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

Peng Wang (Corresponding Author), Kari Sipilä

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)1139-1147
JournalRenewable Energy
Volume87
Issue numberPart 3
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

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District heating
Economic analysis
Energy utilization
Heating
Cost reduction
Heat losses
Costs
Energy dissipation
Energy conservation
Water
Temperature

Keywords

  • building simulation
  • distric heating
  • district heating
  • economic analysis
  • energy consumption
  • substation

Cite this

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title = "Energy-consumption and economic analysis of group and building substation systems : a case study of the reformation of the district heating system in China",
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.",
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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. / Wang, Peng (Corresponding Author); Sipilä, Kari.

In: Renewable Energy, Vol. 87, No. Part 3, 2016, p. 1139-1147.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Energy-consumption and economic analysis of group and building substation systems : a case study of the reformation of the district heating system in China

AU - Wang, Peng

AU - Sipilä, Kari

PY - 2016

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N2 - 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.

AB - 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.

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KW - district heating

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KW - energy consumption

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