4 ms·
Liquid air is cryogenic - they'll have to either bleed off or spend energy to keep it cooled. The "many weeks" measurements is probably some measurement of blee
by icegreentea2 6y ago
Liquid air is cryogenic - they'll have to either bleed off or spend energy to keep it cooled. The "many weeks" measurements is probably some measurement of bleed off rate assuming no top offs (but I'm just guessing - the company website https://www.highviewpower.com/technology/ https://www.highviewpower.com/technology/ doesn't seem to call it out clearly).
- imposterr 6y agoIf the tanks are strong enough, is cooling required? My understanding is that you'd only need to cool the liquid if the structure holding it wasn't sufficiently strong enough to handle the pressures.
- icegreentea2 6y agoApproximating air as nitrogen... nitrogen cannot exist as liquid phase at room temperature - it can exist as a supercritical fluid though at 5MPa (so 50 atm). At that point it has a density of roughly 56 kg/m^3. At ~1 atm, nitrogen becomes liquid at -194C and has a density of roughly 800 kg/m^3. So your mass density of the system is like 14 times better with liquid nitrogen, and the pressure loading requirements are stupidly lower.
- deleted 6y ago[deleted]
- woodandsteel 6y agoMaking the tanks strong enough to handle the pressure if the liquid turns to gas is very expensive. It is much cheaper to make a tank that just holds a liquid.