Checkout this video from PatentYogi to catch a glimpse of how Google will control Project Loon balloons’ altitudes.
Gurgaon, Haryana -- (SBWIRE) -- 03/13/2015 -- Project Loon from Google is a global network of high-altitude balloons to connect people in rural and remote areas who have no Internet access at all. By moving with the wind, the balloons can be arranged to form large communications network.
Here is our video that demonstrates how these shows will look like - https://www.youtube.com/watch?v=jjSV_UAaO4I
Google patented various ways they will control altitudes of the balloons, with the patent Number - US 8,967,533 (Balloon power sources with a buoyancy trade-off).
First patented method - To decrease the altitude, gas in the envelope is pumped out into a high-pressure storage chamber. The gas is moved into the envelope to increase the altitude.
Second patented method - Balloon runs a fuel cell in reverse to generate hydrogen gas, which is moved into the envelope to increase buoyancy and altitude. The hydrogen is pumped back to produce power via the chemical reaction of hydrogen and oxygen to produce water.
Third patented method - A portion of the envelope is painted black. To increase altitude, rotating the balloon is rotated such that the black portion faces the sun, black absorbs heat which warms up the gas inside the envelope..
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