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Simulation of Combustion and Thermal Flow in an Industrial Boiler
Abstract
Industrial boilers that produce steam or electric
power represent a crucial facility for overall plant
operations. To make the boiler more efficient, less
emission (cleaner) and less prone to tube rupture
problems, it is important to understand the
combustion and thermal flow behaviors inside the
boiler. This study performs a detailed simulation of
combustion and thermal flow behaviors inside an
industrial boiler.
The simulations are conducted using the
commercial CFD package FLUENT. The 3-D
Navier-Stokes equations and five species transport
equations are solved with the eddy-breakup
combustion model. The simulations are conducted in
three stages. In the first stage, the entire boiler is
simulated without considering the steam tubes. In the
second stage, a complete intensive calculation is
conducted to compute the flow and heat transfer
across about 496 tubes. In the third stage, the results
of the saturator/superheater sections are used to
calculate the thermal flow in the chimney. The results
provide insight into the detailed thermal-flow and
combustion in the boiler and showing possible
reasons for superheater tube rupture. The exhaust gas
temperature is consistent with the actual results from
the infrared thermograph inspection.
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Citation
Saripalli, R.; Wang, T.; Day, B. (2005). Simulation of Combustion and Thermal Flow in an Industrial Boiler. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from https : / /hdl .handle .net /1969 .1 /5603.