August 2021

Heat Transfer

Embrace tube metal temperature factor (FT) in fired heater design

Fired heaters are one of the most critical pieces of equipment in a refinery. They

Batra, K., Agarwal, N., Engineers India Ltd.

are capital intensive and occupy significant plot space, so due consideration must be given to all factors influencing a fired heater design. Estimation of peak heat fluxes and tube metal temperatures (TMTs) are some of the critical parameters that have significant impact on heater design. While providing process specifications, licensors may restrict the furnace designer on maximum allowable average radiant heat flux based on their own design considerations. Most furnace designers will strive to design the furnace at this maximum allowable average radiant heat flux value provided by the licensor, as it would minimize the heater cost, making its design competitive. TMT plays a significant r

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