Valvular conduit for fuel cell ejectors

A fuel cell ejector for a hydrogen recirculation system, the fuel cell ejector comprising:

• a primary flow nozzle coupled to a hydrogen storage tank;
• a secondary inlet coupled to an outlet of a proton exchange membrane fuel cell (PEMFC);
• a suction chamber coupled to the primary flow nozzle and the secondary inlet;
• and
• a valvular conduit manifold positioned between the secondary inlet and the outlet of the PEMFC, the valvular conduit manifold comprising at least one minor return loop and at least one major return loop shaped such that hydrogen flows preferentially across the secondary inlet in a first direction from the PEMFC to the suction chamber.

A method comprising:

• providing a fuel cell ejector for a hydrogen recirculation system, the fuel cell ejector comprising a valvular conduit manifold;
• coupling a primary flow nozzle of the fuel cell ejector to a hydrogen storage tank;
• coupling a secondary inlet of the fuel cell ejector to an outlet of a proton exchange membrane fuel cell (PEMFC);
• coupling a suction chamber to the primary flow nozzle and the secondary inlet;
• and
• positioning the valvular conduit manifold between the secondary inlet and the outlet of the PEMFC, the valvular conduit manifold comprising at least one minor return loop and at least one major return loop shaped such that hydrogen flows preferentially across the secondary inlet in a first direction from the PEMFC to the suction chamber.