At Green Products, we have come across a product from Cool Earth: Solar Balloons. Cool Earth was created with the mandate of producing electricity using solar power, specifically solar cells. Solar power is not a new concept, but how the sunlight is collected and concentrated is truly unique.
The cost to install and maintain the current flat-panel solar cell design is prohibiting its large scale adoption. The glass cover is easily damaged by windstorms, hailstorms or vandalism. When this happens, it leaves the solar array exposed to the elements where they can be damaged. The unique balloon design by Cool Earth eliminates many of these shortcomings.
The system’s design is centered on the concept of an air-filled Mylar balloon like a children’s birthday balloon. One half of the balloon is a highly reflective mirror-like surface and the other half is transparent. The solar cell is located at the center of the clear side allowing sunlight to pass by, be collected and focused back onto the solar cell.
This unique design can concentrate the sunlight so well, it produces 300 to 400 times more power per square inch of solar cells than traditional flat-panel solar systems. By regulating the air pressure inside the balloon, they can focus the concentrated sunlight directly on the photocell. The air regulating system is designed to maintain the proper balloon size as the outside air temperature increases or decreases.
The orb has a simple circular metal frame that is used to hold the Mylar in the proper shape. An arm extends from the ring to the top center of the orb. This holds the solar cells that produce the electricity at the proper focal point. The shape of the balloon and consequently the focal point is altered by adjusting the internal air pressure.
Like all solar designs, the system will not be used as a base power plant because the energy collected during the day cannot be economically stored for nighttime operations. On the other hand, the system will be an ideal “peaker” power plant to be used during the hot summer months when energy demands are high.
Another of the aspects we find most interesting at Green Products is how the balloons are linked together with wire, wood and sheet metal. We are also impressed at the lack of limitations that are imposed when the systems are installed and how they eliminate the destructive heat that destroys most solar cells. Soon this system will be installed and go online. Check it out.
Michael
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