Quote:
Originally Posted by mort
Consider a car that has an engine that can produce 250 HP and is 25% efficient there , but only needs 15 HP (6% of its maximum) to cruise at 55 MPH but is only 10% efficient at that power. It will get about 18 MPG at 55. If the efficiency at 15 HP could be raised from 10% to 20% then the fuel economy goes up to 36 MPG. If the hydrogen generator needs less than about 5 HP you are ahead. You might need to carry a lot of water.
-mort
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First off, a car that has an engine that produces 250 peek horse power is doing so at the top of it's revs, not the most efficient speed for it to be running at, at those speeds is where you will often find it to be 10% efficient or less, it is more common for a gasoline engine to be tuned for peek efficiency to be around 2,000 to 3,500rpm and depending on the engine might only be putting out 35hp to 50hp (if it's the 250hp example), now you want to put a 5hp electrical load on that engine? over 300 amps on the alternator, an alternator that has a peek output of 100-120 amps, so you put a 300 amp alternator on and that alternator puts closer to a 9hp load on the engine, based off what a gasoline generator takes to put out 300amps at 12 volts continually.
Why are we still talking about this again? if you are someone who really thinks this can work then go ahead and try it, but if you put a device like a vehicle that also has a scanguage on that tells you real time mpg, you will see your mileage go up when you turn the hydrogen device off, it's just that simple!