Numerical Investigation of heat transfer in fire heater tube of the gas unit of Tehran Refinery

Subject Areas : Fluid Mechanic

احد عابدینی ¹ ( هیئت علمی )
علی حیدری ² ( هیات علمی )

Received: 2015-06-21 Accepted : 2015-07-03 Published : 2012-11-21

Keywords: Combustion, fire Heater, exceed air, mass flow rate,

Abstract :

One of the most fundamental problems in the furnace and fire heaters control and maintain the temperature of the tube in allowed range. In this study, heat transfer in tubes of Tehran refinery gas unit heater is investigated numerically. Simulation of combustion furnace has done by FIHR software and modeling of fluid flow is done by commercial Fluent soft war so that the surface temperature of the pipe is obtained. The results show that with increasing combustion air up to 15% can reduce the surface temperature of pipes. In addition, reducing the fluid flow rate to the amount foreseen in the design process as well as increasing combustion air temperature leads to the higher surface temperature of pipes.