Optimization and control of one dimensional packed bed model of underground coal gasification

被引：16

作者：

Uppal, Ali Arshad ^{[1
]}

Bhatti, Aamer Iqbal ^{[2
]}

Aamir, Erum ^{[2
]}

Samar, Raza ^{[2
]}

Khan, Shahid Ahmed ^{[1
]}

机构：

[1] COMSATS Inst Informat Technol, Islamabad, Pakistan

[2] Mohammad Ali Jinnah Univ, Islamabad, Pakistan

来源：

JOURNAL OF PROCESS CONTROL | 2015年 / 35卷

关键词：

Underground coal gasification (UCG); 1-D packed bed model; Sequential quadratic programming (SQP); Second order sliding mode control (SOSMC);

D O I：

10.1016/j.jprocont.2015.08.002

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper discusses the optimization and control of the one dimensional (1-D) packed bed model of underground coal gasification (UCG) process for an actual UCG site. The optimization is performed to compensate for the uncertainty in coal and char ultimate analysis (caused by repeated measurements of different samples) and in steam to oxygen (O-2) ratio at the reaction front. The constrained nonlinear optimization problem is solved by using state of the art sequential quadratic programing (SQP) algorithm to minimize the error between experimental and simulated heating values. The results of the optimized model are validated with actual filed trials which show a good match for heating value of the product gases. The super twisting controller, a second order sliding mode control (SOSMC) algorithm is successfully implemented on the process model, which keeps the heating value of the product gas at the desired level in the presence of the matched disturbance: steam produced from water influx from surrounding aquifers and due to the moisture content of the coal. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：11 / 20

页数：10

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