The invention relates to an engine
system for a fuel
cell, which is a fuel circulation method for the fuel
cell and a special device. The high-pressure fuel
hydrogen gas from a
hydrogen gas source passes a pressure reducing valve to reduce the pressure, enters into a
hydrogen gas
sprayer, the hydrogen gas from the
sprayer goes into a fuel
cell, after reaction with the fuel cell, the over-
dose hydrogen gas and water generation from the reaction enter into a water separator together, the hydrogen gas from the water separator gas outlet goes into an
air blower inlet, and the hydrogen gas pressurized by the
air blower enters into the
sprayer gas induction inlet. The sprayer design point is the pressure and flow rate of the consumed hydrogen gas at the fuel cell nominal power, the
air blower can regulate the speed, through the regulating the air blower rotary speed, the fuel hydrogen gas can maintain approximately constant circulation ratio within the scope of the fuel cell full power. The invention meets the requirements of the fuel cell to hydrogen gas circulation with relatively little
energy consumption, which can carry the water of the product out of the cell, can sufficiently utilize the fuel hydrogen gas, and the fuel can be more uniformly distributed at each
single section of the cell, thereby further improving the fuel cell life.