A new model for evaluation of cavity shape and volume during Underground Coal Gasification process

被引：22
|
作者：
Jowkar, Amin [1 ]
Sereshki, Farhang [1 ]
Najafi, Mehdi [2 ]
机构：
[1] Shahrood Univ Technol, Dept Min Engn Petr & Geophys, Shahrood, Iran
[2] Yazd Univ, Dept Min & Met Engn, Yazd, Iran
来源：
ENERGY | 2018年 / 148卷
关键词：
Underground coal gasification (UCG); Cavity shape; Cavity volume; Computational fluid dynamics (CFD); COMSOL; GROWTH; SIMULATION;
D O I：
10.1016/j.energy.2018.01.188
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Coal seams are converted to syngas by advanced thermo-chemical processes through Underground Coal Gasification (UCG) method. Inability to predict the shape and volume of the underground cavity is an important scientific gap in UCG method which is the main subject of this paper. For this purpose, firstly, a series of equations are introduced to predict the cavity growth dimensions over time. Subsequently, these equations are extended in numerical simulation of the Computational Fluid Dynamics (CFD), incorporating the commercial COMSOL software. According to the simulation, the amount of oxidant necessary to convert a certain amount of coal (in the heterogeneous phase) is calculated. The model results indicated that the shape and volume of cavity could be predicted at the onset of the gasification process. The numerical results agreed well with the field data. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：756 / 765
页数：10
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