6 - Fuel cells

Abstract

In this chapter, fuel cell system fundamentals, fuel cell thermodynamics and electrochemical processes, and a comparative summary of the major types of fuel cells have been introduced first. Fuel cell modeling and equivalent circuit models are then briefly discussed. Fuel cell distributed power generation systems are presented for both grid-connected and standalone applications. A discussion on hydrogen generation and environmental impact is given, followed by the principles of operation of electrolyzers. The challenges in developing fuel cell systems are also highlighted for future research needs. Finally, since almost all viable types of fuel cells use hydrogen as fuel, the last part of this chapter covers the hydrogen economy, and a need for a fuel-cell-powered society.