NOVELTY - The system (1) has a hydrogen storage and delivery subsystem (3) and a nitrogen storage and delivery sub system (10) which are interfaced with an electronic control unit (2) to store and supply hydrogen and nitrogen to a fuel cell stack (4) through the corresponding solenoid valves (9a,9b) and a humidification system (7). A hydrogen purging and diffusing system (8) is provided in between the fuel cell stack and a hydrogen recirculation blower (5). The hydrogen purging and diffusing system is provided to facilitate the removal of condensed water and other impurities from fuel cell stack.    USE - Hydrogen recirculation and bleeding system for polymer electrolyte fuel cell of vehicle (claimed).    ADVANTAGE - The hydrogen purging and diffusing system is provided in between the fuel cell stack and hydrogen recirculation blower, thus the condensed water and other accumulated impurities are easily purged out from the fuel cell stack. The recirculation of hydrogen and draining of impurities are monitored automatically by opening solenoid valves through electronic control unit of vehicle, thus the hydrogen is supplied to the fuel cell stack at correct temperature, pressure and humidity. The excess hydrogen is recirculated from fuel cell stack through humidification system using hydrogen recirculation blower, thus the efficiency of hydrogen is improved.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) method of recirculating hydrogen and bleeding of impurities in hydrogen subsystem of polymer electrolyte fuel cell of vehicle; and    (2) vehicle.    DESCRIPTION OF DRAWING(S) - The drawing shows the block diagram of the hydrogen recirculation and bleeding system.    Hydrogen recirculation and bleeding system (1)    Electronic control unit (2)    Hydrogen storage and delivery subsystem (3)    Fuel cell stack (4)    Hydrogen recirculation blower (5)    Humidification system (7)    Hydrogen purging and diffusing system (8)    Solenoid valves (9a,9b)    Nitrogen storage and delivery sub system (10)