> If (optimistically) we can pressurize the helium to 2 atmospheres
It's been a long time since my physics classes, but wouldn't the require 4864 megajoules of energy [0] while raising the temperature of the gas from something like 20C -> 113C?
Spreading that energy-use over 15 minutes, maybe 5 megawatts dedicated to compression.
Conceptually, since the airship is tethered to the ground during that compression, the power could be sourced from a ground tether as well. The problem would be the pressure vessel, which is why something like a 200,000 m3 1 atm helium going to 150,000 m3 1.33 atm would be more reasonable.
It's been a long time since my physics classes, but wouldn't the require 4864 megajoules of energy [0] while raising the temperature of the gas from something like 20C -> 113C?
Spreading that energy-use over 15 minutes, maybe 5 megawatts dedicated to compression.
[0] https://www.omnicalculator.com/physics/thermodynamic-process...