Ian,

Could you elaborate a bit more as to how this could be performed/executed?

I'm intrigued,

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From:
 "Ian Whitchurch"
 <ian.whitchurch@gmail.com>

 A problem 'half now half later', and
 indeed collapsible tanks, have is there are much more
 space-efficient ways to store hydrogen than as LHyd - for
 example, you can store hydrogren attoms into a metallic
 hydride lattice.

 At that point, it gets tempting to use half the tankage
 size, refilling it from the long term storage and then using
 the new LHyd at the other end - ta da, we just saved a
 decent chunk of volume.