李维仲

个人信息Personal Information

教授

博士生导师

硕士生导师

性别:男

毕业院校:Nottingham trent University

学位:博士

所在单位:能源与动力学院

学科:制冷及低温工程. 工程热物理. 热能工程

办公地点:能动学院新大楼822室

联系方式:wzhongli@dlut.edu.cn

电子邮箱:wzhongli@dlut.edu.cn

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Numerical Studies of Methane Gas Production from Hydrate Decomposition by Depressurization in porous media

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论文类型:会议论文

发表时间:2016-10-08

收录刊物:EI、CPCI-S

卷号:105

页面范围:250-255

关键字:Methane hydrate; decomposition; ice generating; Mathematic model; Numerical simulation

摘要:As a kind of potential new sources of energy, the dissociation processes of gas hydrates using the depressurization method has been investigated by experimental observations and numerical simulations. In this study, on the basis of summarizing the existing model, a one-dimensional mathematical model containing four phase (water phase, gas phase, hydrate phase, ice phase) and three constituents (water, gas, hydrate) using the finite difference method (FDM) was established for methane hydrates decomposition by depressurization in porous media. This paper focuses on the ice generation and distribution characteristics through changing the parameters of the relevant settings, and analyzes the effect of ice generation on the pressure, temperature, permeability, cumulative gas production and other parameters. The results show that, generation of ice increases gradually in the hydrates decomposition process, and occurred early near the side area because of the large pressure gradient. The absolute permeability and instantaneous gas generation rate at the early stage decline with ice generation, and the local pressure rise. (C) 2017 The Authors. Published by Elsevier Ltd.