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Thread: Artificial gills - how?

  1. #1
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    Artificial gills - how?

    Found a website some time ago, that claimed to have figured out how to make a gismo that allowed you to breathe oxygen from the surrounding water, and they were seeking crowd funding to get it on the market. Sounded very exciting, however, a quick readthrough of the claimed principle showed it as a massive hoax, trying to steal mo money from the gulliple of the world.





    But... just out of curiosity... could it be made to work? Like, you put on some kind of stormtrooper helmet, which then diffuses oxygen in and diffuses excess carbon dioxide out into the surrounding water, allowing you to breathe inside an air bubble constantly being automatically kept at set levels of O2 and CO2 (and N2?), and then you could be under water as long as you like, with limited bulky equipment and no gas limit from a SCUBA tank.


    Would there still be issues of decompression sickness and nitrogen narcosis, is what I can't figure out right now. And how deep would you be able to go before physics would still kill you? Tens of meters? Hundreds? Thousands? Provided that the diffusion issue could even be solved.



    (A game I played recently, where your character wore a helmet and could stay under water indefinitely.)
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    Member LT Greenbean's Avatar
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    Hah, suckers.

    They need to take a page out of my book. I invested my last 10K into a Nigerian prince who's going to turn it into 200,000 dollars. Now THAT'S a return of investment.

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    Veteran Member EnigmaO01's Avatar
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    The problem with the idea is there is much much less oxygen available in the water than in the air. In water it's measured in mg/l (milligrams per liter) or ppm (parts per million). In the air around us oxygen is typically about 21 percent. And as humans we couldn't make it on mg/l or ppm even with a full saturation of about 13 mg/l.

    To get an idea of what mg/l or ppm is think of a pond with a million gallons of water. If 12 gallons of that was oxygen it would be 12 mg/l or 12 ppm.
    Last edited by EnigmaO01; 23rd December 2017 at 05:35 AM.
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    Galactic Ruler Spookycolt's Avatar
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    Humans can breath liquid but it must be very oxygen rich and the liquid must also be able to dissipate carbon monoxide efficiently.

    Simple water is not possible in either case for humans to breath.

    Other liquids such as Perflubron carry double the oxygen we need and easily gets rid of the dioxide but the only problem is that human lungs simply aren't strong enough to circulate the fluid for a very long period of time.

    Minutes in most cases.

    You would need some sort of mechanical lung device to be able to get the circulation you need.

    So yes, breathing liquids was figured out decades ago we just don't have the tech to make it practical yet.

  5. #5
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    How do mermaids breath?
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    Veteran Member Devil505's Avatar
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    Quote Originally Posted by EnigmaO01 View Post
    The problem with the idea is there is much much less oxygen available in the water than in the air. In water it's measured in mg/l (milligrams per liter) or ppm (parts per million). In the air around us oxygen is typically about 21 percent. And as humans we couldn't make it on mg/l or ppm even with a full saturation of about 13 mg/l.

    To get an idea of what mg/l or ppm is think of a pond with a million gallons of water. If 12 gallons of that was oxygen it would be 12 mg/l or 12 ppm.
    How do large fish get enough oxygen from seawater?

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    Galactic Ruler Spookycolt's Avatar
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    Quote Originally Posted by Devil505 View Post
    How do large fish get enough oxygen from seawater?
    Their bodies are made for it, humans are not.

    We need a far larger intake of oxygen than water can provide.

    Just different biology's basically.

  8. #8
    Veteran Member EnigmaO01's Avatar
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    Quote Originally Posted by Devil505 View Post
    How do large fish get enough oxygen from seawater?
    Fish only need small quantities of oxygen compared to mammals. Period.

    Mammals are a very inefficient species. They need constant calories and need to keep their body temps up. Fish can go for long periods without food and take on the water temp around them with a few exceptions (bluefin tuna).
    Last edited by EnigmaO01; 28th December 2017 at 08:05 AM.

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    Veteran Member MaryAnne's Avatar
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    Quote Originally Posted by Devil505 View Post
    How do large fish get enough oxygen from seawater?
    How does Enigma grow such huge fish in a small tank? That is the question.
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    Thought Provocateur NightSwimmer's Avatar
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    It is feasible to generate breathable air from water, but the gear and the required power source would be too massive to saddle an individual diver with.

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