63 results found displaying 40-42
    
bob12
 Canada
Microphone Generator Printer Friendly Version
I know it's not a new invention and most of us know how it works to act as transducer between air pressure (ie sound waves) and current. But the idea behind it is always to capture intelligible sound.
The idea that I propose is based on the same scheme as microphone but for the purpose of generating electricity. We can think of huge or array of microphones installed near noisy or windy places to perform like windmill but at very low cost.
Reward: mark of gratitude 

There are 14 replies to this idea



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47°

    
TarjeBargheer
 Denmark
Watermills in rain pipes Printer Friendly Version
I moved to the city a couple of years ago, and have noticed how clean the roofs always are. No leafs get up there. Further, from every roof there runs a pipe all the way along the edges of the roof, and to the ground in order to make the rain that ends on the roof go to the ground without pouring down on the windows.
My idea is simply to put a little mill inside the pipes that go from the roof to the ground, the mill should run a simple generator in order to produce power. - Since the roofs are always clean in the city, the problem of dirt accumulating in the mill is not an issue.
It wouldn't be much of an extra cost to produce such pipes, since both the generator and the mill are easily made out of few raw-materials (plastic for the mill, and some copper and magnets for the generator).
There is quite a lot of square meters of roof in a city, and if these pipes were installed as a replacement of the old ones when the roof should be renewed anyway, it would propably accumlulate a neat amount of energy (although not nearly as much as a dam!).
Reward: A sample of the product? 

There are 28 replies to this idea

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59°

    
midoh
 Ireland
Undersea electricity transmission cable between Africa & EU Printer Friendly Version
Many Europen nations have a surplus of electricity generating capacity. A cable laid across the Straits of Gibralter would enable electricity to be transmitted & sold to African nations which were connected up to a common electricity grid. The funding for such a cable (and the transmission grid) could come from a European sponsored 'Marshall Aid' type plan for Africa. This would further economic development in Africa and ease immigration pressures on Europe simultaneously. A classic win-win situation for all!
Reward: Prosperity in Africa, stability in Europe. 

There are 8 replies to this idea



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29°

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