Quote:
| Originally Posted by Padowan Whilst deco-ing, your body if off-gassing inert gasses from your tissues into your bloodstream to be transferred into the lungs (if there is a sufficient partial pressure gradient) then breathed out. Now on OC, this "inert rich" (or just richer than the inspired gas) is breathed out into the water, never to be seen again, so this gas is most definitely removed. On a CCR, this inert gas is breathed out into the breathing loop, which you breathe in again. Surely over time the inert loading of the breathing loop increases, |
Stop right there.
The loop contains oxygen at the set point.
Provided you haven't changed the diluent then the gas you are off gassing will match the loop gas (helium/nitrogen ratio). The computer will be working on the right numbers. Even if you suddenly burped a great blob of inerts into the loop the controller would promptly get the O2 back up to spec and you'd blow off the residual.
I can see no reason to switch to O/C except for an air break or because the scrubber is getting past it's sell by date.
nigelH