Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Patent
1988-05-09
1989-04-25
Kalafut, Stephen J.
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
429 26, 429 34, H01M 804, H01M 200
Patent
active
048247405
ABSTRACT:
Fuel Cell stack coolant water is processed by moving the two-phase water/steam coolant exhaust through a steam separator wherein the water phase is separated from the steam phase. The water phase is then moved through a heat exchanger where its temperature is lowered to a subcooled level which is below the coolant operating temperature in the stack. A flow control valve is associated with the coolant heat exchanger to regulate water flow through and/or around the heat exchanger depending on the temperature of the water which leaves the steam separator. By subcooling the coolant before it reenters the stack, a lessening of electrolyte loss through evaporation is achieved. By eliminating steam condensation as a form of system heat rejection, system engineering is simplified and construction costs are lowered.
REFERENCES:
patent: 3539397 (1970-10-01), Keating et al.
patent: 4333992 (1982-06-01), Healy
patent: 4585708 (1986-04-01), Abens et al.
Abrams Martin L.
D'Aquila Daniel L.
Scheffler Glenn W.
International Fuel Cell Corporation
Jones William W.
Kalafut Stephen J.
Kochey Jr. Edward L.
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