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Old July 15th 11, 10:12 AM posted to sci.space.policy
William Mook[_2_]
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Posts: 3,840
Default Dust down those orbital power plans

Sunlight on the Earth ranges from 900 hours per year to 2,100 hours
per year, depending on location while energy density ranges from 850 W/
m2 to 1,000 W/m2.

Sunlight in space is available for 8,766 hours per year and is at a
density of 1,370 W/m2.


Low Light: 0.765 MJ/m2/yr
High Light: 2.100 MJ/m2/yr
Space: 12.009 MJ/m2/yr

So, if space based systems are less than 6x the cost of the best
terrestrial systems, they're worth doing.

Conventional solar collectors cost $1 per peak watt. In a location
that has 1,400 hours of sunlight per year that's $0.08 per kWh.. when
the sun is shining. When the sun is not shining, there you have a
problem. You also have a problem when oil runs out. That's because
the manufacturing processes will become far more costly, as well as
transport and installation, and you won't have this price any more.

Now, using a concentrator to focus light to a small spot, reduces the
cost per peak watt, and the cost of energy when the sun is shining.
This lets you add systems that store energy when the sun isn't
shining, for example by producing hydrogen gas from water, and this
with concentrators, can make solar energy useful for all things,
including oil, which is what you need when the oil runs out - a source
of oil products at less cost than conventional oil - to support your
supply chain.

http://www.youtube.com/watch?v=dbWNnVsBhOg

The cost of water filled lenses operating at 5,000x concentration with
$1 per square cm 45% efficient multi-junction cells that cost $0.03
per peak watt. Far less than any conventional solar panel. This
produces hydrogen at $100 per metric ton from sunlight and water -
equivalent to $4 per barrel.

The cost of a gas stabilized concentrator operating at 20,000x
concentration at GEO with $1 per square cm 65% efficient multi-
junction solar pumped laser that costs $0.007 per peak watt- when
beaming IR laser energy back to the terrestrial systems increasing
their output 16x - reducing costs to $25 per metric ton - or $1 per
barrel.

The cost of a radiator stabilized multi-junction power satellite
operating at 1,600x ambient levels at 3.5 million from the Sun,
beaming energy back to Earth orbiting reformer, operating with the
same solar pumped laser system - beaming energy directly to end users
at a cost of $1 per metric ton or $0.05 per barrel.

Using laser propulsion and laser beams in space radically reduces the
cost of space access, which reduces the cost of solar power, which
reduces the cost of laser beams in space, which reduces the cost of
space access - in what some have called a 'Mook Curve' of decline,
similar to a Moore Curve in electronics.

Terrestrial
http://www.scribd.com/doc/20024019/W...to-Mok-FINAL-1

Space Based
http://www.scribd.com/doc/35439593/S...-Satellite-GEO

Launcher
http://www.scribd.com/doc/45631474/S...rived-Launcher

Advanced Systems
http://www.youtube.com/watch?v=QvE-bkc0Uxo
http://www.youtube.com/watch?v=iWiXDu64c0g
http://www.youtube.com/watch?v=XxV2FCUESh0
http://www.youtube.com/watch?v=nzG4PEureFg
http://www.youtube.com/watch?v=mzXwctPXT4c
http://www.youtube.com/watch?v=LAdj6vpYppA
http://www.youtube.com/watch?v=2QAUkt2VPHI