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Thread: hydrogen fuel

  1. 30th August 2011, 11:06 AM #91
    Freightdog
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    am I correct in thinking that an internal combustion engine will be most efficient when exhaust gas temperature is lower
    Lower exhaust gas temperatures can be a result from a more effecient engine, however the act of lowering exhaust gas temperatures will not necessarily make a more effecient engine.

    As a mixture is leaned, power and EGT increase up to a point and then decrease.
    Max power is approx 50C below and richer than peak EGT
    Max economy is approx 25C below and leaner than peak EGT

    So low exhaust temps can also be created by a less effecient rich mixture

    Lean mixtures and high power settings lead to detonation
    Advancing the timing and high octane fuels will conteract detonation
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  2. 30th August 2011, 09:12 PM #92
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    Quote Originally Posted by isuzurover View Post
    It depends if you are talking petrol or diesel... Since petrol engines are the ones which can readily combust hydrogen:

    Optimum efficiency actually occurs leaner than stoichiometric. This actually means the EGTs will be higher. However, if you lean an engine out too much the EGTs can be harmful/damaging, plus you will get very high NOx levels (but low CO and unburnt HC levels).

    Water/steam injection can potentially reduce EGTs, therefore minimising NOX and also preserving the engine. Hopwever there are other flame speed/detonation issues to consider.

    The holden Ecotec V6 engines (if you remember those?) were set up to burn leaner than the previous V6, thereby saving fuel.
    Yes I did have petrol in mind. My question is in regard to how water injection may scavenge waste combustion heat and turn it in steam to push the pistons perhaps or not???
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  3. 10th March 2012, 09:03 AM #93
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    Hey folks, I don't know if this one has been on here before but it's a doozy.

    HHO DRY CELL Gen-10.2 HYDROGEN GENERATOR 4 CARS n TRUCK | eBay

    It even has science behind it apparently.

    Dr Isuzu Rover, would you like to decipher and tell us your thoughts and maybe contact some of his references as they are in WA apparently.

    I was directed to it via another forum.

    By all accounts, If I didn't know better you would think it was real.

    Cheers casper
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  4. 10th March 2012, 10:08 AM #94
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    Quote Originally Posted by Casper View Post
    Hey folks, I don't know if this one has been on here before but it's a doozy.

    HHO DRY CELL Gen-10.2 HYDROGEN GENERATOR 4 CARS n TRUCK | eBay

    It even has science behind it apparently.

    Dr Isuzu Rover, would you like to decipher and tell us your thoughts and maybe contact some of his references as they are in WA apparently.

    I was directed to it via another forum.

    By all accounts, If I didn't know better you would think it was real.

    Cheers casper
    Surely you do know better...

    9. There is also a risk of Spontaneous Combustion!
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  5. 12th March 2012, 11:13 AM #95
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    isuzurover
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    Quote Originally Posted by Casper View Post
    Hey folks, I don't know if this one has been on here before but it's a doozy.

    HHO DRY CELL Gen-10.2 HYDROGEN GENERATOR 4 CARS n TRUCK | eBay

    It even has science behind it apparently.

    Dr Isuzu Rover, would you like to decipher and tell us your thoughts and maybe contact some of his references as they are in WA apparently.

    I was directed to it via another forum.

    By all accounts, If I didn't know better you would think it was real.

    Cheers casper
    How do you suggest I contact "Kelvin Rees, Perth WA"?

    How do we know they aren't friends/family?

    How do we know they haven't been confounded by the placebo effect?

    The guy claims to have patented his "invention". If someone wants to contact him and ask for the patent numbers, I am happy to pull up the patent documents...

    However, having a patent is nothing special. A Patent lawyer in Australia managed to patent the wheel.
    Wheel patented in Australia - 03 July 2001 - New Scientist
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  6. 12th March 2012, 03:36 PM #96
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    Casper
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    Quote Originally Posted by bee utey View Post
    Surely you do know better...
    Quote Originally Posted by isuzurover View Post
    How do you suggest I contact "Kelvin Rees, Perth WA"?

    How do we know they aren't friends/family?

    How do we know they haven't been confounded by the placebo effect?

    The guy claims to have patented his "invention". If someone wants to contact him and ask for the patent numbers, I am happy to pull up the patent documents...

    However, having a patent is nothing special. A Patent lawyer in Australia managed to patent the wheel.
    Wheel patented in Australia - 03 July 2001 - New Scientist
    Hahaha, yes I know better just saw it and thought I would show you guys.

    No probs Ben, I will give him a bell and act interested lol.

    The reason I said for you to contact them was only because I couldn't find out how to and that you are in WA lol

    Cheers
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  7. 14th March 2012, 12:18 AM #97
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    Thanks, guys, I've just read through 10 pages of hoo-ha for nothing.

    Heck, here I was thinking I could finally connect some gadget to my V8 110 and get 10km/L!!!

    I finally worked out that there IS a gadget that costs $2500, that will drop my fuel consumption...........


    it's called an ISUZU TURBO DIESEL ENGINE!
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