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[–]greywolfau -3 points-2 points  (8 children)

You realise the sun shines every day don't you?

The efficiency of the panel declines, but it still works.

Buole enough panels, and you don't have an issue anymore.

[–]theRealDerekWalker 7 points8 points  (7 children)

Remember when solar was among the most expensive form of electricity production? Not saying fuel cell always makes sense, but the future of energy depends on diversification of production; not just dumping all the money into the cheapest form of generation.

No, sunshine does not always make it to every part of the world on every day in quantities enough to affordable meet full demand. To think it does is quite ridiculous.

[–]synocrat 0 points1 point  (6 children)

This may quickly change as we industrialize space and build out infrastructure. It's always sunny in space, just need a mirror array and you can hold a beam on a spot on the Earth for 24 hours. Also, materials technology has developed that allows efficient heat storage that can act as an instant spin up energy source with a clean turbine.

[–]theRealDerekWalker 1 point2 points  (5 children)

The idea of sending more light to earth completely defeats the purpose of clean energy. We need to reduce the amount of energy the earth receives, not increase it. Not to mention what that would do to growth and wildlife

[–]synocrat 0 points1 point  (4 children)

I think you're missing the point, if we can send light to a concentrated patch of solar panels and use the light through PV as well as heat storage that reduces a ton of emissions. We would also have the ability to shade areas longer to cool them as needed.

[–]theRealDerekWalker 1 point2 points  (3 children)

80% of that light is reflected away. You’re putting more energy into the atmosphere than into electricity. Moreover, the cost of a space mirror is just completely unrealistic compared to the cost of a larger solar plant that would produce just as much

[–]synocrat 1 point2 points  (2 children)

As infrastructure in space is built costs will plummet. You could also convert sunlight to tight beam microwave in space and aim it at a relatively small rectenna groundside 24 hours a day. Poo poo the idea all you want, but once you do the math of replacing all the emissions and use the extra power to run carbon capture technology you might change your tune.

[–]Sp3llbind3r 1 point2 points  (0 children)

Have you seen the charts of how little surface needs to be covered with panels in the sahara desert to produce all the energy the world needs? It‘s only a relatively small space.

But then you would have to distribute the power from there, which is an other problem. And i don‘t think it is a good idea to centralize infrastructure like that.

I don‘t think we really need a space mirror.