Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Cars that run on water

  1. Aug 11, 2009 #1

    Wax

    User Avatar

    Last edited by a moderator: Sep 25, 2014
  2. jcsd
  3. Aug 11, 2009 #2
  4. Aug 11, 2009 #3

    Ivan Seeking

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    It is easy to run a car on water: You only need to separate the hydrogen out of the water [electrolysis] and then burn the hydrogen. The problem is that it takes more energy to get the hydrogen out than we get back from it - it is a net loss.

    Since this amounts to a perpetual motion claim, it is a closed topic.
    https://www.physicsforums.com/showthread.php?t=172340
    https://www.physicsforums.com/showthread.php?p=2269439#post2269439

    Hydrogen is a great energy carrier, but not an energy source. We have to make the stuff.
     
    Last edited by a moderator: Sep 25, 2014
  5. Aug 11, 2009 #4

    Ivan Seeking

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    There is some evidence that injecting hydrogen into a gasoline or diesel-powered engine [to aid combustion] can result in increased efficiencies that exceed the energy cost of producing the hydrogen, but that has yet to be demonstrated. It is often called hydrogen on demand.

    We have a member who has posted some good information here.
    https://www.physicsforums.com/showthread.php?t=304690
     
    Last edited: Aug 12, 2009
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Cars that run on water
  1. Cars (Replies: 15)

  2. Water car video (Replies: 2)

  3. Run Your Car On Water? (Replies: 9)

Loading...