... Selected Fuel Cells for Cogeneration CHP Processes 37
3.1 Introduction 37
3.2 FuelCell Classification 37
3.2.1 The Proton Exchange Membrane FuelCell 38
3.2.2 Direct Methanol Fuel Cells 43 ... response of a fuel cell. Figure 2.2 displays
the ideal and actual responses of a fuel cell. Electrical energy is obtained from a
fuel cell when a current is drawn, but the actual cell potential ... 20
1.5 CogenerationFuel Cells – Sorption Air Conditioning Systems 22
1.5.1 Trigeneration 22
1.5.2 Fuel Cells in the Trigeneration Process 23
References 24
2 Thermodynamics of Fuel Cells 25...
... kinetics at the fuelcell electrodes.
The fuelcell system
The fuelcell system can be simply structured into the following components: a fuel
processor, an air system, a fuelcell stack and a ... new
generation of fuel cells. These work principally as batteries do, yet while batteries can be
considered as batch reactors, fuel cells are continuous reactors. In a fuel cell- powered
engine, ... the fuelcell where hydrogen is consumed.
However, to avoid build up of by-products from the processor, and to optimize the
operation of the cell, a surplus of fuel is usually fed to the cell. ...
... electrolyte
used in the cells and includes 1) polymer electrolyte fuelcell (PEFC), 2) alkaline fuelcell (AFC),
3) phosphoric acid fuelcell (PAFC), 4) molten carbonate fuelcell (MCFC), 5) intermediate ... electrolyte fuel cells, molten carbonate
fuel cells, and solid oxide fuel cells have been demonstrated at commercial size in power plants.
The previously demonstrated phosphoric acid fuel cells have ...
of fuel that can be used in a fuel cell. The low-temperature fuel cells with aqueous electrolytes are,
in most practical applications, restricted to hydrogen as a fuel. In high-temperature fuel...