0
Research Papers

Investigating the Effect of Fuel Rate Variation in an Industrial Thermal Cracking Furnace With Alternative Arrangement of Wall Burners Using Computational Fluid Dynamics Simulation

[+] Author and Article Information
Hossein Mohammad Ghasemi

Faculty of Caspian,
College of Engineering,
University of Tehran,
P.O. Box 43841-119,
Rezvanshahr 43861-56387, Iran

Neda Gilani

Fouman Faculty of Engineering,
College of Engineering,
University of Tehran,
P.O. Box 43515-1155,
Fouman 43516-66456, Iran
e-mail: gilani@ut.ac.ir

Jafar Towfighi Daryan

Faculty of Chemical Engineering,
Tarbiat Modares University,
P.O. Box 14115-143,
Tehran 19166, Iran

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received August 31, 2016; final manuscript received May 14, 2017; published online July 25, 2017. Assoc. Editor: Steve Q. Cai.

J. Thermal Sci. Eng. Appl 9(4), 041012 (Jul 25, 2017) (11 pages) Paper No: TSEA-16-1250; doi: 10.1115/1.4036801 History: Received August 31, 2016; Revised May 14, 2017

A new arrangement of side-wall burners of an industrial furnace was studied by three-dimensional computational fluid dynamics (CFD) simulation. This simulation was conducted on ten calculation domain. Finite rate/eddy dissipation model was used as a combustion model. Discrete ordinate model (DOM) was considered as radiation model. Furthermore, weighted sum of gray gas model (WSGGM) was used to calculate radiative gas properties. Tube skin temperature and heat flux profiles were obtained by solving mass, momentum, and energy equations. Moreover, fuel rate variation was considered as an effective parameter. A base flow rate of fuel (m˙=0.0695kg/s) was assigned and different ratios (0.25 m˙, 0.5 m˙, 2 m˙, and 4 m˙) were assigned to investigate the heat distribution over the furnace. Resulted temperature and heat profiles were obtained in nonuniform mode using the proposed wall burner arrangement. According to the results, despite increased heat transfer coefficient of about 34% for m˙–4 m˙, temperature profile for this rate is too high and is harmful for tube metallurgy. Also, the proper range for fuel rate variation was determined as 0.5–2 m˙. In this range, heat transfer coefficient and Nusselt number for m˙–2 m˙ were increased by 21% and for m˙–0.25 m˙ were decreased by about 28%.

FIGURES IN THIS ARTICLE
<>
Copyright © 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Furnace and reactor schemes

Grahic Jump Location
Fig. 2

Wall burner arrangement on walls A and B: wall A— and wall B—⊗

Grahic Jump Location
Fig. 3

Calculation domain

Grahic Jump Location
Fig. 4

Front view of wall burner arrangement

Grahic Jump Location
Fig. 5

Part of meshed reactor tube and furnace wall

Grahic Jump Location
Fig. 6

Concentration contours: (a) CH4 concentration along the furnace, (b) detailed CH4 concentration, (c) CO concentration along the furnace, and (d) detailed CO concentration at x = 0.238 m for 2 m˙

Grahic Jump Location
Fig. 7

Velocity vectors at the bottom of the furnace for (a) 0.25 m˙, (b) 0.5 m˙, (c)  m˙, (d) 2 m˙, and (e) 4 m˙ at x = 0.238 m

Grahic Jump Location
Fig. 8

Temperature contours in all the fuel rates for (a) 0.25 m˙, (b) 0.5 m˙, (c)  m˙, (d) 2 m˙, and (e) 4 m˙ at x = 0.238 m

Grahic Jump Location
Fig. 9

Flue gas streamlines along the furnace besides a close view at the bottom of the furnace

Grahic Jump Location
Fig. 10

Tube skin temperature profiles for different fuel rates: T—top bends and B—bottom bends

Grahic Jump Location
Fig. 11

Incident radiation for (a) 0.25 m˙, (b) 0.5 m˙, (c)  m˙, (d) 2 m˙, and (e) 4 m˙ in vertical cross section along the furnace at x = 0.238 m

Grahic Jump Location
Fig. 12

Incident radiation for different fuel rates

Grahic Jump Location
Fig. 13

Heat transfer coefficient for each tube in all the fuel rates

Grahic Jump Location
Fig. 14

Nusselt number for each tube in all the fuel rates

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In