Heat exchanger for fuel cell

Details Heat exchanger for fuel cell Heat exchanger for fuel cell

2011-08-23

2011-08-23

Ford, John K (Department: 3784)

Chemistry: electrical current producing apparatus, product, and

Fuel cell, subcombination thereof, or method of making or...

Process or means for control of operation

C429S434000, C429S437000, C429S439000, C429S442000, C429S120000, C123S041200, C123S041210, C123S041270, C123S041500, C165S272000, C165S274000, C165S104270, C165S104320, C165S163000

Reexamination Certificate

active

08003271

ABSTRACT:
A heat exchanger that can mechanically automatically control a level of cooling water according to heat generation of the fuel cell. The heat exchanger includes a housing having a cooling water inlet and an outlet connected to a fuel cell stack, a moving plate which moves reciprocally in the housing and discharges cooling water filled in the housing to the stack when it moves in a one direction and when it receives a steam pressure from the stack it moves in an opposite direction, and an elastic member that applies a force to the moving plate in the one direction. The heat exchanger can automatically maintain the level of cooling water despite a difference in heat generated between a full and a partial load operation of the fuel cell obviating complicated electronics such as a thermo-sensor, a valve, or a controller. Also, under a partial load, the exposure of flow channels to superheated steam is avoided, thereby extending the lifetime of the fuel cell.

REFERENCES:
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patent: 6053132 (2000-04-01), Evans
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patent: 2074395 (1991-04-01), None
patent: 2148225 (1993-12-01), None
patent: WO 2005008819 (2005-01-01), None
Certificate of Patent No. ZL 200610153702 issued in the corresponding Chinese application on Oct. 7, 2009 (including the Chinese application CN 100547839C).

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