Passive cooling system for fuel cell stack

Details Passive cooling system for fuel cell stack Passive cooling system for fuel cell stack

2007-04-26

2011-10-11

Michener, Jennifer (Department: 1728)

Chemistry: electrical current producing apparatus, product, and

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

Process or means for control of operation

C429S439000

Reexamination Certificate

active

08034501

ABSTRACT:
A passive cooling system for a fuel cell stack is provided. The passive cooling system includes a plurality of cooling plates, each installed between every few unit cells, each having flow channels for flowing a primary coolant on at least one surface, and each comprising an inlet hole through which the primary coolant enters and an outlet hole through which the primary coolant that has passed the flow channels leaves; and a heat exchanger installed on a primary coolant flow line connected from the outlet holes to the inlet holes of the cooling plates to change a vapor state primary coolant to a liquid state primary coolant by cooling the primary coolant, wherein a path through which the primary coolant passes is a closed circuit, and the flow of the primary coolant is achieved by natural convection caused by vaporization of the primary coolant.

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Office Action issued in Korean Application No. 2006-81841 on Jun. 19, 2007.

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