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With the world’s ever-increasing demand of power being more than its supply, it is about time that we take concrete steps to save power. Apart from being conscious about the usage of power and water at home, one can employ pollution-free and cost-effective power solutions at our homes. Solar power solutions and wind power solutions are the two of the most efficient solutions that can replace the conventional power solutions employed at our homes.

These solutions can help you combat power outages, reduce your electricity bills, and also help the environment.

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I have to build a HOMEMADE windmill for an English project and I have no idea how to approach this project. Any ideas?

Easiest way is to use a car alternator.

I love the idea of offshore windmills BUT….

Sharks depend on a receptors that are tuned to sense electic fields to hunt prey.

Hopefully the cables are properly insulated and will not cause stray electric fields. I doubt that a shark would mind too much anyway. they will just hunt somewhere else.

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No. Your washing machine AC motor does not act as a generator. You can however use a car alternator and batteries for storage. Connect this to an inverter for AC power. I helped a friend build one to provide power in a large shed/ workshop.

1. The power P delivered by a windmill whose blades sweep in a circle of diameter D by a wind of speed v is proportional to the square of the diameter and the cube of the wind speed. This dependence on diameter and wind speed is expected in the case of 100%-efficient energy transfer from the wind to the mill. Show that for 100%-efficient energy transfer the power of the windmill is given by P=(pi/8)*ρ*D^2v^3 .
(Hint: First calculate the kinetic energy of a cylinder of air of density ρ moving with speed v, then determine the rate at which this energy is transferred to the windmill.)

The answer is pretty much embedded in the question and the hint.
KE(cyl) = mv^2/2 = ρ*Vol*v^2/2 = ρ*πD^2/4*L*v^2/2
Power = dKE(cyl)/dt = ρ*dVol/dt*v^2/2 = ρ*πD^2/4*v*v^2/2 = π/8*ρ*D^2*v^3.

just moved to hill with good wind ..looking for one of those windmills(that produces power ) you put up in your backyard and hook it in to power company grid …anyone know of any good sites to find one?

So you got about 5 million to invest , thats what one cost that will supply you and feed the grid also……….Nuf Said

just moved to hill with good wind ..looking for one of those windmills(that produces power ) you put up in your backyard and hook it in to power company grid …anyone know of any good sites to find one?

So you got about 5 million to invest , thats what one cost that will supply you and feed the grid also……….Nuf Said

I would like to either buy one or a ready to essemble kit . How big of a windmill would I need to provide enough electricity for a 7 room house with full basement. I want to use it to provide all the power including heat in the winter.

It’s going to cost more than a few bucks. Here’s one site that has a nice overview of what you’ll need and what it might cost.

http://www.dovetailsolar.com/priwind.htm

You’ll also have to plan on a way of storing energy for use when the wind isn’t blowing.

How many household (light,fan,TV etc) can a 2kw windmill power?

First you must sure the Voltage is stable, it’s mean not depend on wind, or you must have stabilizer, or the windmill unit has own stabilizer system.(the voltage not going up and down).
Then calculate how many household for 2 kw = 2000 watt power supply, i.e:
1.Refrigerator 500 watt.
2.Washing machine 500 watt.
3.Air Condition 1 Hp ~ 750 watt.
4.The rest 250 watt for lighting (it can be 50 watt x 5 = 250 watt)
This only example, depend on what you have.
But, if you can’t guaranty the stability & continuity, I sugest :
1. Don’t use household with motor (i.e Refrigerator, Air Condition, Washing Machine, Water Pump etc). Heater, Toaster, Fan is OK.
2.For lighting, use Incandesce lamp, not Neon Lamp (TL = Tube Lamp), Mercury Lamp.
For 60 W Incandesce Lamp 30 pcs is OK.

I am doing research for a landscape architecture firm about how they can pump water from the ocean to their resort using wind power. One of my ideas which I have heard much about is attaching an archimedes screw to a windmill or some sort…but I can’t find any pictures or diagrams of one! can somebody help please?

en.wikipedia.org/wiki/Archimedes’_screw

http://physics.kenyon.edu/EarlyApparatus/Fluids/Archimedes_Screw/Archimedes_Screw.html

or else simply go to google image search and search for ‘archimedes screw windmill’