Lights out for London: Giant space mirror to replace street lights by 2050?, page 1


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Topic started on 8-2-2013 @ 04:49 AM by sajuek
I'm putting this in the Gray area as I don't have a source I can link to. A close member of my family holds a high up position in the EU Energy Efficiency Directive and this is one of the ideas presented to him from a group of scientists in a "Behind closed doors" talk.

The premesis is simple, put a 100-meter wide mirror in space and use it to reflect light from the sun to light up London all night long. It would be constructed from 200 smaller pannels which would be constructed once in space. Think Ikea flatpack furniture. It would light up a 13 mile diameter area from space with the intensity of up to 20x that of the moon.

This is not an unheard of concept either. The Russians successfully managed a 5km lit-up area in 1992 (I hate to use wiki, but):
en.wikipedia.org...(space_mirror)

And here's some science. www.triz-journal.com...

"Blinders" will be put on various points of the mirror to keep parks and other wildlife areas in the dark to preserve wildlife, and streetlights will still be kept available as a back up incase the mirror was destroyed either by way of a natural disaster or by an enemy.

There are a few pros and cons to this.

Pros:
Energy free.
Non-reliant on the powergrid so doesn't need to worry about blackouts.
Mirror can always be moved to help other areas and other countries during a blackout or disaster.
Military implications of being able to eliminate darkness anywwhere in the world.
Potential agricultural benefit of providing plants with 24/7 sunlight.
Improved solar panel efficiency

Cons:
Very high initial cost
Damaged mirrors from space junk would be difficult to replace and methods to mitigate the risks from space junk are still in their infancy.
Application is limited (Although not removed entirely) on a cloudy day.

So what do you think? Is this a good idea? Would you support it if proposed? Are there any pitfalls or other cons you can see from such technology?
edit on 8-2-2013 by sajuek because: (no reason given)
edit on 8-2-2013 by sajuek because: (no reason given)



reply posted on 8-2-2013 @ 05:05 AM by nerbot
reply to post by sajuek



I say this is nonsense and someone is pulling your leg because they know you are a member of this site.



reply posted on 8-2-2013 @ 05:55 AM by winofiend
reply to post by sajuek



I dunno though, the light would be very dispersed. I doubt it would do away with all artificial light in that area, so it would only cut costs not eradicate them.

the mirror would have to constantly shift position to match the location.

it's bad enough getting a broke street light fixed in most places let alone calling up to complain that the space mirror is stuck.


reply posted on 8-2-2013 @ 09:52 AM by sajuek
Originally posted by Gridrebel
OP, your first link is for a Russian newspaper, nothing about the topic. From your second link, it was a complete failure when they tried it. It sounds like a good idea but not viable, unfortunately. My emphasis on the gist of failure in below infor.

Abstract. The article analyzes the failure of the Russian project 'Znamya', which is better known as "Space Mirror". When unfolding, the space mirror membrane caught on the antenna that projected over the space station body.

Using TRIZ, the causes of the failure were analyzed and a number of solutions for improving the reliability of the flexible membrane unfolding under weightlessness were proposed.


Introduction. The space mirror that reflects the Sun's rays onto the nightside of our planet is one of the impressive space projects. In 1993, the spaceship "Progress M-15" placed into orbit a 20-meter film mirror (the project "Znamya"). The mirror unfurled and produced a light spot that was equal in strength approximately to one full moon. A huge plash of sunlight glanced over beclouded Europe to be seen only by astronomers on the top of the Alps.


edit on 8-2-2013 by Gridrebel because: (no reason given)


The links URL is fragmented by the brackets. Look at the disambiguation on the wiki page and click on the "Space Mirror" part just at the top.

I never said that a smaller, 20-meter mirror would provide as much intensity. To quote from the wiki page you couldn't find:

"The Znamya 2.5 was a successor to the Znamya 2, which was deployed on 5 February 1999. It had a diameter of 25 m, and was expected to produce a bright spot 7 km in diameter, with luminosity between five and ten full moons"

And I never said that this was full steam ahead, going to happen 100% without a doubt and I didn't even say that it was anyone's plan to even put in action. If you all bothered reading what I actually said, I only said that this was a proposed idea by some scientists to someone I know who is part of the decision making process in the EEED, notice that the title has a question mark? It was proposed as a practical solution to a practical problem and it has scientific theory behind it that it'd be possible, within the specifications of what they need it to do.

I shared it because it was an interesting concept.

Stop putting words in my mouth. Thanks.
edit on 8-2-2013 by sajuek because: (no reason given)
edit on 8-2-2013 by sajuek because: (no reason given)




reply posted on 9-2-2013 @ 05:09 AM by woogleuk
This will not happen, the cost will be too great to justify it, but more importantly the negative environmental impact will be astronomical. Wildlife will suffer as a result, so I highly doubt it will be done.



reply to
post by penninja



Do you have proof that the British royal family are vampires, or are you just running your mouth of like an uneducated small school child?
edit on 9/2/13 by woogleuk because: (no reason given)



reply posted on 9-2-2013 @ 07:42 PM by Gridrebel
reply to post by sajuek



I am not putting words in your mouth and I appreciated you bringing the concept idea to 'light'. I was simply pointing out that it was a failure when it was tried and it did not accomplish what they expected. Don't take it personal.
edit on 9-2-2013 by Gridrebel because: (no reason given)

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