Mid-sectional fuel distributor for fuel cells

Details Mid-sectional fuel distributor for fuel cells Mid-sectional fuel distributor for fuel cells

H - Electricity

01

M

H01M 8/04 (2006.01) H01M 8/10 (2006.01) H01M 8/24 (2006.01)

Patent

CA 2625458

In one embodiment the present comprises an air inlet 2, a series of fuel cells 6, a new fuel inlet 14, a fuel distributor 16, a recirculation plenum 19, and an exhaust 12. Fresh fuel from the fuel distributor 16 enters the fuel cell stack in a middle-third section of the fuel cell stack, and the fresh fuel is divided into an exhaust fuel 12 flow and a recirculation fuel flow 18. The exhaust fuel flow passes along a first portion of the series of fuel cells to the exhaust, and the recirculation fuel flow passes along a second portion of the series of fuel cells to the recirculation plenum and mixes with new fuel from the new fuel inlet in the fuel distributor. The recirculation plenum is located at an opposite end of the fuel cell stack from the exhaust, and the fuel-cell stack is of a seal-less design.

Dans un mode de réalisation, la présente invention comprend une admission d~air (2), une série de piles à combustible (6), une admission de nouveau combustible (14), un distributeur de combustible (16), un plénum de remise en circulation (19) et une évacuation (12). Du combustible frais à partir du distributeur de combustible (16) entre dans l~empilement de piles à combustible dans une partie du tiers médian dudit empilement et le combustible frais est divisé en un flux de combustible d~échappement (12) et un flux de combustible de remise en circulation (18). Le flux de combustible d~échappement passe le long d~une première partie de la série de piles à combustible vers l~évacuation et le flux de combustible de remise en circulation passe le long d~une seconde partie de ladite série vers le plénum de remise en circulation et se mélange au nouveau combustible provenant de l~admission de nouveau combustible dans le distributeur de combustible. Ledit plénum est situé à une extrémité opposée dudit empilement à partir de l~évacuation et ledit empilement est d~une conception sans joint.

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