Off-world Power Generation: Difference between revisions

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* the sun primarily produces visible light (not microwaves or gamma...)
* the sun primarily produces visible light (not microwaves or gamma...)
* laser transmission is more efficient than microwave, except where earth's atmosphere interferes
* laser transmission is more efficient than microwave, except where earth's atmosphere interferes
* [https://en.wikipedia.org/wiki/Space-based_solar_power current status]: A Gigawatt-range microwave system would require launching 80,000 tons to orbit (prohibitively expensive)
* [https://en.wikipedia.org/wiki/Space-based_solar_power current status]: A Gigawatt-range microwave system would weigh ~80,000 tons (prohibitively expensive) [https://www.energy.gov/articles/space-based-solar-power more] [https://e-reports-ext.llnl.gov/pdf/372187.pdf lots more]
* [https://en.wikipedia.org/wiki/Solar_cell_efficiency Solar cell efficiency]
* [https://en.wikipedia.org/wiki/Solar_cell_efficiency Solar cell efficiency]


Premises:
Premises:
   
   
  <Earth> <- <Earth-orbit satellite> <- <Earth's moon> <- <L1 solar array>
  <Earth> <-microwave-- <Earth-orbit satellite> <-laser-- <Earth's moon> <-laser-- <L1 solar array>
<Earth> <-clearsky-burst-laser-- <Earth's moon> <-laser-- <L1 solar array>
<Earth> <-clearsky-burst-laser-- <L1 solar array>


* <Earth> <- <Earth-orbit satellite>
* <Earth> <- <Earth-orbit satellite>

Revision as of 23:34, 28 October 2018

Given:

  • earth to moon: 238,900 miles
  • there are four lagrange points that provide constant sun exposure at predictable locations
  • l1 to earth/moon: 1 million miles
  • the sun primarily produces visible light (not microwaves or gamma...)
  • laser transmission is more efficient than microwave, except where earth's atmosphere interferes
  • current status: A Gigawatt-range microwave system would weigh ~80,000 tons (prohibitively expensive) more lots more
  • Solar cell efficiency

Premises:

<Earth> <-microwave-- <Earth-orbit satellite> <-laser-- <Earth's moon> <-laser-- <L1 solar array>
<Earth> <-clearsky-burst-laser-- <Earth's moon> <-laser-- <L1 solar array>
<Earth> <-clearsky-burst-laser-- <L1 solar array>
  • <Earth> <- <Earth-orbit satellite>

Laser transmit antenna in space: 1 meter diameter per GW Receive: Several hundred meters across

  • <Earth-orbit satellite> <- <Earth's moon>
  • <Earth's moon> <- <Earth-Sol Lagrange-point solar array>

Targeting the energy requirement of NYC:

  • Power is measured in Newton-meters per second or Joules per second or Watts.
  • ~3000 trillion BTU in 2016 = 3000 trillion btu / 365 days = 3.4E+11 btu/hr = 1.0036680479e+11 watts = 100 GW
  • A 10 MW photovoltaic grid connected power plant commissioned at Ramagundam is one of the largest solar power plants with the site receiving a good average solar radiation of 4.97 kW h/m2/day and annual average temperature of about 27.3 degrees centigrade [ info]
  • The final yield (Y F) of plant ranged from 1.96 to 5.07 h/d, and annual performance ratio (PR) of 86.12%. It has 17.68% CUF with annual energy generation of 15 798.192 MW h/Annum.