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Infidel | 10-30-2006 04:58 AM
Wind powered home water heater (Effin yay! About time) CORVALLIS, Ore. (AP) - Although Oregon State University professor Alan Wallace died last spring, his vision for a wind-powered water heating system is being realized by students who considered him a mentor and pioneer in sustainable energy. "It's nice that even after he passed, his work is continued," said Paul Vigansky, a senior majoring in electrical engineering and co-team leader on the water heater project. "I'm hoping to bring this technology out into the world, to allow his legacy to live on," he said. Vigansky and fellow team leader Jacques Chiron worked with three other OSU students with an interest in power systems, in addition to faculty advisers, to develop a prototype of Wallace's idea for their senior project. This year, a new group of students is continuing where they left off. Vigansky and Shamus Gamache, another member of the original team, hope their design eventually can be patented and used for residential and commercial heating, particularly in developing countries. On a recent afternoon Gamache and Vigansky presented their model to Ron Adams, dean of the College of Engineering, and David Vant Hof, sustainability policy adviser to Gov. Ted Kulongoski. Their water heater is fairly simple, the students said. The prototype is about three-quarters the size of a telephone booth, topped with a Savonius wind turbine made from a 35-gallon steel drum. To heat the water tank of a conventional home, the turbine would need to be about three times larger, Gamache and Vigansky said. They estimated the cost at about $2,000. http://www.salem-news.com/gphotos/1158434586.jpg Unlike conventional methods of heating water, which require electricity or natural gas, this technology is completely sustainable. The turbine is connected to one end of a vertical shaft. At the other end are 22 powerful magnets. When wind hits the turbine, the shaft spins, rotating the magnets. This change in magnetic field creates energy. A copper plate below the magnets acts as a conductor. As the plate warms, water from a storage tank is pumped through copper coils attached to the plate, and heats. The turbine also could be placed in a stream, and the water current would cause the shaft to rotate, the students said. Once the water is hot, the turbine could be used to generate electricity, or the hot water could provide passive heating such as radiant heat for a home. The device hasn't been tested in the field yet, but during lab tests it was able to heat water to 190 degrees Fahrenheit. The primary concern, Vigansky said, is not letting the magnets overheat. Once the magnetic array passes 175 degrees, the magnetic field is lost. To protect against this, the team installed a safeguard that monitors the magnets' temperature. Once they reach about 120 degrees, the copper plate automatically moves away from the magnets. The group still needs to determine exactly how much wind is needed to make the turbine spin, and how long it would take for the energy savings to make up for the cost of the water heater. Both Vigansky and Gamache have been approached by homeowners, primarily in rural and coastal areas, volunteering to try the project. Due to liability and legality issues, that wasn't possible, but the interest was encouraging. "It's a great project. It was a lot of fun to work on. I can see it working in Oregon and Alaska and all over the world," Gamache said. another article http://www.salem-news.com/articles/s...heat_91606.php

RiverRat | 10-30-2006 10:27 AM
Re: Wind powered home water heater (Effin yay! About time) :cool1: Thanks for the post Infidel... I am quite familiar with another method which uses plain wood or steel paddles to do exactly the same thing. Hook them up to the shaft,place in a barrel of water and let the wind do the rest... Back in the early part of the 20th century livestock tanks were heated with large paddles just churning the water to raise the temperature and prevent freezing during the cold months. The best comparison is an electric mixer churning water in a bowl... Repeated churning causes a heat rise due to friction of the water molecules.... In windy areas like Oklahoma,Texas and Kansas the water would get so hot in the winter months they had to keep a steady stream of fresh cold water running into the tank to replace the water lost by steam !! The livestock would not drink hot water,so they had to either lock the mill or keep the water flowing to cool the holding tank down to a reasonable temperature. Whether this is an urban legend or a fact up for grabs...sounds possible,but never tried it. Lot's of old technology no longer in use...the magnet thing is a different twist on the subject...very interesting idea.

GoldWampum | 10-30-2006 10:34 AM
Re: Wind powered home water heater (Effin yay! About time) Looks like an old Savonious type vertical turbine. Not real efficient but it works. Nice start.

tulsamal | 11-01-2006 03:33 AM
Re: Wind powered home water heater (Effin yay! About time) But why would this be more desirable than just using a passive solar collector for hot water? I guess if you had wind but no steady sunshine. Not usually a problem in Oklahoma. We usually have both. Gregg

Unclad Lad | 11-02-2006 12:31 AM
Re: Wind powered home water heater (Effin yay! About time) In Alaska in the winter, it would work where a passive collector wouldn't. Also, passive collectors rely on a lot of piping; this sounds a lot more self-contained.

DrillAndFill | 11-02-2006 01:22 AM
Re: Wind powered home water heater (Effin yay! About time) Quote:
Originally Posted by Infidel (Post 400719) Unlike conventional methods of heating water, which require electricity or natural gas, this technology is completely sustainable.
:haha: :haha: Steel drums are sustainable? How many trees do you have to burn to produce the heat to make a lump of steel? Quite a few. Quote:
The turbine is connected to one end of a vertical shaft. At the other end are 22 powerful magnets.
Powerful magnets. Those things which you just find on the ground, or which you can produce from herbs grown in lovingly in a small organic garden. No need for massive coal-fired foundries here. Phhhbttt! This is an improvement. But don't think for a moment that you're going to avoid fossil inputs in the manufacture of these babies. This may not be as bad as solar panels, which consume roughly as much energy in the manufacture as they produce during their service life. Kudos to these kids for thinking, but avoid the term "sustainable" here.

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