Energy performance evaluation of a nearly Zero Energy Building and the reasons for the performance gap between expected and actual building operation

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Resumé

As energy standards focus on reducing energy use in new buildings, attention is drawn to the gap between the expected and actual building operation and energy performance. This performance gap can be associated with the building construction, its systems, its unbalanced operation, the assumptions on occupancy profiles during the design phase, or the users’ interaction with the systems’ operation and control. This work focuses on a nearly zero-energy (nZEB) single-family house located in central Denmark. The analysis of indoor environment and energy use is based on year-long data monitoring. The reasons for the deviation between the expected and actual energy use are suggested. The indoor environmental quality is analyzed to verify the compliance with the standards. The European recommendation for the yearly primary energy use of new single-family houses is 50 – 65 kWh/m2. For the current case, the simulation tool Be18 gives a result of 30.8 kWh/m2 for the design phase. However, the actual energy use is measured to be 58.2 kWh/m2. The sensibility of nZEBs to such imbalances can lead to houses that do not function as intended. It is thus crucial to investigate further the causes of these disparities in order to bridge the gap between expected and final energy use in dwellings.
OriginalsprogEngelsk
Titel1st Nordic conference on Zero Emission and Plus Energy Buildings 2019 : IOP Conf. Series: Earth and Environmental Science 352 (2019) 012017
Publikationsdatonov. 2019
DOI
StatusUdgivet - nov. 2019
Begivenhed1st Nordic conference on Zero Emission and Plus Energy Buildings - Trondheim, Norge
Varighed: 6 nov. 20197 nov. 2019
https://www.ntnu.edu/nordic-zeb-2019

Konference

Konference1st Nordic conference on Zero Emission and Plus Energy Buildings
LandNorge
ByTrondheim
Periode06/11/201907/11/2019
Internetadresse

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Monitoring
Compliance

Citer dette

Loukou, E., Heiselberg, P., Jensen, R. L., & Johra, H. (2019). Energy performance evaluation of a nearly Zero Energy Building and the reasons for the performance gap between expected and actual building operation. I 1st Nordic conference on Zero Emission and Plus Energy Buildings 2019: IOP Conf. Series: Earth and Environmental Science 352 (2019) 012017 https://doi.org/doi:10.1088/1755-1315/352/1/012017
Loukou, Evangelia ; Heiselberg, Per ; Jensen, Rasmus Lund ; Johra, Hicham. / Energy performance evaluation of a nearly Zero Energy Building and the reasons for the performance gap between expected and actual building operation. 1st Nordic conference on Zero Emission and Plus Energy Buildings 2019: IOP Conf. Series: Earth and Environmental Science 352 (2019) 012017. 2019.
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title = "Energy performance evaluation of a nearly Zero Energy Building and the reasons for the performance gap between expected and actual building operation",
abstract = "As energy standards focus on reducing energy use in new buildings, attention is drawn to the gap between the expected and actual building operation and energy performance. This performance gap can be associated with the building construction, its systems, its unbalanced operation, the assumptions on occupancy profiles during the design phase, or the users’ interaction with the systems’ operation and control. This work focuses on a nearly zero-energy (nZEB) single-family house located in central Denmark. The analysis of indoor environment and energy use is based on year-long data monitoring. The reasons for the deviation between the expected and actual energy use are suggested. The indoor environmental quality is analyzed to verify the compliance with the standards. The European recommendation for the yearly primary energy use of new single-family houses is 50 – 65 kWh/m2. For the current case, the simulation tool Be18 gives a result of 30.8 kWh/m2 for the design phase. However, the actual energy use is measured to be 58.2 kWh/m2. The sensibility of nZEBs to such imbalances can lead to houses that do not function as intended. It is thus crucial to investigate further the causes of these disparities in order to bridge the gap between expected and final energy use in dwellings.",
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Loukou, E, Heiselberg, P, Jensen, RL & Johra, H 2019, Energy performance evaluation of a nearly Zero Energy Building and the reasons for the performance gap between expected and actual building operation. i 1st Nordic conference on Zero Emission and Plus Energy Buildings 2019: IOP Conf. Series: Earth and Environmental Science 352 (2019) 012017. 1st Nordic conference on Zero Emission and Plus Energy Buildings, Trondheim, Norge, 06/11/2019. https://doi.org/doi:10.1088/1755-1315/352/1/012017

Energy performance evaluation of a nearly Zero Energy Building and the reasons for the performance gap between expected and actual building operation. / Loukou, Evangelia; Heiselberg, Per; Jensen, Rasmus Lund; Johra, Hicham.

1st Nordic conference on Zero Emission and Plus Energy Buildings 2019: IOP Conf. Series: Earth and Environmental Science 352 (2019) 012017. 2019.

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

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AB - As energy standards focus on reducing energy use in new buildings, attention is drawn to the gap between the expected and actual building operation and energy performance. This performance gap can be associated with the building construction, its systems, its unbalanced operation, the assumptions on occupancy profiles during the design phase, or the users’ interaction with the systems’ operation and control. This work focuses on a nearly zero-energy (nZEB) single-family house located in central Denmark. The analysis of indoor environment and energy use is based on year-long data monitoring. The reasons for the deviation between the expected and actual energy use are suggested. The indoor environmental quality is analyzed to verify the compliance with the standards. The European recommendation for the yearly primary energy use of new single-family houses is 50 – 65 kWh/m2. For the current case, the simulation tool Be18 gives a result of 30.8 kWh/m2 for the design phase. However, the actual energy use is measured to be 58.2 kWh/m2. The sensibility of nZEBs to such imbalances can lead to houses that do not function as intended. It is thus crucial to investigate further the causes of these disparities in order to bridge the gap between expected and final energy use in dwellings.

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Loukou E, Heiselberg P, Jensen RL, Johra H. Energy performance evaluation of a nearly Zero Energy Building and the reasons for the performance gap between expected and actual building operation. I 1st Nordic conference on Zero Emission and Plus Energy Buildings 2019: IOP Conf. Series: Earth and Environmental Science 352 (2019) 012017. 2019 https://doi.org/doi:10.1088/1755-1315/352/1/012017