tebe i druge kojima je interesantno, dajem nekoliko linkova:

http://www.bergey.com/ - jedan od proizvodjača elektrana na vetar

http://www.fieldlines.com - najjači forum za obnovljive, čiste izvore energije

http://www.windpower.org/en/core.htm - danska asocijacija za istraživanje, proizvodnju i održavanje energije dobijane iz vetra

http://www.eoltec.com/ - francuska firma,jedna od poznatijih za izradu manjih sistema

ako treba još nešto, razvićemo temu.

može i putem privatnih poruka, mada je možda bolje ovako.

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Kada je vec o tome rec. Pomogao sam prijatelju i slozio mu knjigu o vetrenjacama. Vetrenjacu je sam napravio, radi kod njega na vikendici i potpuno je opisan postupak i celokupan proracun.

Knjiga je celokupno njegovo iskustvo.

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Pa eto, za mene jedna veoma zanimljiva tema a ono ugasen forum. Zivim u istocnoj Srbiji i godinama razmisljam o tome da bih zimi mogla da se grejem na struju iz sopstvene vetrenjace, posto najvecu hladnocu u kuci nam unosi kosava koja ulazi i kroz najsitnije rupice. Mozda necu doprineti temi ali bih volela da se ovaj forum obnovi ili da mi bar neko javi gde mogu procitati zanimljivosti o vetrenjacama, na primer kako se prave, sta je potrebno, i koliko je potrebno ulaganja u jednu vetrenjacu.