A preheating heat exchanger for a fuel cell

Details A preheating heat exchanger for a fuel cell A preheating heat exchanger for a fuel cell

F - Mech Eng,Light,Heat,Weapons

28

D

F28D 7/10 (2006.01) F28D 7/14 (2006.01) H01M 8/04 (2006.01) H01M 8/12 (2006.01)

Patent

CA 2639835

The invention relates to a heat exchanger (110) for a hot fuel cell (101). The heat exchanger includes a first flow circuit (111) for receiving a cool air stream (113) and a second flow circuit (112) for receiving a hot fluid (114) coming from the cell, the first and second flow circuits having common surfaces for heat exchange. In accordance with the present invention, each of the first and second flow circuits (111, 112) comprises a plurality of concentric annular ducts (1110-1115; 1120- 1123) that are interconnected. The two walls of each duct are mechanically decoupled from each other, thereby enabling them to expand independently of one another and avoiding mechanical stresses within the heat exchanger.

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