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/Solar_cell_efficiency Solar cell efficiency] | |||
Basic premise: | Basic premise: | ||
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* <Earth's moon> <- <Earth-Sol Lagrange-point solar array> | * <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 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. | |||
Revision as of 23:05, 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 require launching 80,000 tons to orbit (prohibitively expensive)
- Solar cell efficiency
Basic premise:
<Earth> <- <Earth-orbit satellite> <- <Earth's moon> <- <Earth-Sol Lagrange-point 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 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.