I don't understand, how did we get from tapping the oxygen dissolved in water to using mini portable oxygen tanks?
Wasn't the idea of Triton to filter water for the oxygen dissolved in it? Did they back-track on this claim and go to some portable liquid oxygen tank concept?
Obviously that opens up a whole other set of issues, not to mention that 100% oxygen is not breathable, it is toxic. There will need to be nitrogen in the mix or another gas. Even if they use liquid air, when a gas under pressure is evaporated, heat is drawn out of the liquid and surrounding fixtures to expand the gas.... causing a big drop in temperature.
Either way, if they just take a simple scuba system and miniaturize it, you will just have a much shorter duration to be able to dive from. Scuba tanks normally have compressed air that has been filtered and dehumidified.... It is not liquid, just denser gas.
Based on some online resources (example
http://scuba.about.com/od/scuba101/p/How-Long-Does-A-Scuba-Tank-Last.htm), a regular 80 cubic ft scuba tank will last about 45-60 minutes on an average dive within safe limits. Now imagine taking 1/10th of that volume like something that will fit in the Triton.... we are talking 6 minutes worth of compressed air?
Now with respect to Dewer flasks (insulated cryogenic bottles), tanks, liquid versus compressed, cooled versus room temperature.... Triton is basically just blowing more smoke up everyone's ARSE at this point.
I don't think they know crap all about what they are doing and inventing things as they go along. Extracting breathable air from whatever source they want to use is going to be a complicated task.
You cannot simply strap some cryogenically cooled air on to your face while you swim around and expect to breathe the evaporation. You also can't just throw a couple of tanks with compressed air on your face unless you are doing what the scuba people are doing and limit yourself to 6 minutes of air for a tiny tank. Nevermind the fact that you have to fill them up each time, the cost is going to be astronomical.
You are better off creating a floating "air supply" with a tube going down to your mouth and towing it behind you as you swim. That would pump air from the atmosphere down (like the old diving helmets).... Hey, I think I discovered a new IndieGogo campaign.... Time to start some renderings and making videos...