[PSUBS-MAILIST] Manual Scrubber

[Alan James via Personal_Submersibles]

 James, maybe just have a spare fan! If the scrubber failed it would either be the power supply or the fan, or clogging with soggy absorbent (which could be replaced). It would take a while for the sub to get to dangerous CO2 levels if the scrubber broke down. And you would just head for the surface anyway. Perhaps look at ways of switching between power sources easily. On my build, which is a small one person, I am having two scrubbers (as Deep Worker does). Another thought is to tip out half the absorbent and try the manual method through a thinner layer of absorbent! Alan
    On Monday, June 21, 2021, 06:35:01 AM GMT+12, James Frankland via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 Hi all.Ive been experimenting with various manual "breath through" scrubbers for use in an emergency, and i have finally come up with a solution that works for me.  
Ive been testing an anesthesia scrubber cartridge.  This has turned out really well.
Previously I made breathing tubes and masks that utilized the main scrubber, but the trouble is that they were all too difficult to breath through.  I made one with a battery electric fan to assist in breathing and even one with a CPR bulb in line to assist.  Nothing really worked, but this new one is really good.
Its a cartridge for an anesthesia machine and has spherical balls on CO2 absorbent which makes it easy to breath through.  I used various different masks until i got one that was easy enough to adapt to the hose and comfortable.
I only did half an hour as it was so hot, but I got cabin CO2 from 5000ppm to 600ppm I think.  The main scrubber was on, but obviously the manual one was taking the most of it.  

Anyway, I feel much more confident I can control CO2 in an emergency now.
If anyone is interested, i can send more details of the parts used and modifications, which were super simple.
Pic attached and a video of me using it.  Skip to 7:35 for the manual scrubber test.
RegardsJames
https://www.youtube.com/watch?v=yyHlPgrN57Q
  

_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20210620/c6766bdc/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 20210619_170803.jpg
Type: image/jpeg
Size: 187411 bytes
Desc: not available
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20210620/c6766bdc/attachment-0001.jpg>