Nozzle pump for recirculating hydrogen in a fuel cell

Abstract

The invention relates to a nozzle pump for recirculating hydrogen in a fuel cell, comprising an inlet for receiving hydrogen from a hydrogen tank, an electrically controlled valve arranged downstream of the inlet and designed to determine the quantity of inflowing hydrogen, a hydrogen storage reservoir arranged downstream of the electrically controlled valve and designed to hold a specific quantity of hydrogen, a Venturi nozzle arranged downstream of the hydrogen storage reservoir and having an adjusting element designed to adjust an effective flow area at a constriction of the Venturi nozzle, a secondary inlet arranged downstream of the constriction of the Venturi nozzle and fluidically connected to it and designed to draw in excess hydrogen from a fuel cell, and a mixing section.which is arranged downstream of a connection between the secondary inlet and the constriction of the Venturi nozzle and is designed to mix the flow originating from the constriction of the Venturi nozzle with the flow originating from the secondary inlet, and an outlet for delivering hydrogen to a fuel cell, which is arranged downstream of the mixing section.

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