Reducing heat losses from aging district heating pipes by using cured-in-place pipe liners

Mengke Jing, Shujie Zhang, Lisong Fu, Guoquan Cao and Rui Wang

Energy, 2023, vol. 273, issue C

Abstract: Low heat losses from district heating (DH) networks significant for efficient energy utilization and carbon emission reduction. However, the additional heat loss due to the aging of DH pipes is a serious challenge. Usually, it needs to be solved by pipe refurbishment. The novelty of this paper is that a new strategy was proposed: using cured-in-place pipe (CIPP) liners. This strategy can realize pipe maintenance without pipe refurbishment and large excavations. It has advantages in economic and social cost. After that, a new CIPP liner with an enhanced insulation function was designed to support this strategy. The obtained CIPP liner exhibited a variety of advantages, including low thermal conductivity, high mechanical properties, low water absorption and high thermal stability. Finally, a numerical simulation verified the effectiveness of the liner. The effect of using CIPP liners was affected by the liner parameters and working conditions. Based on a set of parameters, the liner reduced the heat loss of the aged pipe by 55.4%. This work provides a new perspective for the maintenance of DH pipes and contributes to the energy conservation of DH networks.

Keywords: District heating; Cured-in-place pipe; Heat loss; Trenchless (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:273:y:2023:i:c:s0360544223006540

DOI: 10.1016/j.energy.2023.127260

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