Heat transfer analysis of methane hydrate dissociation by depressurization and thermal stimulation
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 e...
Published in: | International Journal of Heat and Mass Transfer |
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Online Access: | http://ir.giec.ac.cn/handle/344007/24271 http://ir.giec.ac.cn/handle/344007/24272 https://doi.org/10.1016/j.ijheatmasstransfer.2018.07.016 |
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ftchacadsciegiec:oai:ir.giec.ac.cn:344007/24272 2023-05-15T17:12:09+02:00 Heat transfer analysis of methane hydrate dissociation by depressurization and thermal stimulation Wan, Qing-Cui Si, Hu Li, Bo Li, Gang 2018-12-01 http://ir.giec.ac.cn/handle/344007/24271 http://ir.giec.ac.cn/handle/344007/24272 https://doi.org/10.1016/j.ijheatmasstransfer.2018.07.016 英语 eng PERGAMON-ELSEVIER SCIENCE LTD INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER http://ir.giec.ac.cn/handle/344007/24271 http://ir.giec.ac.cn/handle/344007/24272 doi:10.1016/j.ijheatmasstransfer.2018.07.016 Gas hydrate Heat transfer Depressurization Thermal stimulation Energy efficiency INDUCED GAS-PRODUCTION PILOT-SCALE NATURAL-GAS INJECTION ENERGY CO2 DECOMPOSITION SIMULATION SEPARATION DEPOSITS Thermodynamics Engineering Mechanics Mechanical 期刊论文 2018 ftchacadsciegiec https://doi.org/10.1016/j.ijheatmasstransfer.2018.07.016 2022-09-23T14:15:03Z 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. Report Methane hydrate Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR International Journal of Heat and Mass Transfer 127 206 217 |
institution |
Open Polar |
collection |
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR |
op_collection_id |
ftchacadsciegiec |
language |
English |
topic |
Gas hydrate Heat transfer Depressurization Thermal stimulation Energy efficiency INDUCED GAS-PRODUCTION PILOT-SCALE NATURAL-GAS INJECTION ENERGY CO2 DECOMPOSITION SIMULATION SEPARATION DEPOSITS Thermodynamics Engineering Mechanics Mechanical |
spellingShingle |
Gas hydrate Heat transfer Depressurization Thermal stimulation Energy efficiency INDUCED GAS-PRODUCTION PILOT-SCALE NATURAL-GAS INJECTION ENERGY CO2 DECOMPOSITION SIMULATION SEPARATION DEPOSITS Thermodynamics Engineering Mechanics Mechanical Wan, Qing-Cui Si, Hu Li, Bo Li, Gang Heat transfer analysis of methane hydrate dissociation by depressurization and thermal stimulation |
topic_facet |
Gas hydrate Heat transfer Depressurization Thermal stimulation Energy efficiency INDUCED GAS-PRODUCTION PILOT-SCALE NATURAL-GAS INJECTION ENERGY CO2 DECOMPOSITION SIMULATION SEPARATION DEPOSITS Thermodynamics Engineering Mechanics Mechanical |
description |
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. |
format |
Report |
author |
Wan, Qing-Cui Si, Hu Li, Bo Li, Gang |
author_facet |
Wan, Qing-Cui Si, Hu Li, Bo Li, Gang |
author_sort |
Wan, Qing-Cui |
title |
Heat transfer analysis of methane hydrate dissociation by depressurization and thermal stimulation |
title_short |
Heat transfer analysis of methane hydrate dissociation by depressurization and thermal stimulation |
title_full |
Heat transfer analysis of methane hydrate dissociation by depressurization and thermal stimulation |
title_fullStr |
Heat transfer analysis of methane hydrate dissociation by depressurization and thermal stimulation |
title_full_unstemmed |
Heat transfer analysis of methane hydrate dissociation by depressurization and thermal stimulation |
title_sort |
heat transfer analysis of methane hydrate dissociation by depressurization and thermal stimulation |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
publishDate |
2018 |
url |
http://ir.giec.ac.cn/handle/344007/24271 http://ir.giec.ac.cn/handle/344007/24272 https://doi.org/10.1016/j.ijheatmasstransfer.2018.07.016 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER http://ir.giec.ac.cn/handle/344007/24271 http://ir.giec.ac.cn/handle/344007/24272 doi:10.1016/j.ijheatmasstransfer.2018.07.016 |
op_doi |
https://doi.org/10.1016/j.ijheatmasstransfer.2018.07.016 |
container_title |
International Journal of Heat and Mass Transfer |
container_volume |
127 |
container_start_page |
206 |
op_container_end_page |
217 |
_version_ |
1766068939665702912 |