HYDROGEN RECYCLING SYSTEM FOR FUELCELL

摘要

PURPOSE: A hydrogen recirculation system of fuel cell is provided to enhance energy efficiency by preheating 'hydrogen supplied to the ejector' using 'waste heat ejected from the stack of cooling water over than 60 °C' and prevent moisture from being congealed in the stack. CONSTITUTION: A hydrogen recirculation system of fuel cell comprises a hydrogen tank(10) accepting hydrogen; a regulator (20) which controls pressure of hydrogen ejected from the hydrogen tank; an ejector (30) which mixes 'hydrogen ejected from the stack' and ' hydrogen provided from the regulator' and sprays to the stack; and a first heat exchanger (42) which preheats 'hydrogen supplied from the hydrogen tank to regulator' using 'cooling water ejected in stack' and a second heat exchanger which preheats hydrogen supplied from the hydrogen tank to regulator' using 'cooling water ejected in stack'.