The End Of Fossil Fuels.

[Succubus]

  Go fuck yourself faggot.  By the way.  When was your last felching session.  And was it with an adult?

No! You're quite entertaining. Don't you be letting the ban hammer fall so soon.

Edit: Reading the rest of this page, I think it's too late.

[Nay_Sayer]

I think I made a friend for life in pill.

Your words are in anger. Let the warm tendrils of FSM soothe your soul and fill your mind with purpose in life.

Thoughts and prayers. RAmen

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  Go hug a puppy at a shelter.  By the way.  You should adopt one.

No! You're quite entertaining. Don't you be letting the ban hammer fall so soon.

Edit: Reading the rest of this page, I think it's too late.

Jokes on both of you. I'm powering my house with both Hydrogen and Lizards in hamster wheels.

I HAVE ULTIMATE INFINITE POOOOWWER!!!

[Fireball]

So if you had a furnace that was preheated to 5000°F using the combustion of hydrogen and oxygen, then injected water or steam into it, that would combust. As in create heat. And being built much more robustly than a nuclear rocket designed to fly, it could be made to last much longer.

what

Physicist #2 (B Sc) agrees. This guy is cracked.

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At work.

You said it was always boobs. Make up your mind.

Boru

Uhm...... alien lizard boobs?

Wait.... I'm sure that's been a sci-fi series, back in the day..... ?

Iguana tits. Don't search the 'net for them.

[LastPoet]

He said CultSmasher? I think he was banned from here IIRC.

[BrianSoddingBoru4]

what

Physicist #2 (B Sc) agrees. This guy is cracked.

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At work.


Uhm...... alien lizard boobs?

Wait.... I'm sure that's been a sci-fi series, back in the day..... ?

Iguana tits. Don't search the 'net for them.

Too late.

Boru

[Mister Agenda]

Isn't water or steam already combusted/oxidized hydrogen? How would a hot furnace make water or steam combust more?

[Alex K]

Isn't water or steam already combusted/oxidized hydrogen? How would a hot furnace make water or steam combust more?

It doesn't, any well-designed furnace will burn all the Hydrogen, and all you can get out is the difference of energy levels of separate H2 and O2 versus H20, which is a fixed number.

The only thing you can do to get the maximum performance is to cool (not heat) the exhaust H2O + Nitrogen mixture which you get from burning the hydrogen, down far enough to let the water vapor in it condense. That gives you an additional 18% of heat. I literally just taught a class on that 1 hour ago

That being said, if you're driving a heat engine, the hotter your primary heat source, the better the efficiency because the theoretical maximum efficiency is = 1-T1/T2 where T1,2 are Kelvin Temperatures. This tends towards 1 for high temperatures though, and it can't ever give you more than the above-mentioned difference of binding energies, usually called the "higher heating value" of Hydrogen, which is 142 Megajoules per kg of Hydrogen burned.

[BrianSoddingBoru4]

Isn't water or steam already combusted/oxidized hydrogen? How would a hot furnace make water or steam combust more?

It doesn't, any well-designed furnace will burn all the Hydrogen, and all you can get out is the difference of energy levels of separate H2 and O2 versus H20, which is a fixed number.

The only thing you can do to get the maximum performance is to cool (not heat) the exhaust H2O + Nitrogen mixture which you get from burning the hydrogen, down far enough to let the water vapor in it condense. That gives you an additional 18% of heat. I literally just taught a class on that 1 hour ago

That being said, if you're driving a heat engine, the hotter your primary heat source, the better the efficiency because the theoretical maximum efficiency   is = 1-T1/T2 where T1,2 are Kelvin Temperatures. This tends towards 1 for high temperatures though, and it can't ever give you more than the above-mentioned difference of binding energies, usually called the "higher heating value" of Hydrogen, which is 142 Megajoules per kg of  Hydrogen burned.

So, it seems that if you could get a furnace up to 5000 degrees, you could leave off 'combusting' the steam.  No?

Boru

[Gawdzilla Sama]

I think our genius is ignoring start-up energy and energy loss. Best way to make a perpetual engine, of course.

[Alex K]

Hi @Boru

There are materials which burn at such high temperatures, but for Hydrogen, I *think* the limit is pretty much a couple thousand celsius because you necessarily have the burnt gas present which needs to be heated by the energy of the combustion
And if 1kg of hydrogen gives you 140 MJ, the max temperature you can achieve is whatever temperature 140 MJ can give you when heating that amount of matter (plus the oxygen)

And in this case, the water vapor will still give you the 18% extra because there's a lot of latent heat stored in steam.

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What actually happens if you inject water into a 1000°C+ hot furnace is that the heat energy is used to split the water back into its constituents, i.e. exactly the opposite of combustion, with not more but less excess heat coming out (bc the energy is invested in making hydrogen). This can be used industrially to produce hydrogen. It's what happened by accident in Fukushima Daiichi NPP when water came in contact with the overheated core and led to hydrogen explosions. That's why German NPPs habe hydrogen absorbers. One can also do it on purpose, i.e. run a high temperature nuclear reactor for the express purpose of splitting water to make hydrogen fuel.

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I think our genius is ignoring start-up energy and energy loss. Best way to make a perpetual engine, of course.

it's worse, he has it exactly backwards, see my last post