ZHANG Dianhua
,
WANG Bingxing
,
ZHOU Na
,
YU Ming
,
WANG Jun
钢铁研究学报(英文版)
Heat transfer was researched from a perspective of the industry application. On the basis of the first law of thermodynamics, the cooling efficiency was deduced from the change of enthalpy inside hot plate. The relationship between the cooling efficiency and its influencing parameters was regressed from plenty of data collected from the worksite and discussed in detail. The temperature profiles resulting from the online model and the model modified by regressed formulas were presented and compared. The results indicated that the control accuracy of the modified model was increased obviously.
关键词:
hot rolled plate;laminar cooling;cooling efficiency;temperature profile
WANG Bingxing
,
CHEN Xiaolin
,
TIAN Yong
,
WANG Zhaodong
,
WANG Jun
,
ZHANG Dianhua
钢铁研究学报(英文版)
The healthy and rapid development of the controlled cooling technology was hampered by the uneven cooling phenomenon. During the process of hot plate production, the homogeneous cooling along the length direction of plate was constrained by lots of factors. And because the speed was a flexible control parameter, the calculation method of optimal speed profile was developed based on the measured start cooling temperature and its matrix equation was solved by the Cholesky decomposition method. The optimal speed profile was used in online control system. As a result, the temperature distribution along the plate length direction was relatively uniform, and 95% of measured final cooling temperature difference from the target temperature 700 ℃ was controlled within ±20 ℃.
关键词:
plate
,
controlled cooling
,
homogeneous cooling
,
speed profile
,
Cholesky decomposition method
