锅炉过热与再热蒸汽温度虚拟快速测量的研究
关键词： 主蒸汽温度 滞后 虚拟快速测量 导热反问题 顺序函数法
毕业设计说明书（论文）外文摘要
Title The Study of the Virtual Fast Measurement on Boiler Superheater and Reheat Steam Temperature
Abstract
Temperature measurement in the power plant has been in a very important position. Lag and measurement errors that existed in the current plant measurement methods can easily lead to the superheater burst and other safety hazards. First, the heat transfer process model of a sheathed thermocouple casing is established. On the basis of its analytical solution, the factors which impact temperature measurement response speed are analyzed. Second, according to the sequential function specification method ，the inversion procedure is compiled. Through the slab model to verify the correctness of the inversion procedure. Third, under different inversion conditions, the inversion procedure is used to inverse the main steam temperature, and the quality on inversion results is analyzed. Finally, compare the inversion results with the response of the sheathed thermocouple. The results show that the inversion result obtained by the sequential function specification method is satisfactory, and has been greatly improved in accuracy and lag.
Keywords： Main Steam Temperature Lag Virtual Fast Measurement Inverse Heat Conduction Problem Sequential Function Specification Method
目 录
1 绪论 1
1.1 课题研究背景 1
1.2 国内外研究现状 2
1.3 本文的主要工作 4
2 影响热电偶测温响应快慢的因素分析 5
2.1 温度测量的意义 5
2.2 铠装热电偶的简化数学模型及其求解过程 5
2.3 影响温度测量响应快慢因素的实例分析 9
2.3.1 铠装热电偶套管材料的比热容 对温度测量响应快慢的影响 11
2.3.2 铠装热电偶套管材料的导热系数 对温度测量响应快慢的影响 12
2.3.3 主蒸汽温度变化量对温度测量响应快慢的影响 12
2.3.4 套管外对流换热系数 对温度测量响应快慢的影响 13
3 基于顺序函数法的主蒸汽温度反演模型 15
3.1 导热反问题的分类和主要特点 15
3.1.1导热反问题的分类 15
3.1.2导热反问题的主要特点 15
3.2 铠装热电偶套管传热的反演模型 16
3.2.1导热正问题的模型 16
3.2.2基于顺序函数法的主蒸汽温度的反演原理 17
3.2.3反演主蒸汽温度的基本流程 19