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Elizabeth M
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Re: how much energy
Elizabeth M   4/1/2014 6:01:39 AM
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Thanks for your comment, Trenth. I see your point, but I am not sure what you mean by "death rays." I am pretty sure this isn't the Navy's intent, but I would be interested to hear more about what you think.

naperlou
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Blogger
Re: how much energy
naperlou   4/1/2014 1:25:00 AM
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shean: it is not heat buy photons. 

shehan
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Gold
Re: how much energy
shehan   3/31/2014 10:43:59 PM
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@Bill – yes robots are much cheaper than having humans, but not all situations will need humans. We could send robots where there is less decision making required. 

shehan
User Rank
Gold
Re: Efficiency Tradeoff
shehan   3/31/2014 10:41:54 PM
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@Bill – A good question can we transport the energy in a better way than the nature. I think we could beam the energy to the earth in a much stronger method such as using a lens, 

shehan
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Gold
Re: how much energy
shehan   3/31/2014 10:39:20 PM
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@naperlou- It all depends on the heat the sun generates and the closer we could reach to have the solar panels. We should also ensure that the panels could bear the heat. 

shehan
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Gold
Re: how much energy
shehan   3/31/2014 10:37:27 PM
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@naperlou- I am sure we are taking about much energy, I mean much energy than we harvest from earth. 

shehan
User Rank
Gold
Re: Sci Fi to Reality
shehan   3/31/2014 10:36:20 PM
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@Elizabeth  - yes the so called death beams could be very harmful to humans, we might need to create corridor for the beams to travel and ensure that no humans are kept in the area where the beams are received.  

shehan
User Rank
Gold
Re: Complicated yet simple
shehan   3/31/2014 10:34:15 PM
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@Elizabeth – harvesting energy from the sun is one good way to ensure we use renewable energy. Sun has enough power to power up the entire world. The difficult part is to harvest the energy and transfer it to the earth. 

shehan
User Rank
Gold
Re: Complicated yet simple
shehan   3/31/2014 10:28:48 PM
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I was wondering how the harvested energy is transferred from space to earth. 

Trenth
User Rank
Platinum
Re: how much energy
Trenth   3/29/2014 2:22:25 AM
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I hate to be so negative, but this is a terrible idea, and seems like just a way to get money from the taxpayers to make space based death rays.

 

From placing panels in space you gain, 4x over ground based if you can keep it out of the earth and the moons shadow.

You lose at least that much converting rf and back. You lose 75%. You have to keep the RF below about 100 watts per meter squared, that's only 50Watts after conversion. Earth based solar panels would produce 200Watts dc/4 or about the same 50W, and they would do it on our rooftops, without the 10,000 dollars per lb it costs to launch sufficient space! As for getting solar power during a hurricane, that's some fancy pr. just convert wastes to fuels and use them in your backup generators and peak generators when you need it.





Other folks have pointed out this could make a great death ray from space too. I agree. That's why the Navy is backing it.  

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