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The Comparative Analysis of Numerical and Experimental Results for Prediction of Workpiece Temperature in the Commercial Reheating Furnace

상용급 재가열로에서 소재 온도 예측을 위한 해석과 실험 결과의 비교 분석

  • Lee, Chunsik (Plant Engineering Center, Institute for Advanced Engineering) ;
  • Lee, Jae Yong (Plant Engineering Center, Institute for Advanced Engineering) ;
  • Ryu, BoHyun (Plant Engineering Center, Institute for Advanced Engineering) ;
  • Rhim, DongRyul (Plant Engineering Center, Institute for Advanced Engineering)
  • 이춘식 (고등기술연구원 플랜트엔지니어링센터) ;
  • 이재용 (고등기술연구원 플랜트엔지니어링센터) ;
  • 유보현 (고등기술연구원 플랜트엔지니어링센터) ;
  • 임동렬 (고등기술연구원 플랜트엔지니어링센터)
  • Received : 2018.12.26
  • Accepted : 2019.08.26
  • Published : 2019.08.31

Abstract

Specially designed test material was used for workpiece temperature measurement in the commercial reheating furnace and a linearized thermal model was applied for real time temperature prediction. The applied furnace is a walking beam type and specification of the workpiece is a STS302 which is 160mm in width, 160mm in height and 8100mm in length. Also six thermocouples were installed in width, height and length direction for temperature measurement. Ambient temperature in the furnace was raised to 1265 Celsius degrees and it took about 2.5 hours from loading to discharging of the workpiece. As a result of the experiment, temperature of the workpiece at discharge was 1257 Celsius degrees on the average in the range of 1256 to 1259 Celsius degrees, and predicted average temperature through the thermal model was 1251 Celsius degrees. Therefore, the deviation of the analysis and test results is about 6 degrees, which is within the range of 10 degrees required by the industry.

상용급 재가열로 내부 소재 온도 측정을 위하여 특수 제작된 시험용 시편을 사용하고, 실시간 온도 예측을 위하여 선형화 된 열모델이 적용되었다. 적용된 로는 Walking Beam Type이고 소재의 형상은 폭 160mm, 높이 160mm, 길이 8100mm의 STS302 재질이며 온도 측정을 위해 폭, 높이와 길이 방향으로 총 6개의 열전대를 설치하였다. 로내의 분위기 온도는 섭씨 1265도까지 상승시켰으며 소재의 장입부터 토출까지 약 2.5시간이 소요되었다. 시험결과, 토출 시 소재의 온도는 섭씨 1256~1259도 범위에서 평균적으로 1257도 였으며, 열모델을 통한 예측된 평균 온도는 1251도로 나타났다. 따라서 해석과 시험결과의 편차는 6도 정도로서, 이는 산업계에서 요구되는 10도 이내의 범위에 있다.

Keywords

References

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