Caridorc Tergilti

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Conjuring An Evolution To Serve You

Extremely cool evolution experiment where E. coli bacteria evolve to eat citrate along with many other interesting happenings.

The Economics of a New Energy Source

Yes, I meant plummeting "within reason" (like x10) not plummeting to extremely low values that, as you correctly said, are not possible given the energy cost.

The Economics of a New Energy Source

I am not really sure about that. There is not only a huge money cost but also a huge energy cost when sending something into orbit, would the panels even make back the fuel spent to send them? Even if the rocket hardware is reused 100% with no serious maintenance costs (reusing costs more fuel) would the panel even make back that fuel energy alone? I did not do the math but maybe not even that. If we could put them in orbit with a space elevator almost for free the tune would be way different though.

The Economics of a New Energy Source
  • Very good point: I think the website I linked to refers to peak power, so the Kilowatthours would be lower. (not sure on this, sorry)
  • If the panels on orbit last double the time and produce double the energy that is only a factor of 4, while the system is about 300 times more expensive. (but again you have transmission losses that I did not consider)
The Economics of a New Energy Source

SpaceX's Falcon 9 now advertises a cost of $62 million to launch 22,800 kg to LEO, $2,720/kg. https://ttu-ir.tdl.org/bitstream/handle/2346/74082/ICES_2018_81.pdf 

Given an average solar silicon price of around $9 US per kilogram in 2020 https://www.solarquotes.com.au/blog/solar-silicon-price-hike/#:~:text=Compared%20to%20the%20average%20solar,%2434%20Australian%20dollars%20per%20panel.

 

This would increase costs 2720 / 9 = 302 times.

The cost of a solar electric system is measured in dollars per watt. The average cost for a residential system is currently $3-5 per watt. That means the average 5-kW residential system will cost $15,000-$25,000, prior to tax credits or incentives. https://sites.energycenter.org/solar/homeowners/cost#:~:text=The%20cost%20of%20a%20solar,to%20tax%20credits%20or%20incentives.

So this system would cost about 4*302 = 1208$ per watt.

This calculation is extremely approximate, but no, it will never work, even if the cost of sending a kg to orbit plummets.

DALL·E 2 by OpenAI

Thanks, added the comment in the correct place now.

DALL·E 2 by OpenAI

Let's have fun with recursion!

A checkerboard where each square is itself a checkerboard.

A cube with mirrors on both sides, the mirrors show multiple reflections of the cube.

A person wearing a shirt with an image of that person wearing that shirt.

DALL·E 2 by OpenAI

Let's have fun with recursion!

A checkerboard where each square is itself a checkerboard.

A cube with mirrors on both sides, the mirrors show multiple reflections of the cube.

A person wearing a shirt with an image of that person wearing that shirt.

Omicron Post #4

Immune erosion is used to make people understand that immune escape is only partial and not total

Book Review: Spark! How exercise will improve the performance of your brain

Thanks for your feedback, in fact correlation is not causation and we must be very careful about self-selection effects. This is not a self-selection effect but still a correlation/causation enigma that I found interesting in recent times: high vitamin D levels were found to be heavily anticorrelated with severe COVID in observational studies, but people of old age are both sensible to severe COVID and have lower vitamin D than average, not only that but people with a healthy lifestyle of many outdoor walks also have higher vitamin D! Is this causation, correlation or both? There is a very interesting article about this on Astral Codex 10 (COVID/Vitamin D, Much More Than You Wanted To Know)

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