[PSUBS-MAILIST] CO2

[Jon Wallace via Personal_Submersibles]

 Alan will like this, ChatGPT says 0.0523 kg CO2 within 1217 liters (approx volume of K350) converts to 21,891 ppm.  That corresponds closely to the empirical results Steve McQueen got with his K-250.
Jon

    On Saturday, May 31, 2025 at 12:28:47 AM EDT, Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 
Per the ABS RULES FOR BUILDING AND CLASSING UNDERWATER VEHICLES, SYSTEMS AND HYPERBARIC FACILITIES (2024):

Section 8 
Life Support and Environmental Control Systems

8.5
Design Principles

8.5.5
Standard Person (2013)

Carbon Dioxide (CO2) Produced:
0.0523 (0.115) kg (lbs) per hour at 1 atm.

Sean



-------- Original Message --------
On 2025-05-30 20:46, irox via Personal_Submersibles wrote:


One consideration. CO2 is heavier than Nitrogen, so it may sink to the floor, if the meter is near the floor the reading may not be representative of the actual cabin CO2 level. Also if the meter is somewhere than CO2 can 'pool' around it reading may be higher.

 

Moving around will also help mix up gases which may help give a more accurate CO2 reading.

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