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총괄 열흡수율을 이용한 가열로 내에서의 강재(slab)온도 예측

Prediction of Slab Temperature by the Total Heat Exchange Factor(ØCG)in the Reheating Furnace

HWAHAK KONGHAK, October 1990, 28(5), 527-535(9), NONE
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Abstract

가열로내에서 강재(slab)의 온도를 예측하기 위한 새로운 총괄 열흡수율의 결정방법을 제시하였다. 본 방법은 실측온도와 예측온도의 차의 제곱을 목적함수로 정하고 이 목적함수가 최소로 되는 조건에서 강재 내부온도와 표면 열유속을 결정하는 것이다. 이 방법의 타당성을 검토하기 위해 유효 로장 36m의 walking beam type의 가열로에서 강재의 온도를 내열 data logger system을 이용하여 직접측정하였다. 실측치와 예측온도를 비교해 본 결과 이 방법이 가열로내 강재의 온도예측의 잘 적용됨을 보였다.
A new method to determine total heat exchange factor was proposed for the prediction of slab tem-perature in reheating furnace. This method employed the square of the difference between measured and predicted temperature as an objective function. The slab temperature and surface heat flux were calculated under the condition minimizing the objective function. The real slab temperature in a walking beam type reheating furnace with 36m of its effective length was directly measured by using a heat resistive data logger system. The present method was validated by showing that the pre-dicted slab temperature was in a good agreement with the measured one.

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References

Veslocki TA, Smith CC, Kelly CD, Iron & Steel Engineer, December, 47 (1986)
Lee GS, Yoo EJ, Song DI, HWAHAK KONGHAK, 23(3), 137 (1985)
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