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Old 07-18-2009, 03:51 AM   #122 (permalink)
U-235
E=mr2
 
Join Date: Jun 2007
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Quote:
Originally Posted by seanfromnh View Post
Ya with my lawn mower It wasn't a self-contained unit (what i meant by "not complete" ) It was running off the electricity provided by my cavaliers battery and ran my little mower ( little two-horse i had sittin around... doesn't cut much grass as you can imagine so i figured id play with it...) Like i said it didn't run for a long time but it did run on just the HHO... I was under the impression that id easily be able to just attach an alternator and battery to the mower shaft and get the same result... But Im not sure if (like you mentioned earlier) the mower would turn the alternator efficiently?
Well, my concern would be whether or not the alternator connected to the mower engine would be able to charge it quick enough.


Quote:
Originally Posted by seanfromnh View Post
More questions... lol

i was wondering if anyone knew exactly how much hydrogen is produced from a mililiter of water (or gallon/ liter etc..) and i was wondering if anyone knew how much energy (btu-wise) was in that said amount of hydrogen...
I couldn't find the figures anywhere, so I'm doing math. Dammit.

According to wiki, hydrogen puts off 143 MJ/kg of energy when combined with oxygen but per volume only puts out 0.01079 MJ/l. Since I'm guessing you'll be measuring your quantity by volume, that's the figure I'd use to calculate. All volumes are given at STP.


0.01079 MJ/l = 0.00001079 MJ/ml.

1 MJ = 947.81712 BTU.

So 1 ml of hydrogen will put out 0.0102269467248 BTU.

Water is about 18g per mole by mass and is approximately 1/9th hydrogen (~16g oxygen, ~2g hydrogen). Using the Mole to volume conversion (1 mol = 22.4l), we can say that 18g of water will produce ~2.48889 litres, or 2488.9 ml. But 1 ml of water is only 1g, so using the same conversion factor we should get 0.138271605 litres, or ~138.27 ml of hydrogen.

So in 1 ml of water, you have enough hydrogen to produce ~1.41409634 BTU.

Unless my math is wrong.
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