Abstract
Recently, a lot of media says that the bright hydrogen systems as a future energy resources for our society. However, in fact, there are many of difficulties and bleak problems lay on the system from view point of energy saving and environmental protection. At the first part of this paper discusses various methods of hydrogen production and supply system for fuel cells of the vehicle driving. The next are about a design works which propose a method of combined power system of membrane type fuel cell and internal combustion engine for vehicle using methanol and di-methylether as a fuel respectively. Then paper shows a design example of small size of fuel cell system for a domestic co-generation using natural gas. At the final part is problems to be solved in the future and conclusion.
