Liquid Hydrogen - Revision history

Eric: Added some more information

2020-04-02T02:12:06Z

Added some more information

← Older revision		Revision as of 02:12, 2 April 2020
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	*Asyphxiation Hazard (although not as bad as heavier gasses, in large enough volumes, it can displace oxygen, thus ventillation and/or sensors are needed		*Asyphxiation Hazard (although not as bad as heavier gasses, in large enough volumes, it can displace oxygen, thus ventillation and/or sensors are needed
	*As with any hydrogen, a pure flame is invisible in the visible spectrum, and thus may be harder to detect		*As with any hydrogen, a pure flame is invisible in the visible spectrum, and thus may be harder to detect
			*As spacex's starship tests have shown, poorly welded/constructed tanks have a nasty habit of bursting and/or exploding

	=See Also=		=See Also=

Eric: Added some more information

2020-04-02T02:10:19Z

Added some more information

← Older revision		Revision as of 02:10, 2 April 2020
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	*[[Cryogenic Liquid Boil-Off]] caused losses, or required active cooling		*[[Cryogenic Liquid Boil-Off]] caused losses, or required active cooling
	*Asyphxiation Hazard (although not as bad as heavier gasses, in large enough volumes, it can displace oxygen, thus ventillation and/or sensors are needed		*Asyphxiation Hazard (although not as bad as heavier gasses, in large enough volumes, it can displace oxygen, thus ventillation and/or sensors are needed
			*As with any hydrogen, a pure flame is invisible in the visible spectrum, and thus may be harder to detect

	=See Also=		=See Also=
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	=Useful Links=		=Useful Links=
	*[https://en.wikipedia.org/wiki/Liquid_hydrogen The Wikipedia Page on Liquid Hydrogen]		*[https://en.wikipedia.org/wiki/Liquid_hydrogen The Wikipedia Page on Liquid Hydrogen]
			*[https://www.youtube.com/watch?v=7bFJK5kU_UQ Archival Footage of 1960's Testing on Liquid Hydrogen Storage Hazards by the USA Air Force] (shows leaks, and fires, and compares them to similar JP-4, and gasoline etc events) (Didn't detonate in small leaks (1+1/4 gal), only a slow flame (still a flame, but not an explosion) ,similar for 32 gallon (albeit more flame), All in all, without pre-mixing detonation does not happen, in premixed, little to no overpressure was observed, but the thermal radiation may start fires
			**All in all less bad than an ignition event of liquid hydrocarbons (If not mixed with air/oxygen, if ignighted NOT by an explosive, etc), but is easier to ignite
			**Granted this is OLD, and the main measurements were with film? NEEDS MORE RESEARCh

Eric: Added some more information

2020-04-02T01:55:14Z

Added some more information

← Older revision		Revision as of 01:55, 2 April 2020
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	~~'":~~=Basics=		=Basics=
	*The liquid state of hydrogen		*The liquid state of hydrogen
	*Useful as a fuel storage method, and as a [[Cryogen]]		*Useful as a fuel storage method, and as a [[Cryogen]]
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	*Neutron Scattering Supposedly Uses LH2		*Neutron Scattering Supposedly Uses LH2
	*LH2 is also used for particle physics with [[Bubble Chambers]] although they have largely been replacecdd by other technologies		*LH2 is also used for particle physics with [[Bubble Chambers]] although they have largely been replacecdd by other technologies

			=Advantages=
			*Density of storage

			=Disadvantages=
			*It's a Cryogenic Liquid (thus can burn people), and requires intense cooling
			*[[Cryogenic Liquid Boil-Off]] caused losses, or required active cooling
			*Asyphxiation Hazard (although not as bad as heavier gasses, in large enough volumes, it can displace oxygen, thus ventillation and/or sensors are needed

	=See Also=		=See Also=

Eric: Created Page + Added Basic Sections/Info

2019-12-19T20:25:46Z

Created Page + Added Basic Sections/Info

New page

'":=Basics=
*The liquid state of hydrogen
*Useful as a fuel storage method, and as a [[Cryogen]]
*Often Abbreviated as LH2
*According to wikipedia "To exist as a liquid, H2 must be cooled below its critical point of 33 K. However, for it to be in a fully liquid state without boiling at atmospheric pressure, H2 needs to be cooled to 20.28 K[3] (−423.17 °F; −252.87 °C)."
*A Common Rocket Fuel (Usually with [[LOX]] )
*Neutron Scattering Supposedly Uses LH2
*LH2 is also used for particle physics with [[Bubble Chambers]] although they have largely been replacecdd by other technologies

=See Also=
*

=Useful Links=
*[https://en.wikipedia.org/wiki/Liquid_hydrogen The Wikipedia Page on Liquid Hydrogen]