One Lithium battery = New SCUBA system?

[londonsean69]

Originally Posted by NotDeadYet

On the other hand it may well be quite useful in applications other than diving and the mad bastard will probably make a mint by selling it to something no-one thought of.

Don't they already have O2 generators on subs?? Although, they do have a slight advantage, the small matter of a nuclear reactor.

Oooohhh, a Uranium-235 powered RB, now that would be cool

GBOR - Glowing Box Of Radiation

[wreckweasel]

Originally Posted by NotDeadYet

You now have the world's bulkiest, most inefficient, costliest and probably unreliable rebreather.

So thats who bought it!

[NotDeadYet]

As soon as I hit "submit" I instantly regretted it...

[wreckweasel]

You have a submit button in the bedroom? Now Im scared.

[NotDeadYet]

Submit? You haven't seen my Club Lash VIP card...

[Scuby]

The bit people have mentioned about needing diluent, isn't that just a misunderstanding of the article? The dissolved gas in water would be air wouldn't it, not oxygen? The article seems to think that they are the same thing, so presumably you wouldn't need any diluent or anything.

David

[londonsean69]

Originally Posted by Scuby

The bit people have mentioned about needing diluent, isn't that just a misunderstanding of the article? The dissolved gas in water would be air wouldn't it, not oxygen? The article seems to think that they are the same thing, so presumably you wouldn't need any diluent or anything.

Why would the dissolved gas be air?

Air is just a blend of gasses, including N2, O2, He, Ar etc.

Plus, not everyone only uses air a dil.

[Paul Evans]

Originally Posted by londonsean69

Why would the dissolved gas be air?

Air is just a blend of gasses, including N2, O2, He, Ar etc.

Plus, not everyone only uses air a dil.

More to the point why would it be pure O2????????

he's not talking about cracking the water molercule into its parts, he's talking about atmospheric air driven into the water by wind and wave action

[londonsean69]

Originally Posted by Paul Evans

More to the point why would it be pure O2????????

he's not talking about cracking the water molercule into its parts, he's talking about atmospheric air driven into the water by wind and wave action

A quick google for dissolved gases seawater brings up;

Dissolved Gases
The concentration of dissolved oxygen and carbon dioxide are very important for marine life forms. Although both oxygen and carbon dioxide are a gas when outside the water, they dissolve to a certain extent in liquid seawater. Dissolved oxygen is what animals with gills use for respiration (their gills extract the dissolved oxygen from the water flowing over the gill filaments). Dissolved carbon dioxide is what marine plants use for photosynthesis.

The amount of dissolved gases varies according to the types of life forms in the water. Most living species need oxygen to keep their cells alive (both plants and animals) and are constantly using it up. Replenishment of dissolved oxygen comes from the photosynthetic activity of plants (during daylight hours only) and from surface diffusion (to a lesser extent). If there are a large number of plants in a marine water mass then the oxygen levels can be quite high during the day. If there are few plants but a large number of animals in a marine water mass then the oxygen levels can be quite low. Oxygen is measured in parts per million (also called ppm) and levels can range from zero to over 20 ppm in temperate waters. It only reaches 20 when there are a lot of plants in the water, it is very sunny with lots of nutrients, and the wind is whipping up the surface into a froth. In any water mass there is a maximum amount of dissolved gas that can be found (after which the gas no longer dissolves but bubbles to the surface). This maximum amount increases with a decrease in temperature (thus cold water masses can hold more dissolved gases ... but they can also have none if it has been used up). So, just because a water mass is cold it does not mean it has a lot of dissolved gases. This concept is a little tricky but just remember that the amount of dissolved gases in seawater depends more on the types of life forms (plants and animals) that are present and their relative proportions.


And another

Seawater also contains small amounts of dissolved gases (nitrogen, oxygen, carbon dioxide, hydrogen, and trace gases). Water at a given temperature and salinity is saturated with gas when the amount of gas entering the water equals the amount leaving during the same time. Surface seawater is normally saturated with atmospheric gases such as oxygen and nitrogen. The amount of gas that can dissolve in seawater is determined by the water’s temperature and salinity. Increasing the temperature or salinity reduces the amount of gas that can be dissolved.

Once water sinks below the ocean surface, dissolved gases can no longer exchange with the atmosphere. The amount of gas in a given volume of water may remain unchanged, except by movement of gas molecules through the water -- diffusion (slow process), or by the water mixing with other water masses containing different amounts of dissolved gas.

Ok, notice how both of these sites mention the constituent gasses of air, but not air itself??
This is because these website know what they mean, whereas the donut who wrote that article speaks of Oxygen in tanks, and air in seawater.
Who is right?

All gasses have different solubility values, therefore they all disolve in seawater to different extents. Air is just a combination of gasses, that's why we can seperate O2 from plain old air. Admittedly the first section does mention wave action, and this will introduce 'air' into the water. People need to stop thinking about air as a gas, it needs to be considered a bland of gasses, and this blend breaks down into its constituent parts when dissolved.

Think about deco, we do not say we are offgassing air, we say we are offgassing the nitrogen that is in air. Our body uses O2, but not N2, therefore we use a part of 'air'.

There, rant over

[Simon TW]

The site does say that he has funding from the israel gov. But he is seeking private investors?

There is many a Chav on the social that is developing something or other by using a "Specail Brew" can. Ive seen them on the street trying it out. Thay have funding from the british Government but wouldn't say no to the odd private investor