Numerical simulation of the influence of furnace geometry on its performance in a tangentially fired pulverised-coal supercritical boiler Online publication date: Thu, 13-Jan-2022
by G. Sankar; K.R. Balasubramanian; Chandra Sekhar Dhannina; D. Santhosh Kumar
Progress in Computational Fluid Dynamics, An International Journal (PCFD), Vol. 22, No. 1, 2022
Abstract: The influence of furnace geometry on furnace performance was numerically investigated for a tangentially fired pulverised coal boiler. Six simulation cases were performed using commercial CFD software ANSYS FLUENT by varying the furnace plan area and geometry. The simulations revealed that, with a 20% increase in plan area, a decrease in FEGT was observed, which corresponded to a drop of approximately 30°C for the rectangular furnace and around 25° C for the square furnace over the actual values. The FEGT of the square furnace was greater by around 10°C compared to the rectangular furnace of same plan area. For a 20% increase in plan area, the total NOx generated fell by around 13% for the rectangular furnace and around 9% for the square furnace. The NOx generated was marginally greater for the rectangular furnace compared to the square furnace. It is prudent to select a rectangular furnace to reduce emissions.
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