Ok, so you were not joking.
What is it that you think you are going to build. You have been pretty sketchy. Likely why I thought you were joking.
My engineering background is in heat transfer and energy conversion.
I will start off by saying that on planet earth, hydrogen is an energy storage device, not an energy source. We have almost no natural sources of free element hydrogen. Hydrogen must be either liberated from water using large amounts of electric current, or it can be liberated from hydrocarbons, usually natural gas at high temperature and in the presence of water vapor. (this is called a steam methane reformer if you want to look up the tech. Its how almost all commercial quantities of hydrogen are produced today).
Both use FAR more energy input to do the hydrogen separation than is gained when the hydrogen is 'consumed' to produce power either in a combustion engine or in a fuel cell. As I said, hydrogen is an energy storage method. Like a battery. You use energy to produce the hydrogen, transport it somewhere else and let the hydrogen produce the energy you need at the new location.
You cannot get more energy out than you put in. Simple laws of physics. In fact, do to inefficiencies, you cannot even break even. Not even close in the case of hydrogen. This is also why hydrogen powered vehicles have never been produced in quantity. They work fine, but the hydrogen has to come from somewhere and it consumes more energy than you would have burning the gasoline in the first place. Much more energy lost. Hydrogen powered vehicles are VERY fuel wasteful. As in 1 to 2 MPG equivalent for a little Honda Civic. They will never make economic sense unless free sources of electric power are someday found. Don't hold your breath. Even then, conventional electric motors are far more efficient.
opcorn:
