Wednesday, November 15, 2006

Microcombustion Hydrogen Engines

Note also that hydrogen fuel is more powerful combustant than gasoline fuel. A gallon of ~91 octane gasoline, atomized into a piston, will produce 125,000 BTU/h, and diesel produces 147,000 BTU/h, and a pound of hydrogen burns 61,000 btu/h. Hydrogen burns at 325 btu/h per cubic foot [30cc^3 = 2700cc = 2.7 liters]. However, there are 10 H2 molecules per cc at sea level kPa. Hydrogen will burn at 4% oxygenation.

1 horsepower is 2540 btu/h.

Inside a 49cc engine [4-stroke] running at 2000rpm, this becomes 49,000 cc of hydrogen/m, x 4% = 1960 cc of hydrogen. x 60 minutes = 46hp, uncompressed 4% hydrogen. This concentration level could potentially be increased dramatically. Also, the rpm level could increase to perhaps 4000rpm. At 4000 rpm the same equation would produce up to 161 hp from a 49cc engine space. Double the concentration of hydrogen to 8% [4% is the lowest] and this will double the figure to 322hp, with losses from less perfect combustion and higher volume. But a 49cc engine is no slouch when run with hydrogen. That will run a serious car quite well.

The trick is the percentage ratio between gasoline combustion strength and hydrogen combustion strength. I might estimate freehand that hydrogen is 5X as powerful as gasoline. They are, however, liquid vs gas, so the method becomes a critical ratio fulcrum.

Unfortunately, two-stroke engines are far more polluting than any automobile. It is important to reject the two-stroke engine.

I would like to see a 4-stroke 4-piston microcombustion engine running a moped. Many mopeds only generate something around 3 bhp. Plane engines have X-designed piston setups to minimize vibration and wear that a non-V16 engine could only dream of. This engine would be tiny. It could have pistons each ~10cc in size, and because of the safer redline, could likely operate up to 5000RPM or higher. Many motorcycle engines redline at 14,000RPM. Using hydrogen gas as fuel, and producing 2500R X40CC /M, we would find ourselves running through 100,000cc of hydrogen a minute and 6,000,000 CC of hydrogen per hour.

Hydrogen burns at 325 btu/h per 2700cc. 60,000CC / 27CC = 2222 X 325 btu. 722,222 btu/h would come from this engine. /2540 btu/h per Hp. That would show up as 284BHp, from a 40CC engine@5000RPM. Application: 40cc is 0.04 liters. How many ounces is this? 3.63- liters = 1 gallon. 1 gallon = 128 ounces. 3.63 liters / 128 ounces = 0.028 liters per ounce. This engine, which would be about one and a half ounces, would produce 284Hp. I could put that on roller skates.

I would attach it to a multitronic transmission and that to the wheel[s]. If I only needed 28.4Hp, I could reduce the engine size to 4CC, smaller than your average immunological injection. Hydrogen will produce 7.1Hp per CC at 5000RPM. It produces 1.42Hp per CC at 1000RPM.


Blogger William Bunker said...

I speculate that an X4 burning hydrogen at 10,000 rpm could produce fantastic Hp from a miniscule engine size. The 5000 rpm engine producing 7.1Hp/cc would be doubled to 14.2-~Hp/cc. A Honda civic could then run on a 9cc engine. That is 0.1 = 100cc, 0.01 = 10cc, 0.009 Liter engine.

The one-ton could probably do so using a 0.007 engine considering efficiencies and assist.

2:14 PM  

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