Optimized design of large-diameter directly buried heating pipe

The elbow of a large-diameter directly buried hot water heating pipeline is the weak part of the whole pipe system. The foam cushion is often used to reduce the stress on the elbow. However, the foam cushion raises the temperature on the outer protective pipe’s surface, which may trigger thermal str...

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Bibliographic Details
Published in:Journal of physics. Conference series 2024-06, Vol.2782 (1), p.12034
Main Authors: Tang, Chang, Yue, Song, Qu, Mingxin, Li, Kun, Zhang, Yifan
Format: Article
Language:English
Subjects:
Buried pipes
Cushions
Heat pipes
High temperature
Hot water heating
Insulation
Pipe bends
Thermal simulation
Thermal stress
Water heating
Yield stress
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Summary:The elbow of a large-diameter directly buried hot water heating pipeline is the weak part of the whole pipe system. The foam cushion is often used to reduce the stress on the elbow. However, the foam cushion raises the temperature on the outer protective pipe’s surface, which may trigger thermal stress damage to the pipes. In this paper, the insulating pipe at the elbow section is designed with a variable diameter. The numerical simulation of the thermal stress for the outer protective pipe and the working pipe was conducted. The maximum stress for the outer protective pipe is about 3 MPa, and the average stress for the working pipe is 83 MPa, much smaller than the yield stress. Combined with the simulation results, the design ensures the reliability of the elbow and provides a reference for the design of large-diameter and high-temperature heat transfer pipelines.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2782/1/012034