ABSTRACT
One of the most important challenges that our world will face in the twenty-rst century will be continuing to meet the ever-increasing energy needs of its citizens. Global concerns over energy sustainability and environmental impact of fossil fuels have motivated efforts to improve our energy sources. Therefore, a renewable longterm energy source and a more environment-friendly source are highly preferable. One of the promising candidates as a power source solution for the future world energy problem is fuel cells. Fuel cells are ideal candidates for distributed power generation. They can provide a low emission and highly efcient source for cogenerating heat and electricity.
