复杂的炉内热交换过程容易导致根据总括热吸收率法建立的加热过程数学模型的计算精度降低。为解决该问题,在建立钢坯加热过程数学模型的基础上,提出了总括热吸收率的试验修正方法。采用拖偶试验测得了钢坯在炉内不同位置的温度,计算出不同位置处的总括热吸收率,并将其与模型给定值相比较,从而确定总括热吸收率的补偿值。仿真结果表明,修正模型计算所得钢坯温度与试验测量结果非常接近,该试验修正方法可以满足钢坯加热过程在线试时控制的精度要求。
Computational accuracy of heating process mathematical model based on total heat exchange factor（THEF） method was found easy to decrease due to complex heat exchange process in a furnace.To solve this problem,an experimental correction method of dynamic compensation of THEF was therefore proposed on the basis of establishing steel heating process mathematical model.Temperatures of steel at different positions were measured by dragging coupling method.Then the corresponding THEFs can be achieved,and they were compared with those from model computation to determine the compensation values of THEF.Simulation results show that steel temperatures from the proposed model approaches experimental data and the experimental correction method meets the requirement of accuracy for online and real-time control in steel heating process.
参考文献
| [1] | Lusheng GE.Application study of complex control algorithm for regenerative furnace temperature[J].控制理论与应用(英文版),2004(02):205-207. |
| [2] | Tiwari M K;Mukhopadhyay A;Sanyal D .Process Modeling for Control of a Batch Heat Treatment Furnace With Low NOx Radiant Tube Burner[J].Energy Conversion and Manage- ment,2005,46(13/14):2093. |
| [3] | Evans D M;Belambe A R;Bovan M R et al.Reheat Furnace Supervisory Control System at Ipsco Inc[J].AISE Steel Tech- nology,2000,77(07):33. |
| [4] | 陈海耿,王子弟,吴彬,陈友文,权芳民.连续加热炉在线控制系统的仿真研究[J].钢铁,2006(12):75-78. |
| [5] | Jaklic A;Vode F;Kolenko T .Online Simulation Model of the Slab-Reheating Process in a Pusher Type Furnace[J].Applied Thermal Engineering,2007,27(05):1105. |
| [6] | Coelho PJ.;Carvalho MG.;Trivic DN.;Goncalves JM. .Modelling of radiative heat transfer in enclosures with obstacles[J].International Journal of Heat and Mass Transfer,1998(4/5):745-756. |
| [7] | E. P. Keramida;H. H. Liakos;M. A. Founti;A. G. Boudouvis;N. C. Markatos .Radiative heat transfer in natural gas-fired furnaces[J].International Journal of Heat and Mass Transfer,2000(10):1801-1809. |
| [8] | Kim S H;Huh K Y .A New Angular Discretization Scheme of the Finite Volume Method for 3-D Radiative Heat Transfer in Absorbing,Emitting and Anistropically Scattering Media[J].International Journal of Heat and Mass Transfer,2000,43(07):1233. |
| [9] | 巢海,王伟,李小平.步进梁式加热炉钢温预报的数学模型[J].东北大学学报(自然科学版),1998(05):499. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%