Online simulation model of the slab-reheating process in a pusher-type furnace

Jaklič, Anton; Vode, Franci; Kolenko, Tomaž

doi:10.1016/j.applthermaleng.2006.07.033

Cited by 66 publications

(29 citation statements)

References 3 publications

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“…For a simulation model of the considered furnace, the radiative heat transfer should be accurately captured. To avoid the effort of computing direct exchange areas for the zone method, various simplified approaches have been proposed in the literature on furnace modeling [27,29,30]. In [27], e.g., furnaces are considered as tubes and are discretized in the longitudinal direction into finite volume zones.…”

Section: Case Study -Industrial Furnacementioning

confidence: 99%

Efficient numerical computation of direct exchange areas in thermal radiation analysis

Feischl

Führer

Niederer

et al. 2016

Numerical Heat Transfer, Part B: Fundamentals

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The analysis of thermal radiation in multisurface enclosures typically involves multiple integrals with four, five, or six variables. Major difficulties for the numerical evaluation of these integrals are nonconvex geometries and singular integral kernels. This paper presents hierarchical visibility concepts and coordinate transformations which eliminate these difficulties. In the transformed form, standard quadrature techniques are applied, and accurate results are achieved with moderate numerical effort. In benchmark example problems, the effectiveness and accuracy of the method are validated. A simulation model of an industrial furnace demonstrates the applicability of the method for large-scale problems. ARTICLE HISTORY

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Section: Case Study -Industrial Furnacementioning

confidence: 99%

Efficient numerical computation of direct exchange areas in thermal radiation analysis

Feischl

Führer

Niederer

et al. 2016

Numerical Heat Transfer, Part B: Fundamentals

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“…(working-beam type) [5,6], 롤러허스(roller-hearth type) [7,8], 푸셔(pusher-type) [9,10] 등이 있으나, 가장 Table 2에 지금까지 설명한 슬랩의 변위를 정리하여 나타 냈다. (1) 슬랩의 길이 방향에로의 처짐 변위는 폭 방 향에 비해 무시할 정도로 미미하게 예측되었다.…”

Section: 서 론unclassified

Numerical Study of Shadow Effect on Slab Deformation in Reheating Furnace

Noh¹,

Hwang²,

Kim³

2011

Transactions of Materials Processing

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Three dimensional simulations were performed for the deformation of a slab in a roller hearth type slab reheating furnace. The main objective of this study was to examine the deformation pattern of the slab due to the shadow effect, i.e., the temperature difference between the upper and lower slab surfaces, in particular, the variations of displacement and effective stress in the vertical direction. A commercially available FE code, ANSYS Workbench 12.1 TM , was used in a fully coupled thermo-elasticity analysis. Several cases with different slab surface temperatures were selected for the simulations. For the sake of simplicity, the temperature environment inside the furnace was assumed to be homogeneous for the upper and lower faces of the slab. Two cases of with different slab width were selected as model geometry. The deformation patterns were computed and explained in terms of periodicity and symmetry. The results indicated that the shadow effect leads to a significant displacement in the vertical direction and, thereby, is one of the main reasons for the separation of the slab and its supports. These simulations also predicted that the deformation is more severe along the transverse direction than along the longitudinal direction.

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“…A typical reheating rule for a given charging type consists of settings for all six zone temperatures and the velocity of the slab transition through the furnace, VR. An online mathematical model of the slab-reheating process [7] is used for the simulation of the existing reheating rules. To obtain the RRC of a selected charging type, the zone temperatures and VR are set, as specified by the given reheating rule and the simulation starts running.…”

Section: Furnace Control Systemmentioning

confidence: 99%

A Furnace Control System for Tracing Reference Reheating Curves

Vode

Jaklič

Kokalj

et al. 2008

steel research international

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A control system for tracing the reference reheating curves of individual steel slabs in continuous furnaces is presented. The system enables the predefined, controllable reheating of slabs in a furnace. The slab temperatures are obtained by the simulation of a mathematical model of the slab‐reheating process. The interior of the continuous furnace is divided into six control zones. The individual zone temperatures are adjusted by the control system in such a way that the temperatures of the slabs in the zone are as close as possible to the desired slab temperatures. To take into account delays in the production line and to synchronize the furnace with the rolling mill's capacities, a time shift of the reference reheating curves and a prolonged drop‐out interval are introduced.

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Online simulation model of the slab-reheating process in a pusher-type furnace

Cited by 66 publications

References 3 publications

Efficient numerical computation of direct exchange areas in thermal radiation analysis

Efficient numerical computation of direct exchange areas in thermal radiation analysis

Numerical Study of Shadow Effect on Slab Deformation in Reheating Furnace

A Furnace Control System for Tracing Reference Reheating Curves

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