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The ground impact on the ultra-low- and low-temperature district heating operation

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  • Dolna, Oktawia
  • Mikielewicz, Jarosław

Abstract

According to the latest trends in the district heating field, new technologies and solutions are being implemented aiming at lower heating medium supply temperature introduction. This paper presents the implementation the Ultra-Low- and Low-Temperature District Heating (UL-L- TDH) and the ground thermal energy storage (GTES). The GTES is localised in the UL-L- TDH distribution pipes surrounding. In the paper there have been estimated the internal and external thermal energy balances of a system including the heat supplier, the heat consumer and the UL-L- TDH distribution pipes. A simple mathematical model of the system mentioned above was prepared and solved numerically using Mathcad environment. Additionally, CFD studies have been carried out to visualise the temperature field in the GTES. Accordingly, the influence of the GTES on the Ultra-Low- and Low-Temperature District Heating operation was estimated. Additionally, basing on the CFD results the proper supply/return mutual distance was defined.

Suggested Citation

  • Dolna, Oktawia & Mikielewicz, Jarosław, 2020. "The ground impact on the ultra-low- and low-temperature district heating operation," Renewable Energy, Elsevier, vol. 146(C), pages 1232-1241.
    • Handle: RePEc:eee:renene:v:146:y:2020:i:c:p:1232-1241
    DOI: 10.1016/j.renene.2019.07.048
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    References listed on IDEAS

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    1. Brand, Marek & Thorsen, Jan Eric & Svendsen, Svend, 2012. "Numerical modelling and experimental measurements for a low-temperature district heating substation for instantaneous preparation of DHW with respect to service pipes," Energy, Elsevier, vol. 41(1), pages 392-400.
    2. Persson, Urban & Werner, Sven, 2011. "Heat distribution and the future competitiveness of district heating," Applied Energy, Elsevier, vol. 88(3), pages 568-576, March.
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    Cited by:

    1. Dolna, Oktawia, 2021. "Operation of a ground thermal energy storage supplied by different sources in a low-temperature district heating network," Renewable Energy, Elsevier, vol. 180(C), pages 586-604.
    2. Quirosa, Gonzalo & Torres, Miguel & Becerra, José A. & Jiménez-Espadafor, Francisco J. & Chacartegui, Ricardo, 2023. "Energy analysis of an ultra-low temperature district heating and cooling system with coaxial borehole heat exchangers," Energy, Elsevier, vol. 278(PA).
    3. Xu, Qian & Wang, Kang & Zou, Zhenwei & Zhong, Liqiong & Akkurt, Nevzat & Feng, Junxiao & Xiong, Yaxuan & Han, Jingxiao & Wang, Jiulong & Du, Yanping, 2021. "A new type of two-supply, one-return, triple pipe-structured heat loss model based on a low temperature district heating system," Energy, Elsevier, vol. 218(C).

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