THERMAL SCIENCE

International Scientific Journal

Ying Xu

,

Kaijing Zhang

,

Yuanyuan Zhu

,

Shu Chen

,

Shaodong Zhao

,

Xiaoyan Liu

,

Chuan Ma

RESEARCH ON HEAT TRANSFER CHARACTERISTICS OF LONG-DISTANCE PIPE-LINE UNDER SHUTDOWN AND MAINTENANCE CONDITIONS

ABSTRACT
When a long-distance pipeline is shut down for maintenance due to corrosion and damage, the process of cooling down and waxing of crude oil in the pipeline is accompanied by complex phase change heat transfer, and it is important to obtain its temperature drop law to reasonably control the shutdown time and formulate restart plan. In this paper, the heat transfer problem of long-distance pipelines under operation and maintenance conditions was studied and refined. Considering the influence of flow and wax precipitation characteristics of crude oil on heat transfer, a multi-field coupled action model was established and analyzed by numerical simulation in combination with the wide-phase interface partitioning method of crude oil. The evolution of the original flow and temperature fields in the pipeline at typical locations of the maintenance pipeline was revealed, and the reasonable maintenance time was proposed based on the change of liquid phase rate. The research in this thesis refined the heat transfer mechanism of the solidified phase change of crude oil for long-distance pipeline shutdown.
KEYWORDS
Wide phase interface, Three-dimensional buried pipelines, Solidification evolution, Phase change heat transfer, Excavation repair
PAPER SUBMITTED: 2023-10-14
PAPER REVISED: 2023-12-19
PAPER ACCEPTED: 2023-12-27
PUBLISHED ONLINE: 2024-03-10
DOI REFERENCE: https://doi.org/10.2298/TSCI231014061X
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 5, PAGES [3937 - 3949]
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Research on heat transfer characteristics of long-distance pipe-line under shutdown and maintenance conditions

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence