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Domestic hot water systems in well-insulated residential buildings: A comparative simulation study on efficiency and hygiene challenges

Author

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  • Graf, Christopher
  • Pärisch, Peter
  • Marszal-Pomianowska, Anna
  • Frandsen, Martin
  • Bendinger, Bernd
  • Cadenbach, Anna

Abstract

Domestic hot water (DHW) is essential for daily life, yet the production can be energy intensive. Advances in building insulation reduced space heating demand, while DHW energy demand remained constant or even increased. The need for a higher proportion of renewable heat amplifies the conflict in DHW systems between energy efficiency, hygiene, and comfort, since high temperatures are required for hygienic purposes. Thus, developing DHW systems efficiently utilising renewable heat without excessive temperature requirements is essential.

Suggested Citation

  • Graf, Christopher & Pärisch, Peter & Marszal-Pomianowska, Anna & Frandsen, Martin & Bendinger, Bernd & Cadenbach, Anna, 2024. "Domestic hot water systems in well-insulated residential buildings: A comparative simulation study on efficiency and hygiene challenges," Energy, Elsevier, vol. 313(C).
    • Handle: RePEc:eee:energy:v:313:y:2024:i:c:s0360544224033656
    DOI: 10.1016/j.energy.2024.133587
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    References listed on IDEAS

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    1. Graf, Christopher & Cadenbach, Anna, 2025. "Domestic hot water in existing residential buildings: Comparative simulation study of efficiency and hygiene challenges," Energy, Elsevier, vol. 337(C).
    2. Siuta-Olcha, Alicja & Cholewa, Tomasz & Bocian, Martyna & Modrzyńska, Emilia & Gnieciak, Maciej, 2025. "Influence of operation of the domestic hot water system on the return temperature in the district heating network," Energy, Elsevier, vol. 334(C).
    3. Sun, Chang & Feng, Lianyuan & Chen, Yu & Ju, Xiaolei & Zhao, Tianyi, 2026. "Renewable energy for domestic hot water production: Advances, challenges, and future directions - A systematic review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 226(PB).

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