vampyregirl, have you ever seen a scuba or oxygen tank (at 2,000 psi) go off?
Quote:
The man, whom Lloyd would not identify, told firefighters that he was filling the breathing tank with compressed air when the tank’s top apparently separated, exploding the tank, shattering lights and sending it across the room where part of the tank embedded in a wall, Lloyd said.
Death Tanks at 10,000 psi has not been solved. 5,000 scares me. Especially if I am straddling it in a car _________________ ree rah rip ram. sunofabitch godamn. hidey didey christ almighty. rah rah crap
There are hydrogen filling stations although not many yet. It is a myth that hydrogen tanks explode if punctured. Testing has been done on that. A big problem with bringing fuel cells into the mainstream is the financial problem. Fuel cells can't begin to compete with the ICE retail. It will take time before they can.
Is there a future for Hydrogen? Of course there is. Remember people once said the ICE wouldn't fly either. Before that people didn't have much faith in the steam engine when it was first introduced.
You will soon be able to get around the lack of hydrogen refuelling station for your duel fuel ICE with this development from UK electrolyser/fuel cell company domestic hydrogen refuelling station .
They are touting the electrolysers for £2000/$4000, and the inputs are water and electricity. Plus the cost of converting a car to run on H2 (similar to an LPG conversion).
The H2 generated can also be fed into a fuel cell to generate power, e.g. H2 generated from solar cells in the day (by an electrolyser) and burnt to generate leccy at night (fuel cell).
Compressed H2 turns a vehicle into a little rolling space shuttle Challenger. The best way to store hydrogen is in the form of metal hydrides, which are heavy. Accelerating that mass requires energy, precluding H2 from being a viable fuel for vehicles. H2 fuel cells have a degree of applicability as stationary power sources, so long as the energy for hydrolysis doesn't come from fossil fuels.
There are hydrogen filling stations although not many yet. It is a myth that hydrogen tanks explode if punctured. Testing has been done on that. A big problem with bringing fuel cells into the mainstream is the financial problem. Fuel cells can't begin to compete with the ICE retail. It will take time before they can.
Is there a future for Hydrogen? Of course there is. Remember people once said the ICE wouldn't fly either. Before that people didn't have much faith in the steam engine when it was first introduced.
Hydrogen has amazing potential. You can bind it with carbon nanorods that you can make from heavy fuel oil or coal to form a nanorod molecular storage medium. I think the common names for these sorts of hydrogen/carbon nanorod storage media are called gasoline and diesel fuel.
Seriously, hydrogen production is only going to go up over the next several decades, but we wont be using it directly. We'll be using it for oil refining and coal liquefaction.
Last year, I was talking with an engineer from a local company called Air Products, which is the worlds largest producer of hydrogen, though they make all kinds of specialty gases and handling equipment used in industry. They were picked by the US government to design and build prototype hydrogen refueling stations. I asked him what he thought the potential for a hydrogen economy was and he said "nil." I asked him why and he said that it was just way too expensive all around and no competition for gasoline and diesel powered vehicles, though his company was more than happy to oblige.
Out of the horse's mouth, there you have it. _________________ "That's the problem with mercy, kid... It just ain't professional" - Fast Eddie, The Color of Money
Compressed H2 turns a vehicle into a little rolling space shuttle Challenger. The best way to store hydrogen is in the form of metal hydrides, which are heavy. Accelerating that mass requires energy, precluding H2 from being a viable fuel for vehicles. H2 fuel cells have a degree of applicability as stationary power sources, so long as the energy for hydrolysis doesn't come from fossil fuels.
Liquid hydrogen is a very useful fuel if you play to its strengths rather than trying to overcome its weaknesses.
The SABRE engines efficiency comes from the high heat capacity of liquid hydrogen to supercool/compress the incoming air.
This metal hydride crap or storing hydrogen under pressure or liquefying it for car transportation is never gonna matriculate to anything other than a toy industry. It has potentially serious applications in aerospace however.
Compressed H2 turns a vehicle into a little rolling space shuttle Challenger. The best way to store hydrogen is in the form of metal hydrides, which are heavy. Accelerating that mass requires energy, precluding H2 from being a viable fuel for vehicles. H2 fuel cells have a degree of applicability as stationary power sources, so long as the energy for hydrolysis doesn't come from fossil fuels.
Compressed H2 is no more intrinsically dangerous than LPG or volatile stuff like gasoline (google Ford Pinto).
How can metal hydrides be the 'best' way to store H2 for transport (the specific application/example I linked to) if they are too heavy to be usable? The pre-production example in the BBC video works fine on mildly compressed H2, albeit for a modest 25 mile range. The developers cite 100 mile range for heavily compressed H2 (but not liquefied).
Fuel cells are not used in the vehicle. The hydrolyser can of course run on renewable inputs. In fact I think it's only really economical with low cost electrical inputs (whose economics it could revolutionise by acting as an energy store during 'off peak' production).
Compressed H2 turns a vehicle into a little rolling space shuttle Challenger. The best way to store hydrogen is in the form of metal hydrides, which are heavy. Accelerating that mass requires energy, precluding H2 from being a viable fuel for vehicles. H2 fuel cells have a degree of applicability as stationary power sources, so long as the energy for hydrolysis doesn't come from fossil fuels.
Compressed H2 is no more intrinsically dangerous than LPG or volatile stuff like gasoline (google Ford Pinto).
Hydrogen embrittlement of the tank, more explosive fuel, lower volumetric energy density requiring more fuel for the same application all make hydrogen a more dangerous fuel than LPG or gasoline.
I didn't say that hydrides are the 'best' way to store H2 for transport. There is no good way to store it for transport.
I don't think there's going to be any aerospace industry before very long.
What Dezakin said, re: safety of various conventional fuels relative to compressed H2.
I can envision a hydride unit, comparable to a solid propane tank, to fuel a cell that provides energy for domiciles & other buildings or other stationary apps. Then again, you have the transportation problem for recharging the unit when it becomes H2 depleted, and there are probably more viable ways to power a house. In other words, in the short term there probably are some practical uses for H2 as an energy carrier, but they are limited & offer no scalable alternative for fossil fuels.
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ree rah rip ram. sunofabitch godamn. hidey didey christ almighty. rah rah crap 
