Estimating static heat flows in buildings for energy allocation systems

Jouko Pakanen (Corresponding Author), Sami Karjalainen

Research output: Contribution to journalArticleScientificpeer-review

29 Citations (Scopus)

Abstract

An energy cost allocation system records the energy consumption of a building and divides the overall energy costs between the flats. Because the indoor temperatures of rooms are usually not equal, static heat flows between flats cannot be avoided. Hence, in order to ensure fair energy costs per flat the system should be able to determine the static heat flows, preferably without utilising in situ measurements. This paper presents a new method for estimating static heat flows between neighbouring rooms. The approach is theoretical, focusing only on heat transfer issues. Energy cost allocation is not considered.

The approach is based on the parametric model describing thermal behaviour of an occupied space. The model is created for each room of a building. Parameter values are identified using real-time measurements collected by a building automation system from each room and its environment. The tuning of parameters takes a few days using a 15-min sampling time. A prerequisite for successful system identification is the overall control of the room temperatures. All test runs are performed in a simulated office hotel using the TRNSYS simulation program. The results are encouraging, but further research is needed, especially in a real building environment.
Original languageEnglish
Pages (from-to)1044-1052
Number of pages9
JournalEnergy and Buildings
Volume38
Issue number9
DOIs
Publication statusPublished - 2006
MoE publication typeA1 Journal article-refereed

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Heat transfer
Costs
Hotels
Time measurement
Identification (control systems)
Energy utilization
Automation
Tuning
Sampling
Temperature
Hot Temperature

Keywords

  • buildings
  • heat flows
  • energy consumption
  • heating
  • parametric models
  • building automation
  • measurement
  • simulation
  • energy costs

Cite this

Pakanen, Jouko ; Karjalainen, Sami. / Estimating static heat flows in buildings for energy allocation systems. In: Energy and Buildings. 2006 ; Vol. 38, No. 9. pp. 1044-1052.
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Estimating static heat flows in buildings for energy allocation systems. / Pakanen, Jouko (Corresponding Author); Karjalainen, Sami.

In: Energy and Buildings, Vol. 38, No. 9, 2006, p. 1044-1052.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Karjalainen, Sami

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N2 - An energy cost allocation system records the energy consumption of a building and divides the overall energy costs between the flats. Because the indoor temperatures of rooms are usually not equal, static heat flows between flats cannot be avoided. Hence, in order to ensure fair energy costs per flat the system should be able to determine the static heat flows, preferably without utilising in situ measurements. This paper presents a new method for estimating static heat flows between neighbouring rooms. The approach is theoretical, focusing only on heat transfer issues. Energy cost allocation is not considered.The approach is based on the parametric model describing thermal behaviour of an occupied space. The model is created for each room of a building. Parameter values are identified using real-time measurements collected by a building automation system from each room and its environment. The tuning of parameters takes a few days using a 15-min sampling time. A prerequisite for successful system identification is the overall control of the room temperatures. All test runs are performed in a simulated office hotel using the TRNSYS simulation program. The results are encouraging, but further research is needed, especially in a real building environment.

AB - An energy cost allocation system records the energy consumption of a building and divides the overall energy costs between the flats. Because the indoor temperatures of rooms are usually not equal, static heat flows between flats cannot be avoided. Hence, in order to ensure fair energy costs per flat the system should be able to determine the static heat flows, preferably without utilising in situ measurements. This paper presents a new method for estimating static heat flows between neighbouring rooms. The approach is theoretical, focusing only on heat transfer issues. Energy cost allocation is not considered.The approach is based on the parametric model describing thermal behaviour of an occupied space. The model is created for each room of a building. Parameter values are identified using real-time measurements collected by a building automation system from each room and its environment. The tuning of parameters takes a few days using a 15-min sampling time. A prerequisite for successful system identification is the overall control of the room temperatures. All test runs are performed in a simulated office hotel using the TRNSYS simulation program. The results are encouraging, but further research is needed, especially in a real building environment.

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KW - simulation

KW - energy costs

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