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Reaping powerful ideas from a luminary (lunar solar power)
The Space Review ^ | April 11, 2005 | Sam Dinkin interview with David Criswell

Posted on 04/11/2005 12:33:13 AM PDT by Cincinatus' Wife

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Professor David Criswell is Director of the Institute for Space Systems Operations at the University of Houston.

http://www.isso.uh.edu/

1 posted on 04/11/2005 12:33:14 AM PDT by Cincinatus' Wife
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To: Cincinatus' Wife

Okay, you and all the rest of you crazies can go put mirrors on the moon. In the meantime, I'll be perfecting the nuclear fusion reactor in my garage.


2 posted on 04/11/2005 12:40:05 AM PDT by Termite_Commander (Warning: Cynical Right-winger Ahead)
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To: Termite_Commander
***Power beaming is an excellent way to send power into space. Rather than carting heavy power generation equipment and fuel, all of the mass can stay on the ground. The reference case for Earth to space elevators now utilizes power beaming. Power beaming can also be used to reduce the weight thrown to the Moon to begin scouting, pioneering, and settling. While important to make the cost of the administration’s Vision for Space Exploration reasonable and perhaps someday making space elevators feasible, the biggest value of power beaming may be beaming back to Earth after the Moon is industrialized.

An investment in Lunar industry can produce cell after cell that will have a very long life in the optimal conditions for electronics on the Moon. By producing vast farms of solar cells, power can be gathered without any clouds or atmosphere to get in the way. If the solar photovoltaic power cells are built out of Lunar materials, a small industrial base on the Moon can lead to enough power to export by radar beam back to the Earth. Lunar solar power (LSP) is a low pollution, low operating cost, high capacity power generation technology...............*** Rectifying the case for beaming Lunar solar power

3 posted on 04/11/2005 12:51:42 AM PDT by Cincinatus' Wife
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To: Cincinatus' Wife
So how exactly does the power get transported to earth?

Microwaves???

And how is that done exactly?

That has to be horribly inefficient. And if the microwave energy could be directed in a tight beam if the transmitting antenna ever misses its target we get microwaved...
4 posted on 04/11/2005 12:54:20 AM PDT by DB (©)
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To: DB

Some info at LINK in Post #3.


5 posted on 04/11/2005 1:00:36 AM PDT by Cincinatus' Wife
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To: DB
And how is that done exactly?

Exactly!!

They all seem to gloss over the fact that 100 gigawatts electricity delivered via any technology know would totally fry any and all life at the receiver locations.

Any one who has ever worked around powerful radar stations (Like the NORAD or DEW installations) knows there is the morning bird patrol, sent out to pick up the dead birds fried by the operations of the last 24 hours.

Yet all these reports talk about how easy it is to beam power. Well maybe in the lab, with a safe backdrop.

I don't see any of these folks lining up to have their house and children microwaved 23/7/365 by enough power to run even your household fan.

6 posted on 04/11/2005 1:43:13 AM PDT by konaice
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To: DB; Cincinatus' Wife; konaice; Termite_Commander
Solar power stations on the moon would have to be built all around the moon, as any one spot is in darkness for two weeks out of four.

Some way of sending power around the moon itself would have to be constructed for new moon periods, as the half of the moon receiving sunlight would be facing away from the earth, where the transmiters would have to be located.

Also, some way of transmitting these huge amounts of power between continents on earth would have to be developed and constructed for the 12 hours per day when any particular point on the earth faces away from the moon.

Translation: It ain't ever going to happen!

7 posted on 04/11/2005 2:15:34 AM PDT by rmh47 (Go Kats! - Got Seven?)
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To: rmh47
as any one spot is in darkness for two weeks out of four.

Areas around the polls are in almost total sunlight.

If you don't like that plan. How about launching regolith (lunar dirt) into space and building solar arrays there? It would solve property dispute problems.

8 posted on 04/11/2005 2:20:11 AM PDT by Cincinatus' Wife
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To: Cincinatus' Wife

Why use the Moon when we could simply put SPS's in Earth orbit? The Moon would be a better place as a platform for interplanetary launches, manufacturing rocket fuel from hydrogen, or for observatories.


9 posted on 04/11/2005 2:49:07 AM PDT by WestVirginiaRebel (Carnac: A siren, a baby and a liberal. Answer: Name three things that whine.)
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To: WestVirginiaRebel

It's good for many things and we better get our buns their first.


10 posted on 04/11/2005 2:55:43 AM PDT by Cincinatus' Wife
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To: Cincinatus' Wife
Areas around the polls are in almost total sunlight.

Actually, due to various irregularities in lunar orbital movement, the polar areas nod in and out of sight of the earth, so building right at the polar areas would not be sufficient.

If this concept has any prospect of working, putting the collectors and transmitters in synchronous orbit makes a lot more sense.

11 posted on 04/11/2005 3:06:43 AM PDT by rmh47 (Go Kats! - Got Seven?)
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To: Cincinatus' Wife

The info in post three shows 10,000 watts being transmitted and 500 watts recovered, or 5% of what was sent. That's a serious no go. I don't believe there are any known technologies to provide the capabilities required. Microwave energy that can be reasonably converted back to electrical power is relatively low in frequency with today's technology. Those low frequencies aren’t collimated well. The beam would be huge by the time it made it to earth. And if it could be collimated well the power densities would fry anything that passed through it. Airplanes, birds, people, whatever. Aiming the beam at anything other than the intended receiver could be considered a large-scale weapon of mass destruction. It would destroy pretty much whatever it hit. Getting international approval for such a device would be virtually impossible because of its alternate uses. There would be no prior warning of any attack made by it. A military dream weapon…


12 posted on 04/11/2005 3:07:38 AM PDT by DB (©)
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To: rmh47

Yes a "wobble" is there but it's not much.

Solar panels in space - made from the Moon. Now there's a project worth pursuing.


13 posted on 04/11/2005 3:10:03 AM PDT by Cincinatus' Wife
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To: DB

I don't know if your post is accurate.

They believe their studies will yield a viable product.

I'd like to hear more about this.


14 posted on 04/11/2005 3:12:28 AM PDT by Cincinatus' Wife
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To: Cincinatus' Wife

Yes, we do need to get our buns on the moon and make something of it.

I think a space elevator is more practical than this power generation idea.


15 posted on 04/11/2005 3:13:57 AM PDT by DB (©)
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To: konaice

100 gigawatts. Isn't that the amount of power to send the DeLorean on it's way in Back to the Future?


16 posted on 04/11/2005 3:13:59 AM PDT by Arkie2
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To: DB

I think a space elevator is good too.

There can be two (and many more) good ideas.


17 posted on 04/11/2005 3:15:13 AM PDT by Cincinatus' Wife
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To: Cincinatus' Wife

I'm not saying it's impossible, just extremely unlikely.

It will require a technology still undiscovered.


18 posted on 04/11/2005 3:16:57 AM PDT by DB (©)
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To: Cincinatus' Wife

OK, this is what I am unsure of.

When I drive around, I cross bridges. They all have spaces at the beginning and end, some even in the middle.

These spaces are built in because the bridge expands from heat. It would buckle and disintegrate if there were no spaces.

So what happens if you made a solid piece of steel, filled it with holes so you could run water through it and cool it down, painted it black, and attached one end to a gearbox that was connected to a generator?

We're talking hundreds of thousands, perhaps millions of pounds of pressure per square inch as this thing heats up and expands. And you would get energy from the cooling cycle as well as the heating cycle.

It might even be efficient enough to obsolete my perpetual motion machine.


19 posted on 04/11/2005 3:17:40 AM PDT by djf
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To: Cincinatus' Wife

Being an engineer, one's view is based on what one can do with today's technology, not tomorrow's.


20 posted on 04/11/2005 3:20:24 AM PDT by DB (©)
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