Requesting help

[Hihihello]

Dear @Mobulai,
Thanks for answering my question in such a detailed way, thank you very much indeed. You are smart, I am going to start my aerospace engineering course very soon. As I love math, physics, aerodynamics, and diving is my hobby, I often connect them to improve my understanding in physics and math's. The reason why I ask this question is that I hope to utilize the brain power of professional on scubaboard.com and to see whether there are alternative ways to understand this question. However, once again, thank you very much indeed for your time used to answer my question.
Yours sincerely,
Hihihello

 

[Mobulai]

Dear @Mobulai,
Thanks for answering my question in such a detailed way, thank you very much indeed. You are smart, I am going to start my aerospace engineering course very soon. As I love math, physics, aerodynamics, and diving is my hobby, I often connect them to improve my understanding in physics and math's. The reason why I ask this question is that I hope to utilize the brain power of professional on scubaboard.com and to see whether there are alternative ways to understand this question. However, once again, thank you very much indeed for your time used to answer my question.
Yours sincerely,
Hihihello

I see now why you asked about potassium hydroxide based sorbs
I believe EVA rebreathers used in vacuum by astronauts use them, as water ingress isn’t a problem there

Do note that rebreathers for space applications are pure o2 rebreathers (unlike the more commonly discussed here mixed gas rebreathers), and operate at 0.3 bars of positive pressure; that would be a good starting point to refine your search on the matter

I doubt any etCO2 is measured in such cases (I might be mistaken); but maybe normal CO2 in the loop
I think the blocker is humidity— I’m sure there are some previous threads here on scubaboard about that; a quick search should reveal it all (maybe even some research papers)

Edit: one final thought about the sidewinder 2 sorb canister, and this is an extreme simplification (based on the explanation of Patrick when he showed me the can at boot, again I haven’t seen a cutaway model nor analyzed it):
The main change vs the SW1 is that the square canister allows the gas to move across the width not the length/depth
Thus shortening the distance traveled; this will effectively face less resistance
I think this is what you referred to with half the WoB, not for the whole system but just the canisters

Best of luck on your upcoming studies and glad I could help a bit

 

[Hihihello]

Dear @Mobulai,
I think you are talking about KOH? KO2 is more reactive than KOH. As KO2 is superoxide and indeed it might explode when KO2 collides with water when executing water in loop drill. The reason why I am asking this question is that I have noticed that EAC scrubber using something like etfpe can prevent the negative impact due to water in loop, so it won't explode. Besides regarding the previous question, my diving philosophy is that a guy should be able to create his gear from raw materials so that he knows the limit of the equipment(I don't mean that I would use ccr prior to learning.). This is the reason why I asked the previous question and this question. For the previous one, I actually planned to mentally calculate my Deco plan when my wetnote Deco plan was eaten by some animals, and computer was malfunctioning. However, I promised that if I figure out the answer by asking professors in university, I will put the answer here ASAP to contribute to the board and pay it forward, as if those who helped me. Anyways thank you very much indeed for your assistance in my learning journey.
Yours sincerely,
Hihihello

 

[Hihihello]

Also one of the benefits of using KO2 is that it is more reactive, so that the possibility of co2 not being scrubbed is lower

 

[Hihihello]

Regarding the co2 problem, I am asking because I saw some ndir co2 sensor can provide correct reading when water is present.

 

[Mobulai]

Regarding the co2 problem, I am asking because I saw some ndir co2 sensor can provide correct reading when water is present.

Co2 monitoring is something that is highly sought after in rebreathers, do share if you have good leads

I think you are talking about KOH? KO2 is more reactive than KOH.

Could be, I haven’t jumped into the details of either— but regardless, some sort of potassium oxide and water… I would be scared either way
(Still traumatized from seeing potassium dropped into water 20 years ago)

 

[Hihihello]

Dear @Mobulai,
http://diyrebreathers.com/data/uplo...gn_guidelines_for_carbondioxide_scrubbers.pdf
I learned a lot of things from this document and the website.
I saw someone using KOH to increase the rate of reaction of scrubber under low temperature, to prevent hypercapnia.
Using galvanized cell, can prevent the humidity problem?
Yours sincerely,
Hihihello