What is the energy output when obtaining hydrogen from water using electrolysis?
jim h asked:
Let’s say one uses 100 kilowatt generating capacity to produce hydrogen from water using electrolysis, and runs the process for one hour. If he then turns around and uses the hydrogen to generate electricity, how much can he generate? Can he then produce 25 kilowatts for one hour? 50 kw? In other words, is the return from electrolysis 25%? Is it 50%? I am interested in the storage capacity from hydrogen produced with renewable energy. Thanks.
Let’s say one uses 100 kilowatt generating capacity to produce hydrogen from water using electrolysis, and runs the process for one hour. If he then turns around and uses the hydrogen to generate electricity, how much can he generate? Can he then produce 25 kilowatts for one hour? 50 kw? In other words, is the return from electrolysis 25%? Is it 50%? I am interested in the storage capacity from hydrogen produced with renewable energy. Thanks.
Tags: Electricity, Energy Output, Energy Water, Hydrogen Electrolysis, Hydrogen From Water, Kilowatt, Kilowatts, Kw, Renewable Energy, Storage Capacity, Water Electrolysis
August 29th, 2008 at 4:21 pm
Depends how you get your energy from hydrogen. Lets say you burn it to generate heat to make steam to drive a turbine. That’s a lot of steps. Lots of places for inefficiency. Probably 25% is a reasonable figure.
Might be 60% with a fuel cell?