Sunday, September 20, 2009
getting energy out of the wind.
getting energy out of the wind.
I was thinking of how birds get energy out of a wind. There really cannot be anyway to do so in a constant wind, other than saving energy while flying a land distance downwind.
To get energy out one needs wind shear. Then one can see how one might go round in a loop and get more energy out than put in.Though in doing so they are likely to drift 'downwind' at an average speed. one could think of it relative to the average with wind going equally in two opposite directions. A windmill made up of the wings of the bird captured at regular time intervals can clearly get energy out.
Indeed this image shows how one might get energy out of a tethered single aerofoil. Run it round in a circle perpendicular to the wind, and you get a 'waterwheel' type system with the tether as a crankshaft, to a generator on the ground. hey-presto.
now all you have to do is avoid planes and tangles.
cheers
martinW
I was thinking of how birds get energy out of a wind. There really cannot be anyway to do so in a constant wind, other than saving energy while flying a land distance downwind.
To get energy out one needs wind shear. Then one can see how one might go round in a loop and get more energy out than put in.Though in doing so they are likely to drift 'downwind' at an average speed. one could think of it relative to the average with wind going equally in two opposite directions. A windmill made up of the wings of the bird captured at regular time intervals can clearly get energy out.
Indeed this image shows how one might get energy out of a tethered single aerofoil. Run it round in a circle perpendicular to the wind, and you get a 'waterwheel' type system with the tether as a crankshaft, to a generator on the ground. hey-presto.
now all you have to do is avoid planes and tangles.
cheers
martinW
