Improving thermal performance of an existing UK district heat network: a case for temperature optimization

Michele Tunzi*, Rabah Boukhanouf, Hongwei Li, Svend Svendsen, Anton Ianakiev

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

This paper presents results of a research study into improving energy performance of small-scale district heat network through water supply and return temperature optimization technique. The case study involves establishing the baseline heat demand of the estate’s buildings, benchmarking the existing heat network operating parameters, and defining the optimum supply and return temperature. A stepwise temperature optimization technique of plate radiators heat emitters was applied to control the buildings indoor thermal comfort using night set back temperature strategy of 21/18 °C. It was established that the heat network return temperature could be lowered from the current measured average of 55 °C to 35.6 °C, resulting in overall reduction of heat distribution losses and fuel consumption of 10% and 9% respectively. Hence, the study demonstrates the potential of operating existing heat networks at optimum performance and achieving lower return temperature. It was also pointed out that optimal operation of future low temperature district heat networks will require close engagement between the operator and the end user through incentives of mutual benefit.
Original languageEnglish
JournalEnergy and Buildings
Volume158
Pages (from-to)1576-1585
ISSN0378-7788
DOIs
Publication statusPublished - 2018

Keywords

  • Plate radiators
  • Temperature optimization
  • Low temperature district heating
  • Heat network modelling

Cite this

Tunzi, Michele ; Boukhanouf, Rabah ; Li, Hongwei ; Svendsen, Svend ; Ianakiev, Anton. / Improving thermal performance of an existing UK district heat network: a case for temperature optimization. In: Energy and Buildings. 2018 ; Vol. 158. pp. 1576-1585.
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abstract = "This paper presents results of a research study into improving energy performance of small-scale district heat network through water supply and return temperature optimization technique. The case study involves establishing the baseline heat demand of the estate’s buildings, benchmarking the existing heat network operating parameters, and defining the optimum supply and return temperature. A stepwise temperature optimization technique of plate radiators heat emitters was applied to control the buildings indoor thermal comfort using night set back temperature strategy of 21/18 °C. It was established that the heat network return temperature could be lowered from the current measured average of 55 °C to 35.6 °C, resulting in overall reduction of heat distribution losses and fuel consumption of 10{\%} and 9{\%} respectively. Hence, the study demonstrates the potential of operating existing heat networks at optimum performance and achieving lower return temperature. It was also pointed out that optimal operation of future low temperature district heat networks will require close engagement between the operator and the end user through incentives of mutual benefit.",
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author = "Michele Tunzi and Rabah Boukhanouf and Hongwei Li and Svend Svendsen and Anton Ianakiev",
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Improving thermal performance of an existing UK district heat network: a case for temperature optimization. / Tunzi, Michele; Boukhanouf, Rabah; Li, Hongwei; Svendsen, Svend ; Ianakiev, Anton.

In: Energy and Buildings, Vol. 158, 2018, p. 1576-1585.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Improving thermal performance of an existing UK district heat network: a case for temperature optimization

AU - Tunzi, Michele

AU - Boukhanouf, Rabah

AU - Li, Hongwei

AU - Svendsen, Svend

AU - Ianakiev, Anton

PY - 2018

Y1 - 2018

N2 - This paper presents results of a research study into improving energy performance of small-scale district heat network through water supply and return temperature optimization technique. The case study involves establishing the baseline heat demand of the estate’s buildings, benchmarking the existing heat network operating parameters, and defining the optimum supply and return temperature. A stepwise temperature optimization technique of plate radiators heat emitters was applied to control the buildings indoor thermal comfort using night set back temperature strategy of 21/18 °C. It was established that the heat network return temperature could be lowered from the current measured average of 55 °C to 35.6 °C, resulting in overall reduction of heat distribution losses and fuel consumption of 10% and 9% respectively. Hence, the study demonstrates the potential of operating existing heat networks at optimum performance and achieving lower return temperature. It was also pointed out that optimal operation of future low temperature district heat networks will require close engagement between the operator and the end user through incentives of mutual benefit.

AB - This paper presents results of a research study into improving energy performance of small-scale district heat network through water supply and return temperature optimization technique. The case study involves establishing the baseline heat demand of the estate’s buildings, benchmarking the existing heat network operating parameters, and defining the optimum supply and return temperature. A stepwise temperature optimization technique of plate radiators heat emitters was applied to control the buildings indoor thermal comfort using night set back temperature strategy of 21/18 °C. It was established that the heat network return temperature could be lowered from the current measured average of 55 °C to 35.6 °C, resulting in overall reduction of heat distribution losses and fuel consumption of 10% and 9% respectively. Hence, the study demonstrates the potential of operating existing heat networks at optimum performance and achieving lower return temperature. It was also pointed out that optimal operation of future low temperature district heat networks will require close engagement between the operator and the end user through incentives of mutual benefit.

KW - Plate radiators

KW - Temperature optimization

KW - Low temperature district heating

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