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Impact of Domestic Hot Water Systems on District Heating Temperatures

Author

Listed:
  • Tina Lidberg

    (School of Technology and Business Studies, Dalarna University, 791 88 Falun, Sweden)

  • Thomas Olofsson

    (Department of Applied Physics and Electronics, Umea University, 901 87 Umea, Sweden)

  • Louise Ödlund

    (Department of Management and Engineering, Linkoping University, 581 83 Linkoping, Sweden)

Abstract

When buildings become more energy effective, the temperature levels of district heating systems need to be lower to decrease the losses from the distribution system and to keep district heating a competitive alternative on the heating market. For this reason, buildings that are refurbished need to be adapted to suit low-temperature district heating. The aim of this paper is to examine whether four different energy refurbishment packages (ERPs) can be used for lowering the temperature need of a multi-family buildings space heating and domestic hot water (DHW) system as well as to analyse the impact of the DHW circulation system on the return temperature. The results show that for all ERPs examined in this study, the space heating supply temperature agreed well with the temperature levels of a low-temperature district heating system. The results show that the temperature need of the DHW system will determine the supply temperature of the district heating system. In addition, the amount of days with heating demand decreases for all ERPs, which further increases the influence of the DHW system on the district heating system. In conclusion, the DHW system needs to be improved to enable the temperature levels of a low-temperature district heating system.

Suggested Citation

  • Tina Lidberg & Thomas Olofsson & Louise Ödlund, 2019. "Impact of Domestic Hot Water Systems on District Heating Temperatures," Energies, MDPI, vol. 12(24), pages 1-14, December.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:24:p:4694-:d:296070
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    References listed on IDEAS

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    Cited by:

    1. Østergaard, Dorte Skaarup & Smith, Kevin Michael & Tunzi, Michele & Svendsen, Svend, 2022. "Low-temperature operation of heating systems to enable 4th generation district heating: A review," Energy, Elsevier, vol. 248(C).
    2. Thorsen, Jan Eric & Gudmundsson, Oddgeir & Tunzi, Michele & Esbensen, Torben, 2024. "Aftercooling concept: An innovative substation ready for 4th generation district heating networks," Energy, Elsevier, vol. 293(C).
    3. Østergaard, Dorte Skaarup & Tunzi, Michele & Svendsen, Svend, 2021. "What does a well-functioning heating system look like? Investigation of ten Danish buildings that utilize district heating efficiently," Energy, Elsevier, vol. 227(C).
    4. Tahiri, Abdelkarim & Smith, Kevin Michael & Thorsen, Jan Eric & Hviid, Christian Anker & Svendsen, Svend, 2023. "Staged control of domestic hot water storage tanks to support district heating efficiency," Energy, Elsevier, vol. 263(PB).
    5. Toffanin, Riccardo & Curti, Vinicio & Barbato, Maurizio C., 2021. "Impact of Legionella regulation on a 4th generation district heating substation energy use and cost: the case of a Swiss single-family household," Energy, Elsevier, vol. 228(C).
    6. Theofanis Benakopoulos & William Vergo & Michele Tunzi & Robbe Salenbien & Svend Svendsen, 2021. "Overview of Solutions for the Low-Temperature Operation of Domestic Hot-Water Systems with a Circulation Loop," Energies, MDPI, vol. 14(11), pages 1-25, June.

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