Posted on 05/10/2024 5:41:42 AM PDT by Jonty30
Two Korean research institutes are designing a space solar power satellite project with the aim of providing approximately 1000 TWh of electricity to the Earth per year. The 95 gigawatts of nuclear in the US generates 800 terawatt hours per year. Spaced based solar at 120 gigawatts would generate 1000 terawatt hours.
This is an improved proposed Korean Space Solar Power Satellite (K-SSPS) project. It is a conceptual design of the satellite, its end-of-life disposal method, and a first pilot system and experiment.
The proposed system would use 4,000 sub-solar arrays measuring 10 meters × 270 meters and comprising thin film roll-out, with a system power efficiency of 13.5%.
It is not derived from rigorous analyses but rather serves as system requirements for commercial viability.
The system will have a mass of 10,000 tons per 2 gigawatt module and transmit microwave at a frequency of 5.8 GHz to Earth via a 1.0 square kilometer antenna. The microwaves can be converted on the ground to usable electricity via rectennas, which are special receiving antennas that are used for converting electromagnetic energy into direct current (DC).
On the ground, the researchers propose to place 60 rectennas with a diameter of 4 km along the Korean Demilitarized Zone (DMZ). In that case, 60 satellites will have to correspond to the 60 rectennas. If each rectenna could generate 2 GW, the total power collected would be 120 GW.
(Excerpt) Read more at nextbigfuture.com ...
There is power required to convert it to microwaves and beam it to the ground, then power loss converting it from microwaves to electricity. And then should it be assumed that no power is lost in the transmission through the atmosphere regardless of weather? Don’t think so. Total power losses are not going to be negligible, I suspect.
My point is that they probably haven’t thought this through...
...or that they have, and with an ulterior motive.
I never heard of "inverting sound waves". How is that done?
My point is that the whole idea is wildly impractical. No one who is the least bit serious is considering this for a minute. It’s idiotic.
And when your toaster is plugged into the array, you’ll hear this:
Good, good, good, good vibrations (oom bop bop)
She’s giving me the excitations (excitations, oom bop bop)
I’m pickin’ up good vibrations
Agreed.
But try they will.
Like noise canceling headphones
Electronic signal can be reversed then sent into an amp and speaker.
The idea (which would not have worked ) would require fast signal switching but this is possible. Where the plan fails is that the signal level has to be matched too. Where the listener is located but it has to be matched everywhere, for all locations. This can’t be done. So the city would be paying for something that is technically impossible.
“transmit microwave at a frequency of 5.8 GHz to Earth via a 1.0 square kilometer antenna.
Birds will explode in just a second.......................”
2 gigawatts is 2 billion watts spread over a receiving antenna that’s 4000 meters wide is only 156 watts per square meter of surface area the beam diverges from GEO orbit four times its width of the 1000 meter transmitter.
Sunlight is 1000 watts per square meter on the earth’s surface. Birds won’t even warm up at night in the beam barely.
These days must be at geosynchronous orbit at ten thousand tonnes each...the largest rocket on earth is Starship by SpaceX it is twice the size of the Saturn V in takeoff thrust and LEO payload with a raptor based kick stage it could put 42 tonnes into GEO and bring back the OTV to LEO for starship to recover it the whole system is then reusable. So how many Starship launches to build a single 2 gigawatt station? 238 for 10,000 tonnes having 8 starships and launching one a day land recovery refurbish in 6 days between each launch would be 365 launches per year with a fleet of 8 leaving one on orbit at a time the others are in referb. Elon plans for Starship to be like an airplane land and ready to launch again in hours not days but a 6 day period seems less ambitious.
For those who are SpaceX fans this person did the mass balance for a hypothetical Raptor based OTV the numbers are impressive once you can throw 150 tonnes into LEO you can build massive things in space this is what Starship is all about and it will be fully reusable. Liquid methane is cheap and so is LOX starship needs a few million in each to fly.
https://www.reddit.com/r/space2030/comments/19038iz/thoughts_on_a_reusable_otv_for_starship/
It could attract birds instead, if they find it to be pleasant.
But then I'm a drummer, so what do I know? I currently have a top line Roland electronic drum kit that I send those analog? signals to a small 60 watt amplifier if I don't want to use headphones.
You know all you need to understand that it was a con. The city council thought they could do it but it really is beyond the concept of sound engineering. Imagine trying to cancel the sound from your drums. Now if you pick one spot in the room, you may be able to do it there. But every place else some sound would exist that was not cancelled. So you woud need more speakers placed in all directions. and the sound engineer would need to adjust the level at each location to continue to cancel at every location. Finally the drummer would hit a louder or softer rip and everything would be out of adjustment again.
The answer? If it seems too good to be true, it probably is not true.
10,000 tons boosted into stationary 22,000 mile orbit, then constructed out there...somehow. Yeah, no problem.
Pie in the sky, literally.
“The system will have a mass of 10,000 tons...”
The entire ISS weight is 1 million pounds or 450 tons.
I think I got it now. Thank you.
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