Thermodynamic properties calculation of the flue gas based on its composition estimation for coal-fired power plants

被引：13
|
作者：
Xu, Liang
Yuan, Jingqi [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Dept Automat, Shanghai 200240, Peoples R China
来源：
APPLIED THERMAL ENGINEERING | 2015年 / 90卷
基金：
美国国家科学基金会;
关键词：
Online calculation; Thermodynamic property; Flue gas; Composition estimation; Component sensitivity; HUMID AIR; WATER; HEAT; FORMULATION; MODELS;
D O I：
10.1016/j.applthermaleng.2015.07.018
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Thermodynamic properties of the working fluid and the flue gas play an important role in the thermodynamic calculation for the boiler design and the operational optimization in power plants. In this study, a generic approach to online calculate the thermodynamic properties of the flue gas is proposed based on its composition estimation. It covers the full operation scope of the flue gas, including the two-phase state when the temperature becomes lower than the dew point. The composition of the flue gas is online estimated based on the routinely offline assays of the coal samples and the online measured oxygen mole fraction in the flue gas. The relative error of the proposed approach is found less than 1% when the standard data set of the dry and humid air and the typical flue gas is used for validation. Also, the sensitivity analysis of the individual component and the influence of the measurement error of the oxygen mole fraction on the thermodynamic properties of the flue gas are presented. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：366 / 375
页数：10
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