Proposal of a New Method for Controlling the Thaw of Permafrost around the China–Russia Crude Oil Pipeline and a Preliminary Study of Its Ventilation Capacity
The China–Russia crude oil pipeline (CRCOP) has been in operation for over ten years. Field observation results have shown that a thaw bulb has developed around the CRCOP which expands at a rate of more than 0.8 m∙a−1 in depth. In view of the deficits of existing measures in mitigating permafrost th...
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ftmdpi:oai:mdpi.com:/2073-4441/13/20/2908/ 2023-08-20T04:09:10+02:00 Proposal of a New Method for Controlling the Thaw of Permafrost around the China–Russia Crude Oil Pipeline and a Preliminary Study of Its Ventilation Capacity Yapeng Cao Guoyu Li Gang Wu Dun Chen Kai Gao Liyun Tang Hailiang Jia Fuqiang Che agris 2021-10-16 application/pdf https://doi.org/10.3390/w13202908 EN eng Multidisciplinary Digital Publishing Institute Water and Climate Change https://dx.doi.org/10.3390/w13202908 https://creativecommons.org/licenses/by/4.0/ Water; Volume 13; Issue 20; Pages: 2908 China–Russia crude oil pipeline permafrost engineering climate warming thaw settlement air-ventilated pipe convective heat transfer Text 2021 ftmdpi https://doi.org/10.3390/w13202908 2023-08-01T02:58:38Z The China–Russia crude oil pipeline (CRCOP) has been in operation for over ten years. Field observation results have shown that a thaw bulb has developed around the CRCOP which expands at a rate of more than 0.8 m∙a−1 in depth. In view of the deficits of existing measures in mitigating permafrost thaw, a new control method is proposed based on active cooling. According to the relationship between total pressure loss and the driving force of natural ventilation, the wind speed in a U-shaped air-ventilation pipe around the CRCOP is calculated. By analyzing the theoretical calculation and numerical analysis results, it is found that the influence of thermal pressure difference on the natural ventilation of the structure can be negligible, and the influences of resistance loss along the pipe and local resistance loss in the pipe are similarly negligible. Exhaust elbows greatly improve the ventilation performance of the U-shaped air-ventilated pipe. This study developed a novel structure around warm-oil pipelines in permafrost for mitigating thaw settlement along the CRCOP and other similar projects across the world. Text permafrost MDPI Open Access Publishing Water 13 20 2908 |
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Open Polar |
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MDPI Open Access Publishing |
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ftmdpi |
language |
English |
topic |
China–Russia crude oil pipeline permafrost engineering climate warming thaw settlement air-ventilated pipe convective heat transfer |
spellingShingle |
China–Russia crude oil pipeline permafrost engineering climate warming thaw settlement air-ventilated pipe convective heat transfer Yapeng Cao Guoyu Li Gang Wu Dun Chen Kai Gao Liyun Tang Hailiang Jia Fuqiang Che Proposal of a New Method for Controlling the Thaw of Permafrost around the China–Russia Crude Oil Pipeline and a Preliminary Study of Its Ventilation Capacity |
topic_facet |
China–Russia crude oil pipeline permafrost engineering climate warming thaw settlement air-ventilated pipe convective heat transfer |
description |
The China–Russia crude oil pipeline (CRCOP) has been in operation for over ten years. Field observation results have shown that a thaw bulb has developed around the CRCOP which expands at a rate of more than 0.8 m∙a−1 in depth. In view of the deficits of existing measures in mitigating permafrost thaw, a new control method is proposed based on active cooling. According to the relationship between total pressure loss and the driving force of natural ventilation, the wind speed in a U-shaped air-ventilation pipe around the CRCOP is calculated. By analyzing the theoretical calculation and numerical analysis results, it is found that the influence of thermal pressure difference on the natural ventilation of the structure can be negligible, and the influences of resistance loss along the pipe and local resistance loss in the pipe are similarly negligible. Exhaust elbows greatly improve the ventilation performance of the U-shaped air-ventilated pipe. This study developed a novel structure around warm-oil pipelines in permafrost for mitigating thaw settlement along the CRCOP and other similar projects across the world. |
format |
Text |
author |
Yapeng Cao Guoyu Li Gang Wu Dun Chen Kai Gao Liyun Tang Hailiang Jia Fuqiang Che |
author_facet |
Yapeng Cao Guoyu Li Gang Wu Dun Chen Kai Gao Liyun Tang Hailiang Jia Fuqiang Che |
author_sort |
Yapeng Cao |
title |
Proposal of a New Method for Controlling the Thaw of Permafrost around the China–Russia Crude Oil Pipeline and a Preliminary Study of Its Ventilation Capacity |
title_short |
Proposal of a New Method for Controlling the Thaw of Permafrost around the China–Russia Crude Oil Pipeline and a Preliminary Study of Its Ventilation Capacity |
title_full |
Proposal of a New Method for Controlling the Thaw of Permafrost around the China–Russia Crude Oil Pipeline and a Preliminary Study of Its Ventilation Capacity |
title_fullStr |
Proposal of a New Method for Controlling the Thaw of Permafrost around the China–Russia Crude Oil Pipeline and a Preliminary Study of Its Ventilation Capacity |
title_full_unstemmed |
Proposal of a New Method for Controlling the Thaw of Permafrost around the China–Russia Crude Oil Pipeline and a Preliminary Study of Its Ventilation Capacity |
title_sort |
proposal of a new method for controlling the thaw of permafrost around the china–russia crude oil pipeline and a preliminary study of its ventilation capacity |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/w13202908 |
op_coverage |
agris |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Water; Volume 13; Issue 20; Pages: 2908 |
op_relation |
Water and Climate Change https://dx.doi.org/10.3390/w13202908 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/w13202908 |
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Water |
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13 |
container_issue |
20 |
container_start_page |
2908 |
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1774721962659020800 |