THERMAL SCIENCE

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Eakarach Somriewwongkul

,

Chittin Tangthieng

NUMERICAL INVESTIGATION OF THE EFFECT OF THE INSULATION THICKNESS ON THE DEGREE OF NONUNIFORMITY OF THE BILLET TEMPERATURE

ABSTRACT
The degree of nonuniformity of the billet temperature subjected to the radiative heat loss to the discharge door with different insulation thicknesses is investigated in this present study. The 2-D steady-state heat conduction for the billet subjected to different heat fluxes is solved by being transformed into a dimensionless form. The Gauss-Seidel iterative method for a finite volume discretization of the billet is employed to obtain the temperature distribution of the billet. The numerical result is validated by comparing with the field measurement data. A qualitative agreement between these two is observed. An effect of different insulation thicknesses on the heat-transfer characteristics and the degree of nonuniformity of the billet temperature is examined. In case of the replaced 50-mm thick insulation of the discharge door, the radiative heat loss to the discharge door is reduced by 49% with the replaced insulation, and the degree of nonuniformity of the billet temperature is decreased by 23°C.
KEYWORDS
reheating furnace, radiative heat loss, finite volume method, degree of nonuniformity, insulation thickness
PAPER SUBMITTED: 2012-04-19
PAPER REVISED: 2014-06-11
PAPER ACCEPTED: 2014-07-18
PUBLISHED ONLINE: 2014-08-03
DOI REFERENCE: https://doi.org/10.2298/TSCI120419089S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2015, VOLUME 19, ISSUE Issue 3, PAGES [1097 - 1105]
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Numerical investigation of the effect of the insulation thickness on the degree of nonuniformity of the billet temperature

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