Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Heat transfer analysis of methane hydrate dissociation by depressurization and thermal stimulation | |
Wan, Qing-Cui1,2; Si, Hu1,2; Li, Bo1,2; Li, Gang3
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| 2018-12-01 | |
| Source Publication | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
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| ISSN | 0017-9310 |
| Volume | 127Pages:206-217 |
| Corresponding Author | Si, Hu(sihu@cqu.edu.cn) |
| Abstract | The dissociation of natural gas hydrate is an endothermic reaction closely related with the heat transfer characteristics in porous media. This study mainly focuses on the three-dimensional heat transfer behaviors during hydrate dissociation by depressurization and thermal stimulation based on the experiments in a Cuboid Pressure Vessel (CPV). The evolution of various heat flows (including the heat transferred from the boundaries Q(B), the injected heat from the well Q(inj), the heat consumed by the hydrate dissociation Q(H), and the sensible heat change of the deposit Q(S)) and their relationships during hydrate dissociation are obtained through numerical simulation. The heat loss Q(L) during gas production is calculated and analyzed for the first time. It is found that the hydrate dissociation is mainly promoted by the driving forces of depressurization (F-dep) and thermal stimulation (F-ths), which are dependent on the heat flows of Q(B) and Q(inj), respectively. The effect of F-dep, will be weakened under higher F-ths. Part of Q(inj) and Q(B) are absorbed and stored as Q(S) by the porous media and the fluids of the deposit. Once Q(B) becomes negative, it starts to make contribution to the heat loss instead of the hydrate dissociation, resulting in a sharp increase of Q(L). In addition, a proper thermal stimulation rate q and production pressure P-W, should be selected so that the hydrate dissociation rate could be significantly enhanced while the thermal efficiency and energy efficiency are still favorable when compared with using single depressurization. (C) 2018 Elsevier Ltd. All rights reserved. |
| Keyword | Gas hydrate Heat transfer Depressurization Thermal stimulation Energy efficiency |
| DOI | 10.1016/j.ijheatmasstransfer.2018.07.016 |
| WOS Keyword | INDUCED GAS-PRODUCTION ; PILOT-SCALE ; NATURAL-GAS ; INJECTION ; ENERGY ; CO2 ; DECOMPOSITION ; SIMULATION ; SEPARATION ; DEPOSITS |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51506016] ; Chongqing Foundation and Advanced Research Project[cstc2016jcyjA0034] |
| WOS Research Area | Thermodynamics ; Engineering ; Mechanics |
| Funding Organization | National Natural Science Foundation of China ; Chongqing Foundation and Advanced Research Project |
| WOS Subject | Thermodynamics ; Engineering, Mechanical ; Mechanics |
| WOS ID | WOS:000451366000021 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/24272 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Si, Hu |
| Affiliation | 1.Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400094, Peoples R China 2.Chongqing Univ, Coll Resources & Environm Sci, Chongqing 400094, Peoples R China 3.Chinese Acad Sci, Key Lab Gas Hydrate, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China |
| Recommended Citation GB/T 7714 | Wan, Qing-Cui,Si, Hu,Li, Bo,et al. Heat transfer analysis of methane hydrate dissociation by depressurization and thermal stimulation[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2018,127:206-217. |
| APA | Wan, Qing-Cui,Si, Hu,Li, Bo,&Li, Gang.(2018).Heat transfer analysis of methane hydrate dissociation by depressurization and thermal stimulation.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,127,206-217. |
| MLA | Wan, Qing-Cui,et al."Heat transfer analysis of methane hydrate dissociation by depressurization and thermal stimulation".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 127(2018):206-217. |
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