Posts Tagged ‘Wind’
News Agency shows a 100% Solar Powered House
http://www.ecopoweredhome.com
To find out how these people managed to eliminate their power bill visit:
http://www.ecopoweredhome.com
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Duration : 0:1:35
History And Uses Of Wind Power As An Energy Alternative / Documentary Video
Wind As An Energy Alternative / Educational video. Department of Energy. Produce by the Solar Energy Research Institute. Wind: An Energy Alternative. This program looks at the history and uses of wind power, used for centuries by humans to move boats, pump water and grind grain including discussions on efficiency, problems in the urban environment, experimental systems and windmill use across the United States. Producer: Department of Energy. Creative Commons license: Public Domain.
Surprisingly good short film about wind energy. What makes it valuable is the interviews with Marcellus Jacobs (a builder of wind turbines in the 1930s) and Ted Finch (whose efforts got the concept of net metering legally acceptable in the US). It’s interesting to note that one of the people listed in the credits, Paul Gipe, is still active in the industry. He’s now a leading author on the subject. His website is http://www.wind-works.org
Duration : 0:12:17
A Homemade Wind Turbine (Free Energy)
I DID NOT BUILD THIS OR MAKE THE VIDEO, just posting it bcz I encourage everyone to invest in their own. This is a test run of the guys newly made wind turbine.
If these links do not work, just google “Build your own Wind Generator”..
http://www.thekevdog.com/projects/wind_generator/
http://www.instructables.com/id/Ted-Baer_s-Bicycle-Wheel-Windmill/
http://www.forcefieldmagnets.com/catalog/index.php?cPath=22_30
Output depends entirely on wind speed, windy days will yeild more power.
smaller units 5′-10′ average 50-500 watts
larger units 11′-20′ produce on average between 500 watts-up
(professionally 21′ and larger up to 7.5 Kw and up)
Power is defined as the rate at which work is done or energy is consumed. The formula for average power is acquired by dividing work by the time needed to perform work: P = W/t. Power has units of newton-meters per second or joules per second or watts
A kilowatt-hour is the electrical energy consumed in one hour at the constant rate of one kilowatt. The average household in the United States uses about 8, 900 kilowatt-hours of electricity each year.
Here are some math formulas to consider…(source: http://www.awea.org/faq/windpower.html)
Because air has mass and it moves to form wind, it has kinetic energy. You may remember from science class that:
kinetic energy (joules) = 0.5 x m x V2
where:
m = mass (kg) (1 kg = 2.2 pounds)
V = velocity (meters/second) (meter = 3.281 feet = 39.37 inches)
Usually, we’re more interested in power (which changes moment to moment) than energy. Since energy = power x time and density is a more convenient way to express the mass of flowing air, the kinetic energy equation can be converted into a flow equation:
Power in the area swept by the wind turbine rotor:
P = 0.5 x rho x A x V3
where:
P = power in watts (746 watts = 1 hp) (1, 000 watts = 1 kilowatt)
rho = air density (about 1.225 kg/m3 at sea level, less higher up)
A = rotor swept area, exposed to the wind (m2)
V = wind speed in meters/sec (20 mph = 9 m/s) (mph/2.24 = m/s)
This yields the power in a free flowing stream of wind. Of course, it is impossible to extract all the power from the wind because some flow must be maintained through the rotor (otherwise a brick wall would be a 100% efficient wind power extractor). So, we need to include some additional terms to get a practical equation for a wind turbine.
Wind Turbine Power:
P = 0.5 x rho x A x Cp x V3 x Ng x Nb
where:
P = power in watts (746 watts = 1 hp) (1, 000 watts = 1 kilowatt)
rho = air density (about 1.225 kg/m3 at sea level, less higher up)
A = rotor swept area, exposed to the wind (m2)
Cp = Coefficient of performance (.59 {Betz limit} is the maximum thoretically possible, .35 for a good design)
V = wind speed in meters/sec (20 mph = 9 m/s)
Ng = generator efficiency (50% for car alternator, 80% or possibly more for a permanent magnet generator or grid-connected induction generator)
Nb = gearbox/bearings efficiency (depends, could be as high as 95% if good)
If there is any single equation that the beginning wind enthusiast should memorize, this is it.
Here Are some links…
www.blueenergy.org
www.homemade-wind-turbines.co.uk
www.otherpower.com/otherpowerfront.shtml
Other Energy resource websites..
http://peswiki.com/energy/Main_Page
http://www.absak.com/
Duration : 0:1:45
New Wind Power – The Wind Belt Invention
Shawn Frayne invented an inexpensive non turbine wind generator called the wind belt. I have no specs other than what you see on the video. I imagine it’s use on the roof of an electric car but obviously it can be used anywhere there is wind. The bennefit is that it is very inexpensive to build as opposed to a standard turbine wind generator.
The fan simulates the wind which moves the belt which moves the magnets through the coils to make electricity to power the clock and LEDs. I don’t know how much the output voltage is.
Help Stop The Suppression Of Inventions
http://www.panacea-bocaf.org/newsletter/newsletter.htm
Duration : 0:2:4
The Combined Power Plant – 100% from renewable energy
http://www.unendlich-viel-energie.de
The secure and constant provision of power anywhere and at anytime by renewable energies is now made possible thanks to the Combined Power Plant. The Combined Power Plant links and controls 36 wind, solar, biomass and hydropower installations spread throughout Germany. It is just as reliable and powerful as a conventional large-scale power station.
The Combined Renewable Energy Power Plant shows how, through joint control of small and decentralised plants, it is possible to provide reliable electricity in accordance with needs. The Combined Power Plant optimally combines the advantages of various renewable energy sources. Wind turbines and solar modules help generate electricity in accordance with how much wind and sun is available. Biogas and hydropower are used to make up the difference: they are converted into electricity as needed in order to balance out short-term fluctuations, or are temporarily stored. Technically, there is nothing preventing us from 100 per cent provision with renewables.
The Combined Power Plant is an initiative of the companies Enercon GmbH, Schmack Biogas AG and SolarWorld AG, and is supported by many partners from the renewable energy sector.
Duration : 0:7:26
MWTT Maglev Wind Turbine
http://www.maglevwindturbine.com
Demo CGI for proposed 2GW Magnetic Leviatated wind Turbine.
*Efficient Frictionless Power Generation with less maintenance, compared to HAWT.
No oil change or replacement of the bearings, gears.
Since, MAGLEV does NOT require such.
** Current bearing technology has forced wind turbine designers into horizontal spindle three bladed wind turbines. In this design the huge blades are connected to a spindle in the center. The bearings that support the spindle and control the pitch of the blades (which can be hundreds of feet long) see huge pitch-moment loading, some of which is manifest as torque energy that is focused through the center spindle. The target speed for the spindle is 18 or 20 rpm and the bearings holding the spindle are mounted in a huge casting which also contains a large gearbox stepping the speed up to 1800 to 2000 RPMs which allows for the proper surface speed relationship between the coils and magnets. It is necessary to invert or condition the current, which is expensive. This gearbox is full of many large bearings, gears and castings; for a 2 MW turbine the gearbox can easily weigh 30 tons. This gearbox needs to be mounted on the top of a pole more than 150 feet in the air and be able to support the turbine blades under full-force wind conditions.
***MAGLEV Power Generation, the pitch moment ratio is closer to 1-to-1 then the 100-to-1 as with a horizontal spindle design.
Duration : 0:1:41
Home Made Wind Generator still running
It has been in service for a few months now and still working great. Thanks to all those who have great web sites that provide info. You know who you are.
Duration : 0:0:21
Afghanistan’s struggle to tap wind energy – 21 Nov 08
It was in the Panjshir Valley that both the Soviets and the Taliban were repeatedly repulsed by Shah Massoud.
Now, as Al Jazeera’s David Chater reports, the lair of the Lion of Panjshir is the site of the country’s first ever wind farm.
Duration : 0:2:54
Kitegen Stem – High Altitute Wind Energy
The Kitegen Stem is an italian developed power plant that is rated at 3MW. A 27MW kitegen Windpark (9 stem units) is under construction since Dez 09.
1MW installed will be about 4 times cheaper than conventional windturbines with a capacity factor from 50-85% depending on location an operating high (800-10.000m).
The Stem could be operated offshore or on a ship.
Heres much more information on the project (with comments by the Italien inventors).
http://europe.theoildrum.com/node/5538
http://europe.theoildrum.com/node/5554
www.kitegen.com
Duration : 0:4:38
Making Wind Power A Reality
Juan de Bedout, a scientist at General Electric’s Global Research Center discusses wind power at a recent energy briefing at the Technology Center.
Duration : 0:3:57