Optimization of a slab heating pattern for minimum energy consumption in a walking-beam type reheating furnace

Jiin Yuh Jang, Jun Bo Huang

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

Abstract A two-dimensional mathematical heat transfer model for the prediction of the temperature history of steel slabs was performed in order to obtain the optimal heating pattern of these slabs with minimum energy consumption in a walking-beam type reheating furnace. An algorithm developed with a simplified conjugated-gradient method combined with a shooting method, was used as an optimizer to design the furnace temperature distribution, including the preheating zone, heating zone and soaking zone temperatures. Comparison with the in-situ experimental data indicated that the present heat transfer model works well for the prediction of the thermal behavior of a slab in the reheating furnace. The effect of the furnace temperature distribution on the design requirements, such as energy required for heating a slab, slab temperature uniformity at the furnace exit and slab discharging temperature, were investigated. The parametric study results indicated that energy consumption significantly decreases with reductions in the preheating zone temperature. The optimal design also resulted in lower energy consumption for heating a slab as compared to the original operational conditions in the steel plant.

Original languageEnglish
Article number6547
Pages (from-to)313-321
Number of pages9
JournalApplied Thermal Engineering
Volume85
DOIs
Publication statusPublished - 2015 Jun 25

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

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