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  • Title(Kor)
    SOEC에 과열기의 고온 스팀을 공급하는 Interface의 열전달에 관한 전산해석
  • Title(Eng)
    A CFD Analysis on Heat Transfer of High Temperature Steam through Interface with Superheater and SOEC for Hydrogen Production
  • Keyword
    SRF(고형연료), Superheater(과열기), SOEC(고체산화물수전해전지), CFD(전산유체해석), Hydrogen(수소)
  • Author(Kor)
    변현승1⋅한단비1⋅박성룡2⋅조종표2⋅백영순1†
  • Author(Eng)
    HYUN SEUNG BYUN1, DANBEE HAN1, SEONGRYONG PARK2, CHONGPYO CHO2, YOUNGSOON BAEK1†
  • Date
    2020-04
  • Attach file
  • Page
    Page. 169~176
  • Abstract(Eng)
  • There is a growing interest in hydrogen energy utilization since an alternative energy development has been demanded due to the depletion of fossil fuels. Hydrogen is produced by the reforming reaction of natural gas and biogas, and the electrolysis of water. An solid oxide electrolyte cell (SOEC) is reversible system that generates hydrogen by electrolyzing the superheated steam or producing the electricity from a fuel cell by hydrogen. If the water can be converted into steam by waste heat from other processes it is more efficient for high-temperature electrolysis to convert steam directly. The reasons are based upon the more favorable thermodynamic and electrochemical kinetic conditions for the reaction. In the present study, steam at over 180℃ and 3.4 bars generated from a boiler were converted into superheated steam at over 700℃ and 3 bars using a cylindrical steam superheater as well as the waste heat of the exhaust gas at 900℃ from a solid refuse fuel combustor. Superheated steam at over 700℃ was then supplied to a high-temperature SOEC to increase the hydrogen production efficiency of water electrolysis. Computational fluid dynamics (CFD) analysis was conducted on the effects of the number of 90° elbow connector for piping, insulation types and insulation layers of pipe on the exit temperature using a commercial Fluent simulator. For two pre-heater injection method of steam inlet and ceramic wool insulation of 100 mm thickness, the highest inlet temperature of SOEC was 744℃ at 5.9 bar.