Akbar Zamaniyan - Department of Modeling and Simulation, Gas Division, RIPI, Tehran, Iran
Hadi Ebrahimi - Department of Chemical Engineering, Sahand University of Technology, Tabriz
Jafar Sadegh Soltan Mohammad Zadeh - Department of Chemical Engineering, Sahand University of Technology, Tabriz
Hossein Ebrahimi - Department of Chemical Engineering, Sahand University of Technology, Tabriz

A 3D Zonal analysis method was applied to an industrial Top Fired furnace. The radiation heat transfer was considered from all gases and surfaces in furnace. Flue gases in furnace were assumed to be non-gray. A maximum temperature in external tube skin was obtained. The results show that a variation in extinction coefficient of combustion gas and effective emissivity of tubes results an insignificant effects on temperatures of tube skin. Also effect of important parameters in the furnace and reactors were discussed.

Top Fire furnace, Simulation, Three dimensional Zonal Method, Radiative Heat Transfer