bradshsi
Guest
Tassie_Rohan:'Dissolved air' does not exist: there is not an air molecule. Centrifuging water will create water-gas (H2O) bubbles - which will collapse the moment the pressure returns to ambient (like water vapour cavitations around a ships propeller). This pressure increase back to ambient is required to deliver any gas to the diver, including water vapour (unless it somehow leaves the centrifuge still at low pressure, in which case the delivery system will act like a vacuum cleaner and suck your lungs out).. There are just so many things wrong here I don’t know where to start.
Cheers,
Rohan.
You are confusing dissolved gas and cavitation. They are two entirely different concepts.
While it is true that there is no air molecule (air being composed of mixed gases), a small amount of each of these gases will dissolve in the water. We routinely need to remove these dissolved gases when we test pumping equipment in a closed loop. This done by lowering the pressure in the loop below atmospheric (i.e. a vacuum). The gas then comes out of solution. We measure how well the water has been degassed by measuring it's dissolved oxygen content.
OTOH cavitation is the localized lowering of the water pressure (often at the inlet of centrifugal pump impellers) which causes water vapor bubbles to form and grow. As these flow from a region of low pressure to a zone of higher pressure they implode. If this occurs adjacent to a surface it can result in damage over time.
Now whether the inventors system will work is another matter entirely. It seems like a very complicated, probably unreliable and energy intensive way to provide breathing gas to a diver.