SmarterEveryDay
5 HN recommenders · recommended in 8 months, 2021–2026
29:34 · 10M views · Feb 21, 2021
A Smarter Every Day episode from aboard a nuclear submarine on how the crew makes breathable air. It covers oxygen generation from seawater, oxygen candles and CO2 scrubbing with amine.
Go-to link when oxygen candles, CO2 capture or submarine air quality come up.
10 comments from Hacker News
Not sure if it's the same stuff exactly or if the cost includes reprocessing but there's an amine cycle that seems to be mostly closed that's used for CO2 removal on submarines. So it's just used to separate CO2 from the rest of the output. I think that's what this sentence is talking about: > Notably, it is projected that this solvent can operate at a regeneration heat rate of 2.0 GJ per tonne CO2 for post-combustion capture Smarter Every Day did a video on it and atmosphere management on a submarine more generally which is pretty neat. The CO2 scrubbing is around 20 minutes. this video
The SmarterEveryDay YouTube channel did a slightly more indepth series of videos aboard a nuclear sub, obviously still censored, but educational. [LINK] The video on producing oxygen was particularly enlightening: this video
Yes, but the context of this post was emergency systems which are purely chemical. For routine operations on e.g. a submarine, [LINK] As other people have mentioned, this is a great introduction to the topic: this video
You might find this series from Smarter Every Day interesting. this video I didn't find a bit about how they make drinking water, but here's an episode about how they regenerate their oxygen on a nuclear sub.
I really enjoyed this Smarter Every Day episode that talks about maintaining air quality on a submarine: this video