H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 8/04 (2006.01) F28C 3/08 (2006.01) F28D 5/02 (2006.01) H01M 8/24 (2006.01) H05K 7/20 (2006.01)
Patent
CA 2424172
A cooling system is connected to a fuel cell stack which has a hydrogen inlet, an air inlet, a coolant inlet, a coolant outlet and an exhaust water outlet. The cooling system includes a heat exchange unit coupled to the coolant inlet and the coolant outlet, a coolant pump for circulating coolant therethrough, and a blower for blowing air through the heat exchange unit. The cooling system also includes an evaporator unit exposed to the blown air, and a conduit which communicates exhaust water from the fuel cell stack exhaust water outlet to the evaporator unit. The exhaust water evaporates in the blown air and thereby cools the air and reduces the amount of liquid exhaust water. In one embodiment, the evaporator unit is a wick mounted on an exterior surface of the heat exchange unit. As the exhaust water evaporates it increases the cooling performance of the heat exchange unit. In another embodiment, the evaporator unit includes a set of water injectors which spray exhaust water into the air as it is blown towards the heat exchange unit. The injectors are mounted on an annular member located in a housing between a blower and a radiator. A removable porous evaporator element is mounted in the housing between the water injectors and the radiator.
Finamore Peter
Vuk Carl Thomas
Borden Ladner Gervais Llp
Deere & Company
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