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Field measurements on a district heating pipe with vacuum insulation panels

Author

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  • Berge, Axel
  • Hagentoft, Carl-Eric
  • Adl-Zarrabi, Bijan

Abstract

In Swedish district heating networks, around 10% of the supplied thermal energy is lost in the distribution system. One solution to decrease the losses is to use hybrid insulation district heating pipes, a concept where the innermost part of the thermal insulation consists of vacuum insulation panels, held in place by polyurethane foam. One problem with vacuum insulation panels are their sensitivity to high temperatures. This paper presents field measurements on a hybrid insulation district heating pipe where the temperatures have been measured continuously at various positions of a pipe section. The measurements show consistency and a large difference between hybrid insulation parts and reference parts without vacuum insulation panels. A superposition model has been used to calculate the temperature in a point and compare it to the measurement. The results are compared to the same calculation on the results from finite element simulations. The results show clearly that the vacuum panels in the pipes have not collapsed. A slow deterioration of the panels is harder to find with this model. Changes in the system, such as a return temperature which decreases over time, can give a larger impact, concealing the change in the panel performance.

Suggested Citation

  • Berge, Axel & Hagentoft, Carl-Eric & Adl-Zarrabi, Bijan, 2016. "Field measurements on a district heating pipe with vacuum insulation panels," Renewable Energy, Elsevier, vol. 87(P3), pages 1130-1138.
    • Handle: RePEc:eee:renene:v:87:y:2016:i:p3:p:1130-1138
    DOI: 10.1016/j.renene.2015.08.056
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    References listed on IDEAS

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    1. Dalla Rosa, A. & Li, H. & Svendsen, S., 2011. "Method for optimal design of pipes for low-energy district heating, with focus on heat losses," Energy, Elsevier, vol. 36(5), pages 2407-2418.
    2. Reidhav, Charlotte & Werner, Sven, 2008. "Profitability of sparse district heating," Applied Energy, Elsevier, vol. 85(9), pages 867-877, September.
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    Cited by:

    1. Sernhed, Kerstin & Lygnerud, Kristina & Werner, Sven, 2018. "Synthesis of recent Swedish district heating research," Energy, Elsevier, vol. 151(C), pages 126-132.
    2. Li, Yu & Rezgui, Yacine & Zhu, Hanxing, 2017. "District heating and cooling optimization and enhancement – Towards integration of renewables, storage and smart grid," Renewable and Sustainable Energy Reviews, Elsevier, vol. 72(C), pages 281-294.
    3. Jie, Pengfei & Zhao, Wanyue & Li, Fating & Wei, Fengjun & Li, Jing, 2020. "Optimizing the pressure drop per unit length of district heating piping networks from an environmental perspective," Energy, Elsevier, vol. 202(C).

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