共查询到20条相似文献,搜索用时 109 毫秒
1.
2.
本文采用支持向量机方法建立了350MW燃煤电站锅炉NOx预测模型和锅炉效率预测模型,并采用遗传算法对NOx和锅炉效率进行多目标优化,表明支持向量机和遗传算法可以用于指导参数调节,进行燃烧优化。 相似文献
3.
4.
5.
6.
7.
8.
煤粉锅炉炉膛火焰温度场的测量是燃烧调整的基础,对于锅炉的燃烧经济性、安全性诊断以及优化运行有着重要的意义.利用4个面阵CCD获取的火焰图像的数字信号,在分析测试系统物理模型和炉膛火焰温度分布规律的基础上,建立了非线性多目标优化数学模型,并应用PSO算法和文中提出的微粒群.鲍威尔混和算法(PSOPowell)对其进行了求解.并在某电站350 MW锅炉上进行了多负荷工况下的实际测试.结果表明,此混合算法提高了PSO算法的寻优能力,利用其重建的温度场可以作为燃烧诊断和优化运行的重要依据. 相似文献
9.
10.
11.
燃烧火焰是燃烧状态稳定与否的最直接反映。利用可视化火焰检测系统对两台机组进行实炉测量,从火焰图像中提取更多的监视和诊断信息,对实验结果进行了分析。实验结果表明:该系统能够正确、实时跟踪燃烧火焰的温度变化,定量给出火焰温度变化,快速地对燃烧状态进行检测。 相似文献
12.
W型火焰锅炉炉膛温度场的可视化试验研究 总被引:1,自引:0,他引:1
使用火焰辐射图像探测系统探测炉膛空间发射到镜头各像素的辐射能量,然后从能量传递和平衡的角度,由所得图像重建空间的温度场。在300MW机组W型火焰炉进行了炉膛二维断面温度场可视化重建试验。试验在炉膛壁面布置4个CCD火焰探测器,采用计算机图像采集处理技术获取炉膛火焰辐射图像,通过对火焰辐射图像的处理以厦相关算法,重建炉膛断面温度分布、可动态反映火焰断面温度水平、火焰中心的偏穆和火焰刷墙等燃烧异常工况。断面温度场可视化结果刷新一次的时间不超过5S,满足在线监测的要求。 相似文献
13.
Experimental Study on Measurement of Flame Temperature Distribution Using the Two-Color Method 总被引:2,自引:0,他引:2
Fan Jiang Shi Liu Gang Lu Yong Yan Haigang Wang Yanmin Song Renxiong Ma Zhonggang PanInstitute of Engineering Thermophysics Chinese Academy of Sciences Beijing ChinaAdvanced Instrumentation Control Research Center Greenwich University UK 《热科学学报(英文版)》2002,11(4):378-382
A novel optical instrumentation system for flame characterization was developed and tested. The two-color system is capable of performing on-line measurement of flame and temperature distribution, providing temporal and spatial characterization of the combustion process. In addition, the system has the advantage of being non-intrusive. The on-line measurement of temperature distribution on a methane-air combustor revealed some interesting characteristics. When air flow rate was kept constant, an increase in CH4 flow rate would enhance the combustion intensity and elevate the flame temperature. While under constant CH4 flow rate, the increase of air flow rate would lead the measured flame temperature first to increase and then decrease. The drop of temperature might partially be caused by the heat losses due to excessive air. However, with insufficient soot particles in the flame, the temperature could be under-evaluated. 相似文献
14.
Zhihong LI Shi LIU Huaiping MU Fan JIANG Jianmin GUO Institute of Engineering Thermophysics Chinese Academy of Sciences P.O. Box Beijing P.R. China. 《热科学学报(英文版)》2004,13(4):371-375
This paper presents a study on a novel instrumentation system for the measurement of temperature distribution of combustion flames. This system operates upon the three-color principle combining advanced optical sensing and digital image processing techniques. It comprises an endoscope, a light splitter assembly, a CCD camera, a frame-grabber and associated software. This system was calibrated using a blackbody furnace as standard temperature source. The relationship between flame temperatures and grey-level of the images was established through image processing and function correlation. Experimental results obtained on a gas-fired combustion rig provide flame images and temperature distributions on three different wavelengths. Based on the flame temperature distribution the combustion conditions can be analyzed. Experimental results also reveal that this system is capable of online measurement of temperature distribution in a combustion zone. This system can potentially be applied to many areas such as power generation, metallurgy, chemical engineering. It is also a powerful tool for improving the control of combustion process. 相似文献
15.
16.
17.
18.
For a solid oxide fuel cell (SOFC) integrated into a micro gas turbine (MGT) hybrid power system, SOFC operating temperature and turbine inlet temperature are the key parameters, which affect the performance of the hybrid system. Thus, a least squares support vector machine (LS-SVM) identification model based on an improved particle swarm optimization (PSO) algorithm is proposed to describe the nonlinear temperature dynamic properties of the SOFC/MGT hybrid system in this paper. During the process of modeling, an improved PSO algorithm is employed to optimize the parameters of the LS-SVM. In order to obtain the training and prediction data to identify the modified LS-SVM model, a SOFC/MGT physical model is established via Simulink toolbox of MATLAB6.5. Compared to the conventional BP neural network and the standard LS-SVM, the simulation results show that the modified LS-SVM model can efficiently reflect the temperature response of the SOFC/MGT hybrid system. 相似文献
19.