A proton exchange membrane fuel cell power system

摘要

A power system housing (10) with an enclosure (11) is described wherein the enclosure defines a cavity (25). A subrack (30) mounted in the cavity supports a plurality of discrete proton exchange membrane fuel cell modules (100) in the cavity, and has forward (34) and rearward (35) edges, and top (35) and bottom (40) portions. An air distribution assembly (70) is received in the enclosure and coupled in fluid flowing relation relative to the top and bottom portions of the subrack. The subrack further includes an integral plenum (71), the plenum having an intake end (72) and an exhaust end (73). Coupled to the plenum are an air movement assembly (74) and an air mixing valve (80). The assembly moves the air from the intake end to the exhaust end of the plenum and the air mixing valve controls the amount of air which has passed through the respective fuel cells and which is recirculated back to each of the fuel cell modules. In addition to the air distribution assembly, a hydrogen distribution assembly is also disclosed.