a hydrogen gas fueled triple engine

Discussion in 'DIY Marinizing' started by Vallen, Jan 23, 2016.

  1. Vallen
    Joined: Jan 2016
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    Vallen Junior Member

    OK so although I only made pattle boats.

    I have made homemade models jets turbine/props and lost more than 5.

    I was thinking of putting a bigger version on a totally home made boat it basicly a low powers rocket with fan blades and spinning props. Could this work on a boat setting ob the fuel is made from sea water a car battery

    I recently read of cars that do similar with portable water but I've done a semi sucessesful test in with a 24v car battery. It provided a decent amount of hydrogen gas was made but broke down due to salt build up I was thinking that if I could filter out some of the waters solvents I think this could be self sastaining if I can solve the build up problem

    I use a homebult vertical wind genarator to charge the batteries that I could put on the boat
     
  2. rwatson
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    rwatson Senior Member

    um, getting the gas is one thing, making it work in a jet or rocket engine is another.Making hydrogen from electrolysis is a very slow, inefficient way of getting hydrogen.Its cheaper to buy a tank of it from commercial sources.

    I have to assume you want hydrogen for jet performance, not efficiency.

    Your boat will go further ( not faster) by running on the solar power alone.
     
  3. Vallen
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    Vallen Junior Member

    Well I already know how to make it but still i would need to make it bigger and i Don't know by how much oh and as to your question about the effectiveness of the hydrogen is good but not great in terms of a jet fuel
    I use electro magnetic electrolysis which is better but harder to maintain. I might add that I can run another electric motor
    On 8 gallons of tap water will run my 3 foot long rc Delta wing full metal for about 3 minets flight time.

    I get about 1/4 gallon hydrogen for ever gallon of tap water. in my semi sucessful test i only got 1/5 a gallon before failure at which point the gallon of sea water was close to gone
    Ill need to now how much power in pounds of trust I would need to move a 75 foot boat at a safe pace and how to prevent the salt build up within the electrolysis chamber
     
  4. Mr Efficiency
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    Mr Efficiency Senior Member

    Hydrogen is a rocket fuel. That it is not in common use for more sedate transportation is out of respect for its explosive potential, though it certainly has the pollution angle all parceled up. I'd be cautious.
     
  5. Vallen
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    Vallen Junior Member

    Well this sestem will have multiple safety level i dont want to get hurt and i have a engineering masters degree so i do know what im doing and ive solved the build up problem by using a water filter i have slowed the build up on the cpper coils to a managable amount. I ran the system for 12 hour before it needed cleaning if I filter the water more it just might run longer
     
  6. gonzo
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    gonzo Senior Member

    You should put what you learned in school to practice. A wind generator will create more drag and use more fuel than if you run an alternator from the turbine. You should also know that mechanical systems don't scale up or down linearly. These are basic physical laws. You have another post about a giant trimaran where the same basic questions are posted. A turbine powered boat that needs to be stopped and cleaned every 12 hours, would only make sense in a high performance application. Otherwise, it should run for at least several days without problem. If you are using hydrogen by separating water, the system is very inefficient; particularly with such a low energy fuel. Go back and re-read you engineering books. It is all there, including how much energy you can recover from wind.
     
  7. Vallen
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    Vallen Junior Member

    That why im consultin you guy a yes im already getting power fom the turbine but due to the fact that making energy this way wont support it self due to a engineering law(s) it just needs a little boost from the wind and solar genators can be use full the electrolysis chamber is smallabout 3foot cube including the filter and i could havesix aboard the boat so that it only needs cleaning once a day i should of mentioned that it just seems like that these things would be auto mattic
    I want to say sorry that i didnt include every thing i should of.
     
  8. gonzo
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    gonzo Senior Member

    Check your grammar. Run-on sentences make little sense, so it is hard to give you relevant advice. Take the time to write clearly. When you do engineering reports, clarity, relevance and conciseness are crucial.
     
  9. Stephen Ditmore
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    Stephen Ditmore Senior Member

    Are we talking about an electrolyzer like this one?
    http://www.reuters.com/article/idUSnCCN3cx3ZP 1c3 MKW20160111
    The numbers I've seen for previous generation electrolyzers suggest that you're getting about 1/8th the power out that you put into it, so I'm inclined to agree with rwatson about its inefficiency. On the other hand, if it's constantly making fuel as it sits at the dock, powered by solar & wind...
     
  10. W9GFO
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    W9GFO Senior Member

    A gallon? Is that in gaseous form or liquid? If liquid, where is the energy coming from to cool it? If gas, then that is not much - very inefficient, still needs energy to compress it.
     

  11. Stephen Ditmore
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    Stephen Ditmore Senior Member

    I need you to turn that into energy units. I don't care how much water you put into it, I care how much energy is required. How many Watts are you putting in, how many Watts are you getting out? In between, how are you converting Watts to BTUs to stored BTUs (or calories - some measure of latent heat energy), then back to Watts? Note that if you need to compress the hydrogen to store it in pressure tanks, that will also take energy input.
     
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