Abstract: A one-piece separator plate suitable for use in a fuel cell stack comprising a single pressed metal plate having a peripheral raised seal region on a face of said pressed metal plate and a corresponding peripheral recessed seal region on the opposite face thereof, the corresponding peripheral recessed seal region forming a peripheral channel on said opposite face of the pressed metal plate. A peripheral insert ring is disposed in the peripheral channel, which insert ring and said peripheral raised seal region form seals between the faces of the pressed metal plate and an adjacent active cell component.

Abstract: An improved process and apparatus for absorption cooling in which an absorbent-refrigerant solution from an absorber is heated in a generator producing absorbent-refrigerant vapor, the absorbent-refrigerant vapor is separated and condensed producing pure liquid refrigerant and an absorbent-enriched solution, the absorbent-enriched solution is returned to the absorber, the pure liquid refrigerant is evaporated producing pure refrigerant vapor, and the pure refrigerant vapor is absorbed into the absorbent-enriched solution. A dilute absorbent-refrigerant solution and a concentrated absorbent-refrigerant solution are generated simultaneously in a solution concentration means disposed between the absorber and generator. The dilute absorbent-refrigerant solution is heated to produce a first pure refrigerant vapor and the absorbent-enriched solution. The first pure refrigerant vapor is condensed in the generator in thermal contact with the absorbent-enriched solution producing pure liquid refrigerant.