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Wednesday, December 03, 2008

Cheap Solar Reflectors

Yet another interesting article in the November 17th issues of Forbes. This one on an innovative idea to use ballons as solar collectors. The company behind this technology is Cool Earth Solar.

The idea seems very cool, and if they hit their target cost per watt then it could be a solar power break through. There isn't a mention of the cost of the balloon system. One concern from the description is the complexity of the balloons, with water cooling and a system to modulate internal pressure as needed. An interesting question is would less complex balloons that are as efficient at the square cm of solar cell level, be more efficient at the price per watt level? One would expect they started there, if not someone will hopefully following in their footsteps.

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