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Thread: hydrogen car

  1. #1 hydrogen car 
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    Does anyone have any sites or write ups that could tell me how to make a model car run off of electrolysis. I want to do an extra credit project for school. I was thinking of using knex to make a car and some how using electrolysis to make it move.


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  3. #2  
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    You're gonna have trouble using electrolysis to run the car since electrolysis consumes energy, but doesn't produce it. What you want is something called a fuel cell. I don't know if you've ever heard of them. The problem is these are very hard to make (and expensive, considering the price of platinum). I have some links you might want to check out (I did a project on this last year).

    http://www.ballard.com/be_informed/f...chnology_works

    http://en.wikipedia.org/wiki/Fuel_cells

    You hope might lie in the fact that you can buy a model fuel cell car from Thames&Kosmos.

    http://www.thamesandkosmos.com/products/fc/fc2.html


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  4. #3  
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    You'd be better off running your model car off batteries than using electroylsis. If your car has to run off hydrogen then build a fuel cell. There are less expensive metals than platinum that will react with water to liberate hydrogen Handling and disposing of the metal oxide waste is going to be a pain and in some cases dangerous.
    Man casts a long shadow only at morning and sunset. He stands in his own shadow at the height of his noon.
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  5. #4  
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    I agree with Permafrost that you would be much better off trying to get a car to run on an electric motor. It's challenging enough. Building a hydrogen powered car would be 100 times more difficult.
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  6. #5  
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    I think the most promising form of this kind of power source is fuel cells, rather than electrolysis-based system.

    Of course, battery-fule cell hybrid is the most promising.

    I am talking about what is goining on in the automotative industry.
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  7. #6  
    Forum Freshman Dantak's Avatar
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    Don't use electrolysis use batteries or a fuel cell. Oh wait everyone ALREADY said that! Whollly crap!!! How many people does it take to say the same thing?!?! Was this post a poll?
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  8. #7  
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    Well I would like to take credit for posting the original answer. Everyone then repeated roughly what I said.
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  9. #8  
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    Actually the process isn't that complicated if you can get hold of the electronics. By pulsing electrical current through water in electrolysis-type setup you can create a lot of hydrogen gas. this can be used to power an internal combustion engine and recharge the battery. (I know it sounds like a breach of Newtons 2nd law of thermodynamics but this does work and the explanation is still under much discussion).

    Here is a link to a nice plan for the fuel cell:

    http://www.netmar.com/~maat/archive/...rplans_doc.htm
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  10. #9  
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    Quote Originally Posted by g07g6008
    I know it sounds like a breach of Newtons 2nd law of thermodynamics but this does work and the explanation is still under much discussion.
    It doesn't violate the 2nd law of thermodynamics because all the energy comes from your battery (or wall outlet, or whatever) that provided the energy for the electrolysis. Since you will never get any more energy out of burning the hydrogen than you spent on the electrolysis, there is no violation. Of course, that also means that it would be a lot more efficient to just power the car from the battery directly.
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  11. #10  
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    But in the setup, the battery is recharged by the alternator so there IS excess energy!
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  12. #11  
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    Quote Originally Posted by g07g6008
    But in the setup, the battery is recharged by the alternator so there IS excess energy!
    No, there is no excess energy. If you are using some of the energy from the hydrogen to power the car, you won't be able to fully recharge the battery. This sort of thing simply doesn't work. If it did, everyone would be useing it for unlimited free energy.
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  13. #12  
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    But I have spoken to someone who is currently running his motorbike completely off water. Never has to recharge the battery.
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  14. #13  
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    Quote Originally Posted by g07g6008
    But I have spoken to someone who is currently running his motorbike completely off water. Never has to recharge the battery.
    He is lying. Or, if he is telling the truth, he should take the bike to a university physics department. He'll be sure to win the Nobel Prize.
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