storing gaseous hydrogen takes one ENORMOUS amount of space, while storing
liquid hydrogen takes some enormous equipment that takes enormous power to run.
someone once was trying to come up with some "honeycomb" material that store
gaseous hyrdrogen in high densities, but I haven't heard of them in a while.

While I agree that the scheme is somewhat harebrained, and likely taken as
whole comes out on the negative side energy wise; why store the energy in
a chemical battery, why not use it to break the bonds in the H2O molecule
and store the gasses? I think the energy required by the pumps to accomplish
this would probably be sufficient to cause the whole wacky idea to come
acropper.

Cheers
Marty

JAXAshby wrote:

storing gaseous hydrogen takes one ENORMOUS amount of space, while storing
liquid hydrogen takes some enormous equipment that takes enormous power to run.
someone once was trying to come up with some "honeycomb" material that store
gaseous hyrdrogen in high densities, but I haven't heard of them in a while.



Excactly, as for 'honeycomb', I believe you're thinking of metal hydride storage,
as is used for acetylene bottles, I think it's a well proven technology.

Cheers
Marty

didn't make it to fuel cells at this point, though it has been "nearly here"
for a couple decades.

If it works so extremely well for heavy, small volume welding bottle tanks why
hasn't it caught in the much more profitable market of fuel cells?

Excactly, as for 'honeycomb', I believe you're thinking of metal hydride
storage,
as is used for acetylene bottles, I think it's a well proven technology.

Cheers
Marty

JAXAshby wrote:

didn't make it to fuel cells at this point, though it has been "nearly here"
for a couple decades.

If it works so extremely well for heavy, small volume welding bottle tanks why
hasn't it caught in the much more profitable market of fuel cells?


I believe the poblem lies in the rate at which the gas can be extracted/stored,
this is a function of the surface area of the hydride, for large fuel cells used for
transportation functions you can't get enough gas to feed the fuel cell during periods
of heavy demand.

Cheers
Marty

I thought also the "energy density" was much worse as compared to gasoline.

I believe the poblem lies in the rate at which the gas can be
extracted/stored,
this is a function of the surface area of the hydride, for large fuel cells
used for
transportation functions you can't get enough gas to feed the fuel cell
during periods
of heavy demand.

Cheers
Marty