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Energy loss converting water to hydrogen then back to water

  1. Jun 12, 2007 #1
    i was doing a little thinking and have a pretty good idea but to see if it will even come close working i need to know how much energy loss is there converting water to hydrogen then back to water. using Electrolysis to split the water and a fuel cell to rejoin them back together. i know you cant get as much energy back as i put in just need to know the loss. in a percentage would work best.
     
  2. jcsd
  3. Jun 12, 2007 #2

    Danger

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    Welcome to PF, Mrwabba. The efficiency of both processes depends upon how your approach them. There are different ways of doing both.
     
  4. Jun 12, 2007 #3
    If you used low cost electictiy to make the hydogen and then produced electricity for a higher cost you come out in front where it counts in the wallet.

    Where I live night rate electicity is 8c/kWhr and day rate 22c/kWhr. If the efficency of the process was say 90% there is a way to make money. Each kilowatt hour of electricy would reep a nett return of 13c/kWhr.

    Is it posiable to build a hydogen generator, storage cylinder and fuel cell relativly cheeply - might be worth building one for home use.
     
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