Bassin, you make a valid point, if not for one glaring error.
The reaction is 2H20-(electrolisis-> 2H2 +O2.
The combustion reaction is
2H2 + O2 -> 2H2O + Energy, but not in a gas combustion engine.
Not even close actually.
Its H2 +13O2 +C8H18 (octane) -> 10H20 + 8CO2 thats in complete combustion, which isnt really possible in real world applications (same for regular gas, if it were attainable there'd be no such thing as an O2 sensor, as all the O2 would be burned up)
Reg. gas is
25O2 + 2C8H18 -> 18H2O +16CO2
Here's the thing that you obviously didn't understand in my last post, if you even read it. The electrical drain on the system is so low that the extra MECHANICAL energy gained from the combustion of H2 replacing the octane in the engine is negligible.
The thing from wiki, is a complete system using electricity to produce energy BACK into electrical energy. The power loss from changing electrical energy into mechanicla energy is probably 6-20%. But youre changing electrical energy into chemical which then is combusted (with the extra fuels O2 and octane) to create a bigger explosion.
Basically heres the jist of it. the wiki argument is this
Use electricity to produce H2 to be combusted with only O2 to create mechanical energy to create more electricity. The flaw with that is, THAT is a perpetual motion machine.
The goal being to create a perpetual motion machine basically.
In the backyardautoindustry, the goal is to replace gas with something that is *close* to being as efficient, when compared to gas prices. Were not trying to get 100mpg, were trying to reduce fuel costs. And after a year or so, the booster basically pays for itself with fuel efficiency if youre adding in (basically) free fuel in the form of H2 gas.
Next: "So you see, hydrogen is not a way to produce energy unless you start with a cost free source of hydrogen. The only feasible way to make your car more fuel efficient by burning hydrogen is to introduce the hydrogen from an outside source, like producing it from household current."
a free source? such as producing with a slight electrical charge imposed on the engine that its helping to run? where the cost is the drop in GAS economy, but raise in overall FUEL economy plus throw in a the price of a qt of distilled water every few months at $1 a gal?
Further more, gas isnt 100% efficient either, its around 96% efficient. And using a perfect combustion of 94% of Hydrogen, (by your efficiency numbers) hydrogen costs are WELL below a 2% drop. That is the main argument for us trying to attain basically a hybrid fuel engine.
From that wiki article: "Hydrogen is not an energy source,
[82] except in the hypothetical context of commercial
nuclear fusion power plants using
deuterium or
tritium, a technology presently far from development.
[83] Elemental hydrogen from solar, biological, or
electrical sources costs more in energy to make than is obtained by burning it. "
Did you happen to check out that footnote 82? Lemme drop some quotes from there:
- "The advantage is that [H2] stores approximately 2.6 times the energy per unit mass as gasoline, and the disadvantage is that [H2] needs about 4 times the volume for a given amount of energy. A 15 gallon automobile gasoline tank contains 90 pounds of gasoline. The corresponding hydrogen tank would be 60 gallons, but the hydrogen would weigh only 34 pounds."
- "[The production of hydrogen] requires all the energy you are going to get from burning the hydrogen and a bit more on account of inefficiencies.
Therefore, hydrogen is an energy transfer medium rather than a primary source of energy." (this is the thing a booster is used for... to transfer chemical combustion energy to mechanical)
-"Hydrogen has been proposed as both a storage and
transmission medium. It should work for these purposes. "
-"Hydrogen
can be used as a motor fuel, whereas neither nuclear nor solar energy can be used directly"
-"Hydrogen can be used as a fuel directly in an internal combustion engine
not much different from the engines used with gasoline. The problem is that while hydrogen supplies three times the energy per pound of gasoline it has only one tenth the density when the hydrogen is in a liquid form and very much less
when it is stored as a compressed gas. This means that hydrogen
fuel tanks must be large." (this problem is combatted by a fuel on deman system such as the booster produces)
-"Demonstrations of hydrogen powered vehicles have usually used compressed hydrogen gas. However, because of the low density, compressed hydrogen will not give a car as useful a range as gasoline." Again, this is combatted by a fuel on demand system rather than a fuel cell system.
-"Since the insulation [of a fuel cell] can't be perfect, the hydrogen will gradually evaporate, typically 1.7 percent per day. This is too fast for a car to sit for months between uses. A tank of compressed hydrogen holding enough to get to a hydrogen station would solve this. If the engine is flexible enough to burn gasoline as well as hydrogen, a half gallon gasoline tank would suffice."
-"[Hydrogen] is unlikely to be used as long as gasoline remains so cheap, i.e. as long as oil remains cheap and fear of global warming does not prevent its use." -"Although the hydrogen storage vessel is large, hydrogen burns 1.33 times more efficiently than gasoline in automobiles (
Bockris and Wass 1988)."
-"In tests a BMW 745h liquid-hydrogen test vehicle with a 75 kg tank and the energy equivalent of 40 liters of gasoline had a cruising range in traffic of 400 km, or a fuel efficiency of 10 km per liter (
Winter 1986)." This is equivalent to 23.5mpg, back in 1986.
-"At present, commercial hydrogen is more expensive than gasoline. Assuming $0.05 per kwh of electricity from a nuclear power plant during low demand, hydrogen would cost $0.09 per kwh (
Bockris and Wass 1988). This is the equivalent of $0.67 per liter of gasoline. Gasoline sells at the pump in the United States for about $0.30 per liter. However, estimates of the real cost of burning a liter of gasoline range from $1.06 to $1.32 when production, pollution, and other external costs are included (
Worldwatch Institute 1989). Therefore, based on these calculations hydrogen fuel may
eventually become competitive." I think that "eventually" is now.
*That* is the argument. The energy efficiency of basically free H2 is comparable to gasoline. Especially with gas at $4/gal
Finally, the cost they are talking about in H2 is to COMMERCIALLY produce it, as in, create it, store it, ship, tax it, add in pump costs and profits....
Also for future's reference, wikipedia, a site where anyone can edit information, is not a bastion of credible information.