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xxerse
reply to post by ChaoticOrder
Low Oxygen Water ???? you mean H2O with less O ?? COOL DUDE!!!
I am an Ex South African Navy Diving instructor and a qualified NAUI instructor for 28 years. I absolutely love the dream but in practice there is no way this will work for a number of reasons.
1. Lets say you have a lung capacity of 5 liters on the surface, at 10m the pressure doubles, ambient pressure at sea level is 1 bar/atms. At 10m it is
2. This means that at 10m you need 10 liters of “air” to fill your lungs. At 20m the pressure is 3 Bar/Atms and therefore you would need 15 liters of “Air” to fill your lungs.
The formulae to work out the pressure at a respective depth is simple : Depth divided by 10 + 1 = Pressure at that depth. The chances of this devise providing you with lets say 10 liters a breath at 10m are slim let alone 15 liters a breath at 20m. See point 2 for further explanation.
2. Pure Physiology. The human lungs/diaphragm are designed for for breathing air at a pressure of 1 bar/atms (sea level)maximum. If you held your breath and dived to 10m your 5 liter lung capacity would be compressed into a volume of 2.5 liter.
Your lungs/diaphragm would have to pull/breath against the external pressure of 2 bar/atms at for example 10m water depth to get your lungs back to the normal 5 liter capacity. The human diaphragm is not strong enough to do this consistently, if at all. Do this experiment for yourself, dive to the bottom of your swimming pool +- 2m and try breath through a hosepipe, not possible, you diaphragm is not strong enough.
Remember that a Dive tank is compressed to 200Bar on average. The first stage on the rig feeds air out equivalent or slightly more than the pressure of the depth that you are at. The second/mouthpiece is a simple diaphragm that releases this air to your mouth when you suck in and stops feeding air when you stop sucking.
3. This is probably the biggest reason why this will not work. Pure Oxygen (O2) becomes poisonous to humans when the Partial Pressure (PPO2) reaches 2. In fact it starts affecting humans less than 2 depending on the person. In fact TEC divers who dive with Trimix and CCR (Rebreather) divers try maintain the PPO2 at between 1,4 to 1.6 maximum. The PPO2 of pure oxygen reaches 2 at 10m and on normal air at 90m.
This device states that it removes oxygen from water so one has to assume that it feeds you pure O2. If you could overcome the physiological limitation of breathing against water pressure and the ability of the device to supply a full breath at a relevant depth you would in any case be limited to a maximum depth of 5m. As stated a wonderful idea but practically impossible in real life.
TDawgRex
Maybe if the firefighter wore a backpack coupled to a water source. As the water flows through the hose it is also flowing through the device providing air.
Would that work?
hellobruce
TDawgRex
Maybe if the firefighter wore a backpack coupled to a water source. As the water flows through the hose it is also flowing through the device providing air.
Would that work?
Here is another idea, just give them a air tank, much lighter, much more air, proven technology!