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Originally posted by spikey
reply to post by Miccey
A cheaper still option would be something similar to enviro-project's convection tower.
A large hollow metal tower, painted black to absorb the heat of the sun and in the upper half, place turbines (large fans) in series at periodic intervals, and then convection will do the rest.
Hot air rises, so heat from the sun will cause the air inside the tubular metal tower to rise up, pulling in cooler air from the bottom of the tower at ground level which in turns get's heated and rises. The rushing air, will turn the turbine blades to produce electricity.
I'm actually planning to build one of these myself...but on a much smaller scale. I've been saving all of our metal baby milk cans, and must have about 60 - 80 by now (each is about 10" long), and i have also been saving any aluminium drinks cans we use, and have a similar number. I plan to place the smaller drinks cans inside the larger diameter (5") baby food cans, pack with steel wool, and paint the outside jet black BBQ paint. I am either going to place multiple small 5" 12V fans at funnel points along the way (to metal cones lip to lip, and have the air rushing up inside the drinks cans to turn them.
On a hot summers day, it should generate a fair amount.
Originally posted by Miccey
But WHOO can produce the CHEAPEST energy?
And YES im talking money here..
Originally posted by Nutzoid
ok, how about you buy an exercise bike, set up a generator driven by the wheel, that generator could charge some efficient batteries that could be used to cut down on the electricity bought from the electric company. kids ant to watch tv or surf the net? 1 hour on the bike will give them 10- 12 hours of power.
Solar & wind seem to be the best at the moment, but with the cost of replacing your Arrays every 20 years it is currently cost prohibitive.