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Toyota builds experimental hydrogen-powered pizza oven and grill. (www.autoblog.com)

submitted 1 week ago by CrimeDad@lemmy.crimedad.work to c/technology@lemmy.world

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I wish I got to do fun little projects like this at my job. Anyway, this proof of concept shows that hydrogen would be a great alternative to propane and natural gas for cooking. Hat tip to @hypx@mastodon.social.

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[–] JohnDClay@sh.itjust.works 52 points 1 week ago* (last edited 1 week ago) (27 children)

Fun project! But replacing gas with hydrogen seems really tricky. Hydrogen is much harder to transport without leaks because it's such a tiny molecule. Electric seems better than trying to still burn hydrogen.

[–] CrimeDad@lemmy.crimedad.work 3 points 1 week ago (16 children)

As Toyota has demonstrated (and speaking from my own experience), it's not that tricky. As for cooking with the stuff, sometimes you just need portability and/or a flame. Electric is a poor choice in those cases.

[–] JohnDClay@sh.itjust.works 7 points 1 week ago (13 children)

Portability is hard for hydrogen since you hadn't liquify it without huge pressures and cryogenic temps, so you need big tanks. But cooking stoves does seem like a pretty good use case.

[–] CrimeDad@lemmy.crimedad.work -2 points 1 week ago (1 children)

Compress it to 10,000psi and it gets portable enough.

[–] JohnDClay@sh.itjust.works 7 points 1 week ago (1 children)

As I said, huge pressures. You'll need super heavy or super exotic tanks.

[–] CrimeDad@lemmy.crimedad.work 1 points 1 week ago (1 children)

What's so exotic about a composite pressure vessel? They're already used in scuba and paintball.

[–] JohnDClay@sh.itjust.works 4 points 1 week ago

Scuba tanks only go up to 5.5ksi. I think you'd need more like composite over wrapped pressure vessels (COPVs) for 10ksi. Those are relatively new even in spaceflight. SpaceX discovered some new physics when their AMOS-6 mission exploded on the launch pad in 2016 due to oxygen freezing inside the composite layers.

Here's some more info on carbon fiber tanks vs COPVs https://www.reddit.com/r/SpaceXLounge/comments/taibc7/in_our_experience_copv_gainpain_flattens_out/

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