Originally Posted by
MAN Pax
When I was studying Computer Science in the 80's the very idea that a passable video stream over a copper phone line was science fiction - both with bandwidth and the compression technology required at both ends.
Contrary to the situation discussed here, with telecom there were not physical\chemical limitations with transmissions.
As it was correctly pointed, current limitation is with fundamental laws of physics and chemistry and with material science as well.
10x increase of battery density with the same weight would be sufficient to transfer most passenger cars to electric ones. But it won't be sufficient for heavy-duty trucks (25x increase required) and planes (50x increase required).
Considering battery efficiency\density increase in last 30 years, unless there are fundamental discoveries in physics\chemistry, chances that you will see electric power replacing fuel is quite slim in next 50-100 years.
Originally Posted by
Dieuwer
What is the energy density of liquid hydrogen or liquid ammonia compared to Jet-A?
About 3x for liquid hydrogen.
Originally Posted by
Dieuwer
Also, if you can find a way to store a lot of hydrogen/protons in a safe matrix at higher densities than the liquid itself, would be a breakthrough.
Anything colder than liquified natural gas is very difficult to handle and liquid hydrogen specifically is extremely dangerous. Ask SpaceX on that...
https://en.wikipedia.org/wiki/Liquid_nitrogen#Safety
https://en.wikipedia.org/wiki/Liquid...cal_properties
https://en.wikipedia.org/wiki/Liquid...gen#Properties