Re:Blue Origin manufactured solar cell prototype from lunar ...
by sbierwagen on Tuesday February 14, 2023 @03:23PM
(#34795425)
>A 10 ton rock, lifted up to 50m high, will store up to 810M Joules at moon gravity
Wrong prefix? I think you meant 810K Joules.
For Earth gravity: 10,000 kg times 9.8 m/s^2 times 50 m = 4.9 megajoules, 1.36 kilowatthours. (Anker sells a 2.04 KWh battery pack for US$1999: https://www.anker.com/products/a1780)
Again, that's for Earth gravity. Lunar gravity: 10,000 kg times 1.62 m/s^2 times 50 m = 0.81 megajoules, 0.225 kilowatthours.
Gravity storage isn't economical on Earth, and it's really not economical on the Moon, where gravity is lighter.
Wrong prefix? I think you meant 810K Joules.
For Earth gravity: 10,000 kg times 9.8 m/s^2 times 50 m = 4.9 megajoules, 1.36 kilowatthours. (Anker sells a 2.04 KWh battery pack for US$1999: https://www.anker.com/products/a1780)
Again, that's for Earth gravity. Lunar gravity: 10,000 kg times 1.62 m/s^2 times 50 m = 0.81 megajoules, 0.225 kilowatthours.
Gravity storage isn't economical on Earth, and it's really not economical on the Moon, where gravity is lighter.