Vigyan Ashram February 08, 2008 04:51AM |
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Re: Vigyan Ashram August 23, 2010 01:18PM |
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Quote
mike bushroe
Shawn Frayne
Here is a free patent idea to improve the windbelt.
The belt, like many wind generators, works best at some ideal angle to the wind. Steering it around to match prevailing winds might make up for the slip joints needed to allow the power generating coils to rotate freely in any direction, or perhaps not.
However, as wind speeds increase, the ideal tension of the belt needs to increase, and then decrease again when the wind speed drops. This is particularly tough in gusty conditions, But if you add a pair of opposed wind vanes to the top of the windbelt, they will act just like the fronds of palm trees in high winds. The wind vanes are geared such that the tension of the belt keeps them spread apart, so that when the wind pushes them together, they pull harder on one end of the belt, increasing the tension.
When the wind is gentle, 4-10mph, the tension of the windbelt keeps the vanes approximately 90 degrees apart from each other, and the entire windbelt rotates to have the midpoint between the vanes point away from the wind. With the wind vanes far apart, the belt is at minimum tension and oscillates in light breezes. When the wind picks up, the pressure against the wind vanes pushes them closer and closer together, and the gearing causes the belt tension to climb as the vanes come closer together. Then when the wind slacks off, the tension of the belt is greater than the force pressing the vanes together, and the vanes move apart and the tension on the belt declines. Even in gusty conditions, the windbelt dynamically changes to match the instantaneous wind speed.
Thus the belt can be optimized dynamically without external power, or tapping into the small amount of power it generates, or requiring continuous external (often human) intervention. And the self adjusting mechanism is still simple enough for third world countries to build and maintain.
Mike Bushroe
mbushroe@gmail.com
reprap self replicating rapid prototypers
Re: Vigyan Ashram September 09, 2010 06:20PM |
Registered: 14 years ago Posts: 387 |