ANALYSIS OF ENERGY AND WATER MANAGEMENT IN TERMS OF FUEL-CELL ELECTRICITY-GENERATION

Hydrogen-powered low-temperature fuel cells (PEFCs) are the energy con version units in vehicles with methanol as the energy carrier and a po wer train consisting of the following main units: methanol reformer (H -2 production) including catalytic converter, gas treatment, PEFC with peripheral units, electric motor with electric controllers and gearbo x. The process engineering analysis is based on a simulation model and describes the energy and water management as a function of different assumptions as well as operating and ambient conditions for net electr icity generation in a PEFC-powered power train. In particular, it pres ents an approach for balancing both water recovery (PEFC) and the use of water for the methanol reforming process as well as for the humidif ication of the PEFC. The overall balances present an optimised energy management including peripheral air compression for the PEFC. (C) 1998 Elsevier Science S.A.