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  #41 (permalink)  
Old 6th February, 2002, 09:01 AM
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Quote:
Originally posted by dimmreaper
Well hydrogen and oxygen are "boomy" because combustion is basically rapid and violent oxidization. A hydrogen powered internal combustion engine is nearly pollution free(nitrogen oxygen combustion byproducts would be the only pollutants), as two hydrogen molecules and one oxygen molecule become two water molecules when burnt.

Gasoline on the other hand is a simple hydro-carbonate that when combined with oxygen for combustion produces carbon-dioxide(and some carbon-monoxide, especially when improperly tuned) as well as water vapor and nitrogen oxygen byproducts.

Methanol and other alcohols are not all that dissimilar from gasoline hydro-carbonates, they just already have some oxygen atoms of there own, which is why less power is extracted from any volume of alcohol than from the same volume of gasoline. However the oxygen in alcohol makes it burn cooler, and also makes it more difficult to ignite, these attributes make it a very high octane fuel well suited for high static compression ratios and supercharging. The "intercooling" effect of alcohol evaporating in an engines intake manifold is another reason why it is the perfect fuel for supercharging applications.

Diesel fuel and Kerosene are hydro-carbonates just like Gasoline, though there molecules are larger and more complex(less refined), which is why they are lower octane fuels. Because these fuels are of such a low octane, they must be injected in to the combustion chamber of an engine at the very end of the compression stroke, to prevent predetonation.
Yup, couple years ago I attended a "Fuels and combustion" lecture which was basically them blowing stuff up, and every result we had showed hydrogen as the best and most reliable fuel

anyway.. what about mercury for cooling?
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  #42 (permalink)  
Old 6th February, 2002, 11:24 AM
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Quote:
You forgot water, ethanol, chlorine, LP gas, hydrogen (now thats a BOOM!!), helium, nitrogen, CO2 and just about every other liquid and gas. Some are better suited than others, but just about any could be used(though it may not be cost effective, efficient, or even safe). As I'm sure you know, one just has to set the system pressure so that the boiling point is optimal . . . .
I ignored those because the conditions required are just too extreme for somebody to knock up in their garage. The ones I listed basically give the right sort of temperatures at pressures just either side of ambient.

Otherwise, why not use bitumen at extremely low pressure?

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anyway.. what about mercury for cooling?
Mad as a hatter? You will be
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  #43 (permalink)  
Old 6th February, 2002, 06:42 PM
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who says i'm not already

*fires up his mercury "cooler"*

*dies*
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  #44 (permalink)  
Old 6th February, 2002, 08:09 PM
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I say go for it!! some one has to
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  #45 (permalink)  
Old 7th February, 2002, 09:11 PM
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If your in Uk and need phase charge system filled up call the auto man ,he's the man that can!
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  #46 (permalink)  
Old 8th February, 2002, 12:38 AM
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auto man?
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  #47 (permalink)  
Old 13th February, 2002, 08:22 PM
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Yes auto guy .If you get a leak in your car air conditioning system you can call up an enginner who comes round ,brazes in an adapter and refills the system!simple!
check the yellow pages.thats where i got mine from.
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  #48 (permalink)  
Old 13th February, 2002, 08:25 PM
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Quote:
Originally posted by fasterstill
Yes auto guy .If you get a leak in your car air conditioning system you can call up an enginner who comes round ,brazes in an adapter and refills the system!simple!
check the yellow pages.thats where i got mine from.
Err, he'll have to evacuate the refrigerant, repair the line (if possible), vacuum it, then refill it.
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  #49 (permalink)  
Old 13th February, 2002, 08:32 PM
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refrigerant was already lost as i had a leak!(split line)
he repaired the line by brazing in the adapter .
Did'nt see how or weather he vacumed it .
Then he filled it.
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  #50 (permalink)  
Old 13th February, 2002, 08:36 PM
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He did, otherwise it would'nt work. Vacuuming the line removes all moisture and contaminants.
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  #51 (permalink)  
Old 13th February, 2002, 08:41 PM
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sounds sensible did'nt take anougth notice .
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