Unlike typical liquid hydrogen tanks found in prototype vehicles, the new tank was able to retain the entire amount of hydrogen without any leakage of gaseous hydrogen
This development significantly improved the period of time that passes until the start of the hydrogen leakage, compared to other existing tanks that store liquid hydrogen within them for a period of only two to four days. Tanks for liquid hydrogen (LH2) store supercooled liquid hydrogen at a temperature of minus 251 degrees Celsius. Similar to the boiling water in a teapot, internal pressure builds up as the heat from the environment heats the hydrogen inside the container. Current vehicles powered by liquid hydrogen must vent the build-up of hydrogen vapor if they have been parked for three to four days, even when using the best thermal insulation.
In the latest test of a prototype of the new hydrogen tank it showed a thermal endurance of six days and the potential of even up to 15 days and thus could help solve one of the key challenges associated with hydrogen-powered vehicles. Today, the tanks for liquid hydrogen operate at low pressures (2-10 atmospheres). The new cryogenic tank is able to withstand much higher pressures and store hydrogen at a pressure of up to 350 atmospheres (similar to diving tanks) and is able to do so even when the pressure increases as a result of heat transfer from the environment. This ability to withstand high pressures also means that the fuel resistance of the vehicle improves with the emptying of the tank and therefore it is able to store fuel without limit when a third of the tank is full.
Last year, the experimental hybrid vehicle of the team of researchers demonstrated the greatest travel distance derived from a single hydrogen tank - about a thousand kilometers. The latest thermal resistance tests validate a key advantage of cryogenic pressure tanks - they are able to transport liquid hydrogen at high pressure without losing material as a result of evaporation. These advantages make liquid hydrogen powered vehicles more practical in the search for replacements for today's gas powered cars.
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Loehari and Day-Walker:
I don't accept Day Walker's answer because an energy coin and an energy source are basically the same thing.
However, my response is also negative in the sense that I think the question hides a different kind of misunderstanding.
I want to remind you that this is all about the production of a hydrogen tank and not the production of hydrogen.
The need for tanks that store hydrogen at such a high pressure stems from volume limitations that exist in vehicles much more than in other facilities.
Loehari:
No - hydrogen is an energy currency (a way to turn electricity and water into fuel) and not an energy source.
There is a vehicle that is discharged into hydrogen just before use, it breaks down sweet salty water and even tea! The problem is that the performance of this vehicle is really low as of this moment
a question:
Is it possible to use such technology to produce electricity on a national scale?
Yossi's intention in the sentence:-
"In the last test of a prototype of the new hydrogen tank, it showed a thermal endurance of six days and the potential of even up to 15 days." End quote.
I understand this to mean resistance to the conditions in which the tank was subjected to environmental heating for six days. In contrast to existing tanks, it is said that:-
"Compared to other existing tanks that store liquid hydrogen in them for a period of only two to four days." End quote.
Hope I helped you Yossi.
Good Day
Sabdarmish Yehuda.
Hello readers!
I read the articles eagerly
And thank you also for the responses, most of which are enlightening
But unfortunately I could not understand what the word means
this one
I would appreciate it if you could interpret this word
Thanks Yossi
Can't the hydrogen be separated only when needed?
That is, to keep the hydrogen molecule (which does not react) and disassemble as needed.
Granted, the essential difference between a fuel tank and a hydrogen tank is that the hydrogen is held at high atmospheric pressure while the fuel is held at a normal pressure of one atmosphere.
The Hindenburg disaster demonstrated what a rapid fire a hydrogen flare causes, and if you add to that high atmospheric pressure, it is a big explosion.
I think that for hydrogen vehicles to be practical we need to go in a different direction of hydrogen absorbing materials, and not to pressurized storage tanks.
I think from a safety point of view it shouldn't be a big concern.
If I understood correctly, the whole article talks about a tool that can withstand higher pressures?
For some reason I have the feeling that this cannot be a solution if a small car accident can cause a huge explosion.
We need another solution.
Sabdarmish Yehuda
Thank goodness I didn't smoke hydrogen