Radiative slab heating analysis for various fuel gas compositions in an axial-fired reheating furnace

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A transient radiative slab heating analysis was performed to investigate the effect of various fuel mixtures on the performance of an axial-fired reheating furnace. The various fuel mixtures tested were assumed to be attained by mixing COG (coke oven gas) and BFG (blast furnace gas), which are the two main byproduct gases found in the integrated steel mill industry. The numerical prediction of radiative heat transfer was calculated using an FVM radiation solving method, which is a well-known and efficient method for curvilinear coordinates. The WSGGM (weighted sum of gray gas model) was also adopted to calculate the radiative heat transfer in composition dependent media. The entire furnace was divided into fourteen sub-zones to calculate the radiative thermal characteristics of the furnace without flow field calculations. Each sub-zone was assumed to have homogeneous media and wall temperatures. All of the medium and wall temperatures were computed by calculating the overall heat balance using some relevant assumptions. The overall heat balance was satisfied when the net heat input equaled the three sources of heat loss in each sub-zone, wall loss, skid loss, and slab heating loss. (C) 2012 Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2012-07
Language
English
Article Type
Article
Keywords

FINITE-VOLUME METHOD; WALKING-BEAM TYPE; WEIGHTED-SUM; NUMERICAL-ANALYSIS; MODEL; PREDICTION

Citation

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v.55, no.15-16, pp.4029 - 4036

ISSN
0017-9310
DOI
10.1016/j.ijheatmasstransfer.2012.03.041
URI
http://hdl.handle.net/10203/103378
Appears in Collection
ME-Journal Papers(저널논문)
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