Comment on Had to burn off some excess oil from my chainmail hauberk. Thought it was cool
Chozo@kbin.social 9 months agoThey said "relatively clean burning fuel". Obviously no fuel is truely "clean", but compared to others, propane is one of the safest to use, especially for this particular use-case.
name_NULL111653@pawb.social 9 months ago
Hydrogen has entered the chat.
18107@aussie.zone 9 months ago
Hydrogen made from methane, or from coal powered electrolysis?
name_NULL111653@pawb.social 9 months ago
Solar panels exist… Just use electrolysis from green sources. If we can’t figure out electricity without coal, then fuel is the least of our problems…
18107@aussie.zone 9 months ago
The problem here is round trip efficiency.
Using a battery to store solar power is about 95% efficient. A small amount of energy is lost to heat when charging and discharging.
Using hydrogen as energy storage is about 30% efficient. A small amount of energy is lost when making the hydrogen, but a large amount is lost when converting it back to electricity.
Unfortunately this isn’t even a solvable problem. The fundamental limit of efficiency due hydrogen to electricity is about 50%. Physics and entropy prevent it from being any higher.
Burning hydrogen for heat is about 100% efficient, but heat pumps (running from electricity) can be over 600% efficient. Heat pumps get the extra efficiency by moving heat rather than creating heat directly.
If you wanted to use hydrogen from electrolysis, we would need 3 to 6 times as many solar panels than if we just used batteries.
whyNotSquirrel@sh.itjust.works 9 months ago
Solar oven isn’t a possibility? I was always wondering why it’s not something done to crack the molecule, I don’t think you can make something greener than a bunch of mirrors oriented on one spot
Also, couldn’t it be offshore? Making drinkable water as a bonus? I guess I’m missing so much knowledge on this because in my head it’s like just perfect, well too perfect to be real
18107@aussie.zone 9 months ago
As far as I’m aware, heating water with mirrors will just get you some really hot steam. I don’t think it’s feasible to split hydrogen from water using heat. Please let me know if I’m wrong.