This article has been reviewed according to Science X's editorial process and policies. Editors have highlighted the following attributes while ensuring the content's credibility:

fact-checked

trusted source

proofread

Novel air-cooling pipeline embankment prevents permafrost thaw disasters for buried warm-oil pipelines

pipeline
Credit: Unsplash/CC0 Public Domain

During the operation of the China-Russia Crude Oil Pipeline (CRCOP), underground pipelines crossing permafrost regions often face challenges including frost heave, thaw settlement, and other permafrost disasters. In addition, the oil temperature of the CRCOP has been steadily increasing over the years. Therefore, effective mitigation of thaw settlement disasters caused by high oil temperature has become paramount for ensure the stable operation of the CRCOP.

A research team led by Li Guoyu from the Northwest Institute of Eco-Environment and Resources of the Chinese Academy of Sciences presented a novel inverted T-shaped crushed-rock pipeline embankment (ITCPE) structure that utilizes the inherent heat of the pipe to enhance convection, thereby more efficiently dissipating heat from the pipeline and cooling the permafrost. Results were published in the journal Energy.

The researchers conducted long-term numerical predictions to evaluate the thermal effects of the ITCPE, unprotected pipeline embankment (UPE), and traditional horizontal crushed-rock pipeline embankment (THCPE) structures during pipeline operation.

The results show that neither the insulated buried pipeline structure, nor the UPE, nor the THCPE adequately address the . However, the novel ITCPE structure demonstrates remarkable effectiveness in mitigating thaw settlement, which significantly maintains the artificial permafrost table beneath the pipeline embankment over a 50-year operational period.

This study not only provides valuable technical support to the CRCOP, but also offers guidance for the design and maintenance of projects in regions worldwide.

More information: Yapeng Cao et al, Thaw bulb formation surrounding warm-oil pipelines and evaluation of the cooling performance of a new air convection pipeline embankment structure, Energy (2024). DOI: 10.1016/j.energy.2024.130668

Citation: Novel air-cooling pipeline embankment prevents permafrost thaw disasters for buried warm-oil pipelines (2024, April 8) retrieved 19 May 2024 from https://techxplore.com/news/2024-04-air-cooling-pipeline-embankment-permafrost.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

Explore further

New mitigation structure assists in protecting permafrost of Tibet Plateau

1 shares

Feedback to editors