Quote:
Originally Posted by Ecky
Botting high pressure hydrogen is dangerous and expensive, but assuming you can do it, the gains would be proportional to how much hydrogen you can carry/inject. Most HHO systems amount to a tiny fraction of a percent.
Engineering Explained released a video on hydrogen combustion just a few days ago. IIRC, the conclusion he came to was that, for a very efficient V8, a 60L tank (think large street-side trash bin) filled to 5000PSI with hydrogen would be good for around 60 miles of hydrogen-only range. If you're going half and half with gasoline, you could double your fuel economy for the first 120 miles with a tank just about the size of the rear passenger compartment in most sedans.
With a much more efficient engine, say a Geo Metro 3 cylinder, you could get the same doubling of economy for around 500 miles per hydrogen fill.
|
Obviously the dynamics are a little different when you're working with pressurized gas, but overall, this is what makes me believe that on-the-fly HHO/H2 generation would be the way to go. Both of the engines that I have available for this project (Subaru FB25 and Honda D16) are relatively efficient four-cylinder designs, the Honda especially so. Further, the gain I'm looking for is nowhere near double efficiency... I'd be satisfied with a 5-10% increase since I'm getting the electricity and water for free.
I'll have a look at that video, thank you very much for the pointer.