Effect of the burner position on an austenitizing process in a walking-beam type reheating furnace

Alex M. García, Andrés F. Colorado, Julián E. Obando, Carlos E. Arrieta, Andrés A. Amell

Resultado de la investigación: Contribución a una revistaArtículoInvestigaciónrevisión exhaustiva

Resumen

An analysis of the effect of burner location on the performance of a walking-beam type reheating furnace for an austenitizing process is presented in this work. Four configurations were evaluated, where the main difference was the position of four high-speed self-recuperative burners. The analysis was done through computational fluid dynamics (CFD) simulations, using a set of models suitable, and previously validated, to consider combustion, heat transfer, and billet heating, all in a 3D steady-state calculation. The self-recuperative burners were modeled by programming a custom user-defined-function (UDF) for the specific burner. This UDF calculates air preheating temperature in each burner as a function of air mass flow rate and the flue gas temperature entering the burner recuperator. The efficiency of the heating process, the billet heating characteristics, and the heat transfer rate to the billets for the different configurations were analyzed and compared. The results show that position and type of burners have a great effect on the furnace performance. The entrance of cold air through the furnace openings was responsible for the lower efficiencies and some billet heating problems observed. The configuration with the burners staggered on the sidewalls presented the best results in terms of energy efficiency and the billet heating characteristics required for an austenitizing process (heating rate, austenitizing temperature, holding time, and temperature uniformity).

Idioma originalInglés
Páginas (desde-hasta)633-645
Número de páginas13
PublicaciónApplied Thermal Engineering
Volumen153
DOI
EstadoPublicada - 5 may 2019

Huella dactilar

Fuel burners
Furnaces
Industrial heating
Heating
Air
Heat transfer
Recuperators
Heat problems
Temperature
Preheating
Heating rate
Flue gases
Energy efficiency
Computational fluid dynamics
Flow rate
Computer simulation

Citar esto

García, Alex M. ; Colorado, Andrés F. ; Obando, Julián E. ; Arrieta, Carlos E. ; Amell, Andrés A. / Effect of the burner position on an austenitizing process in a walking-beam type reheating furnace. En: Applied Thermal Engineering. 2019 ; Vol. 153. pp. 633-645.
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abstract = "An analysis of the effect of burner location on the performance of a walking-beam type reheating furnace for an austenitizing process is presented in this work. Four configurations were evaluated, where the main difference was the position of four high-speed self-recuperative burners. The analysis was done through computational fluid dynamics (CFD) simulations, using a set of models suitable, and previously validated, to consider combustion, heat transfer, and billet heating, all in a 3D steady-state calculation. The self-recuperative burners were modeled by programming a custom user-defined-function (UDF) for the specific burner. This UDF calculates air preheating temperature in each burner as a function of air mass flow rate and the flue gas temperature entering the burner recuperator. The efficiency of the heating process, the billet heating characteristics, and the heat transfer rate to the billets for the different configurations were analyzed and compared. The results show that position and type of burners have a great effect on the furnace performance. The entrance of cold air through the furnace openings was responsible for the lower efficiencies and some billet heating problems observed. The configuration with the burners staggered on the sidewalls presented the best results in terms of energy efficiency and the billet heating characteristics required for an austenitizing process (heating rate, austenitizing temperature, holding time, and temperature uniformity).",
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Effect of the burner position on an austenitizing process in a walking-beam type reheating furnace. / García, Alex M.; Colorado, Andrés F.; Obando, Julián E.; Arrieta, Carlos E.; Amell, Andrés A.

En: Applied Thermal Engineering, Vol. 153, 05.05.2019, p. 633-645.

Resultado de la investigación: Contribución a una revistaArtículoInvestigaciónrevisión exhaustiva

TY - JOUR

T1 - Effect of the burner position on an austenitizing process in a walking-beam type reheating furnace

AU - García, Alex M.

AU - Colorado, Andrés F.

AU - Obando, Julián E.

AU - Arrieta, Carlos E.

AU - Amell, Andrés A.

PY - 2019/5/5

Y1 - 2019/5/5

N2 - An analysis of the effect of burner location on the performance of a walking-beam type reheating furnace for an austenitizing process is presented in this work. Four configurations were evaluated, where the main difference was the position of four high-speed self-recuperative burners. The analysis was done through computational fluid dynamics (CFD) simulations, using a set of models suitable, and previously validated, to consider combustion, heat transfer, and billet heating, all in a 3D steady-state calculation. The self-recuperative burners were modeled by programming a custom user-defined-function (UDF) for the specific burner. This UDF calculates air preheating temperature in each burner as a function of air mass flow rate and the flue gas temperature entering the burner recuperator. The efficiency of the heating process, the billet heating characteristics, and the heat transfer rate to the billets for the different configurations were analyzed and compared. The results show that position and type of burners have a great effect on the furnace performance. The entrance of cold air through the furnace openings was responsible for the lower efficiencies and some billet heating problems observed. The configuration with the burners staggered on the sidewalls presented the best results in terms of energy efficiency and the billet heating characteristics required for an austenitizing process (heating rate, austenitizing temperature, holding time, and temperature uniformity).

AB - An analysis of the effect of burner location on the performance of a walking-beam type reheating furnace for an austenitizing process is presented in this work. Four configurations were evaluated, where the main difference was the position of four high-speed self-recuperative burners. The analysis was done through computational fluid dynamics (CFD) simulations, using a set of models suitable, and previously validated, to consider combustion, heat transfer, and billet heating, all in a 3D steady-state calculation. The self-recuperative burners were modeled by programming a custom user-defined-function (UDF) for the specific burner. This UDF calculates air preheating temperature in each burner as a function of air mass flow rate and the flue gas temperature entering the burner recuperator. The efficiency of the heating process, the billet heating characteristics, and the heat transfer rate to the billets for the different configurations were analyzed and compared. The results show that position and type of burners have a great effect on the furnace performance. The entrance of cold air through the furnace openings was responsible for the lower efficiencies and some billet heating problems observed. The configuration with the burners staggered on the sidewalls presented the best results in terms of energy efficiency and the billet heating characteristics required for an austenitizing process (heating rate, austenitizing temperature, holding time, and temperature uniformity).

KW - Austenitizing process

KW - Billet heating

KW - CFD

KW - Heat treatment

KW - Reheating furnace

KW - Self-recuperative burner

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EP - 645

JO - Applied Thermal Engineering

JF - Applied Thermal Engineering

SN - 1359-4311

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