Hydreliox

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This article needs to be revised: history including reception of research beyond the section on disadvantages is missing; Advantages and disadvantages? - please make encyclopedic style, thank you. - Fraud ( discussion ) 3:11 p.m., 15 Mar. 2020 (CET)
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Hydreliox (rarely also Hydrelux ) is a gas mixture that is used as breathing gas in research projects . The name consists of the names of the components hydrogen ( latin hydr ogenium , H 2 ) H eli to (He) and oxygen (Latin ox ygenium , O 2 ) together. The composition results from the fact that helium is an almost ideal filling gas because, due to its low density, it is easy to breathe even at high pressures and it does not have a narcotic effect. However, it can trigger High Pressure Nervous Syndrome (HPNS). For this reason, hydrogen is added, which has a narcotic effect and, as an antagonist to helium, can slightly reduce HPNS.

advantages

  • Larger (or very large) diving depths are possible compared to breathing air , helium or other gas mixtures. Theoretically up to 1000 meters depth, only surpassed by the practically not yet usable liquid breathing.
  • No narcotic effect, as no nitrogen is included ( nitrogen narcosis )
  • Very little breathing resistance

disadvantage

  • Possible “ reducing ” chemical-biological effect of hydrogen.
  • Due to the good thermal conductivity of hydrogen and helium, the diver's lungs cool down.
  • Mainly dry dives in pressure chambers; 1988 used in the real "Hydra-VIII" program, whereby a maximum diving depth of 534 m was reached in the Mediterranean with humans; With animals, depths of up to 900 m (1988, "Hydra IX", mice) and 1200 m (1994, "Hydra X", monkeys) could be successfully dived.
  • The general effort and necessary safety when diving to great depths remain. Likewise the necessary decompression and the heat problems.
  • High price
  • General danger of an oxyhydrogen explosion on the surface or in the gas preparation. This risk is less under water and is no longer present at the depth used with the prevailing partial pressure.

Individual evidence

  1. ↑ www.dolacek.de Interesting facts about deep diving for professional reasons .
  2. ↑ Technical diving in underwater , issue 05/2010 from April 13, 2010.
  3. ↑ Peter B. Bennett (ed.), RE Marquis (ed.): Basic and applied high pressure biology. University Rochester Press, 1994, ISBN 978-1-878822-25-3 , pp. 173-174.