One human produces about 1 kg of CO2 in 24 hours. We can idealize a perfect CO2 stripper as a magic box that inhales air and spits it out at 0 ppm. If you want a steady-state concentration of 500 ppm for 2 people, then we can see how much air-flow is required to lock up 2 kg of CO2 in 24 hours. This comes out to about 100 cubic feet per minute. This is the bare minimum air flow for any CO2 stripper
Wait, why does stripping one person’s CO2 require more airflow than breathing (0.3 cubic feet per minute)?
Because the air you breathe out has much more CO2 by volume than the air you’re processing (it diffuses quickly). See my comment elsewhere for a potential way around this, though.
Wait, why does stripping one person’s CO2 require more airflow than breathing (0.3 cubic feet per minute)?
Because the air you breathe out has much more CO2 by volume than the air you’re processing (it diffuses quickly). See my comment elsewhere for a potential way around this, though.
Ah, silly me. Thanks!