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HHO and you! Answered


Ok, so hho has become the new fad in the mpg race, but is it really effective?  Conservation of energy dictates that the energy required to separate water in to its base components is equal or greater to the energy released during its reconstitution.  The key to making HHO a viable source of additional fuel would be utilizing the waste heat from the engine to provide the electricity needed.

TEG's + exhaust manifold + water = ?

Discuss!

Discussions

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kretzlord
kretzlord

8 years ago

anybody else have some sources of useable waste energy in an engine?

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kelseymh
kelseymh

Reply 8 years ago

I think you hit on the big one -- the waste heat of the exhaust.

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kretzlord
kretzlord

Reply 8 years ago

I was also thinking you could re-route the radiator to make a detour into a bank of TEG's, and have a fresh air flow on the cool side.

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lemonie
lemonie

8 years ago


Fit a turbo-generator to the exhaust?

L

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kretzlord
kretzlord

Reply 8 years ago

now i like that idea, but i'm not really sure about how a turbo affects gas mileage, or are you saying using it strictly as a generator?

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lemonie
lemonie

Reply 8 years ago


Yes, just a generator, otherwise-waste energy is still recovered from the exhaust.

L

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PKM
PKM

Reply 8 years ago

Don't turbos significantly increase load on the engine? I thought that was the cause of turbo lag- the engine has to be running at a speed where the extra power from compressed intake air is greater than the power lost turning the turbine/compressor.

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lemonie
lemonie

Reply 8 years ago

They affect back-pressure, but so does any other exhaust system. If the engine isn't turbocharged it's an easy-ish generator option.

L

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kelseymh
kelseymh

8 years ago

Now that is an interesting proposal, and it raises some very nice quantitative questions:

What temperatures are accessible at either the engine block or exhaust manifold? What's the efficiency of TEGs as a function of temperature, or rather, what is the voltage-temperature function? How much hydrogen can you generate per mile (for example) once the engine is at equilibrium temperature? How does that quantity of hydrogen translate into engine power/efficiency/MPG?

This is an potentially practical idea for making hydrogen, provided the numbers pan out.

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Lithium Rain
Lithium Rain

Reply 8 years ago

Hey, you! Yeah, you with the hard hat! I've been looking for you everywhere!

>insert reasonably intelligent question about your opinion as to the validity of the results with those pesky neutrinos<

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kelseymh
kelseymh

Reply 8 years ago

Start a forum topic :-) I'll paste from my OB when it's there.

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kelseymh
kelseymh

Reply 8 years ago

There was no reason for you to look there :-) I started to write that response here, in reply to you. I realized that was hijacking the forum topic, so I pasted it over to my OB, and wrote the above here instead. Thanks for creating the forum topic!