基于MATLAB的换热器网络数据协调约束模型建立
关键词 数据协调；MATLAB；换热器网络；约束矩阵
毕业论文设计说明书外文摘要
Title The data reconciliation constraint model of heat exchanger network based on MATLAB
Abstract
Measurements of chemical process, referring to the material flow rate, composition, temperature, pressure and phase separation rate. In general, the measured value is difficult to precisely meet certain inherent physical and chemical laws of chemical process. For example, to calculate the relationship between the chemical reaction, the material and energy balances, etc. In this paper, the heat exchanger network for an object, for random error actually exists and significant error,establish a network of measuring heat flow and energy constraint matrix, and data reconciliation. In the presence of heat exchanger networks separator, heat exchanger and mixer three types of devices,for these three different means, determine the material balance of each device and the energy balance, by linearization method, the nonlinear constrained problem into linear problem, and lists the matrix for data reconciliation. After determining the constraint matrix of each device, according MATLAB, according to the characteristics of the heat exchanger assembly, automatic establish heat flow and energy constraint matrix for data reconciliation.
Keywords Data coordination；MATLAB; exchanger; Constraint matrix
目 次
1 引言 1
1.1 研究背景与意义 1
1.2 国内外研究现状 1
1.3 课题研究主要工作 3
2 换热器网络介绍 4
2.1 分离器 4
2.2 换热器 5
2.3 混合器 5
2.4 换热器的物料及能量平衡方程 5
3 数据校正 7
3.1 数据校正技术 6
3.2 Lagrange法 8
3.3 Crowe投影矩阵法8
3.4 线性化法 9
4 建立换热器网络约束矩阵11
4.1 线性约束矩阵的自动生成11
4.2 非线性约束矩阵的自动生成16
结论19
致谢 20
参考文献 21
1 引言
1.1 研究背景与意义
作为显示装置运行状态的信息，化工过程数据是完成计算机过程控制、模拟、过程完善和生产管理的根本依据，可以理论上满足包括物料平衡、能量平衡等的物理、化学规律。在实际的化工生产过程中，因为过程有来自仪表的精度和环境的影响，与过程有关的物料流量、物料温度和物料浓度等检测的数据，而在测量时产生误差而不能完全满足化工过程的内在规律，还可能会产生因为测量仪表失灵、设备出现泄露以及不正确的操作等各种原因造成的数据的严重偏差。资源合理调度和正确决策分析的基础来自数据的准确性和可靠性，然而工业测量数据中存在的各类误差常常会破坏工业过程固有的平衡，数据协调的目的就是利用各类冗杂信息对测量数据中的误差进行校正，使其满足于约束平衡方程。