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Energy-consumption and economic analysis of group and building substation systems — A case study of the reformation of the district heating system in China

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  • Wang, Peng
  • Sipilä, Kari

Abstract

Group substations have dominated district heating (DH) systems in China so far. In order to explore the applicability of building substations to DH systems in China, the case study has been carried out in Ulanhot, by comprehensively comparing the energy consumptions and costs of group and building substation systems. Firstly, building simulation is used to help design the substations and DH networks, and analyze the operation considering variable flow and holiday control, which revealed the energy-saving advantages and flexibility of the building substation system. Secondly, the structure of the outdoor network in the building substation system is redesigned using the results of building simulation. Then, the total energy consumption of the group and building substation systems, including heating energy, pumping energy, and heat loss, is simulated and compared, considering the regulation of the water temperature. According to the operation data of the group substation system in the last two heating periods, the relative error of the simulated total energy was −6.8%. Finally, the annual cost method is employed for the economic analysis, which shows the superiority of the building substation system with annual cost reductions ranging between 5.7 and 5.9% for a lifetime range of 10–30 years.

Suggested Citation

  • Wang, Peng & Sipilä, Kari, 2016. "Energy-consumption and economic analysis of group and building substation systems — A case study of the reformation of the district heating system in China," Renewable Energy, Elsevier, vol. 87(P3), pages 1139-1147.
    • Handle: RePEc:eee:renene:v:87:y:2016:i:p3:p:1139-1147
    DOI: 10.1016/j.renene.2015.08.070
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    References listed on IDEAS

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    1. Persson, Urban & Werner, Sven, 2011. "Heat distribution and the future competitiveness of district heating," Applied Energy, Elsevier, vol. 88(3), pages 568-576, March.
    2. Shu, Haiwen & Duanmu, Lin & Zhang, Chaohui & Zhu, Yingxin, 2010. "Study on the decision-making of district cooling and heating systems by means of value engineering," Renewable Energy, Elsevier, vol. 35(9), pages 1929-1939.
    3. Gadd, Henrik & Werner, Sven, 2013. "Heat load patterns in district heating substations," Applied Energy, Elsevier, vol. 108(C), pages 176-183.
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    1. Sayegh, M.A. & Danielewicz, J. & Nannou, T. & Miniewicz, M. & Jadwiszczak, P. & Piekarska, K. & Jouhara, H., 2017. "Trends of European research and development in district heating technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 68(P2), pages 1183-1192.
    2. Persson, Urban & Wiechers, Eva & Möller, Bernd & Werner, Sven, 2019. "Heat Roadmap Europe: Heat distribution costs," Energy, Elsevier, vol. 176(C), pages 604-622.

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