17 July 2009

First space-to-earth solar power station targeted for Oct. 2010

From: http://asianenergy.blogspot.com/2009/07/first-space-to-earth-solar-power.html
...Last Monday, I interviewed Sir Charles Shults III of Xenotech Research which has several projects under way: 1) moving near the New Mexico space port to expedite development of an orbital solar power project for deployment in Oct. 2010; 2) ramping up for manufacturing of an affordable, modular 500W Solar Pod for purchase within six months; 3) designing a residential wind turbine expected to be 1/3 the cost of others.

Space-Based Solar

Because of his work with what apparently will be the first functioning space-based solar array for transmitting power to earth, Sir Charles was invited to be part of the recent groundbreaking for Spaceport America on June 19 in New Mexico, near Truth or Consequences -- yes, that's the name of a town. Shults is
relocating Xenotech Research there so they'll be conveniently located for their work in conjunction with the deployment of what apparently will be the world's first space-based solar collector and transmission project, to be carried out by the Space Island Group. Space Island Group (SIG) is the leader in the commercialization of space and plans to design, build and operate commercial space transportation systems and destinations that are dedicated to commerce, research, space solar power, satellite repair, manufacturing and tourism. (Ref.)

The solar collector components will be piggy-backed to space along with the space tourism that will be carried out. Sir Charles told me he has recently been negotiating with Gene Meyers and Terry Martin of SIG. They are looking to him to supply some technologies for their orbital solar power project, having received permission to orbit a solar power satellite demonstrator and will soon be building receiving stations on the ground for the proof of principle. Sir Charles' involvement includes advising on methods for moving craft from lower to higher orbits using less rocket fuel; energy generation technology; and technology for power-receiving antennas on the ground.

They plan for the first proof of concept solar station to be deployed in a low earth orbit of 300 miles in October of 2010, generating around 12-13 kilowatts. The power will be transmitted via precisely-tuned microwave frequencies, and will require "no fly zones" above the receiver area on earth.

By 2012, they intend to deploy a 1 gigawatt (akin to a nuclear power plant output) geosynchronous space solar station up around 22,300 miles, which will be constantly available on earth except during lunar eclipses of the solar station. The intensity of solar energy in space above the Earth's atmosphere is 1360 watts per square meter, compared to a maximum of 960 Watts/m2, depending on angle through the earth's atmosphere. (Ref.) Taking into consideration the day-night cycles and cloud cover, an earth-based solar system, even in an ideal location, will only generate about 20% as much power as what the same sized space-based array could generate.

At first, the receiving stations will be fixed-location utilities, but Sir Charles said that in the future, it's conceivable that one could have a mobile device with a subscription to receive power, very similar to a cell phone account. For this reason, the military has been especially interested in the technology, as it would resolve fuel supply-line issues.

The transmission of power apparently can be done very efficiently as well. Sir Charles said that according to new work being done by Mitsubishi in Japan for cell phone power, wireless point-to-point transmission on earth presently exceeds the efficiency of copper wire-based transmission.

The space solar initiative has been in development since 1970, when the original proposal was made.

The space tourism initiative has been given momentum recently by Burt Rutan who made the first successful non-government-sponsored space flight (actually three). His technology was purchased by Sir Richard Branson's Virgin Galactic, who then hired Burt to design a larger transport system which will be the basis of the first commercial space flights. (Ref.)

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