Energy and indoor climate measurements in Denmark’s first energy neutral block of flats

Kim B. Wittchen, Søren Østergaard Jensen

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Resumé

Denmark’s first energy neutral multi-family house, BOLIG+, is constructed at Søborg near Copenhagen and consists of 10 flats divided on 4 floors. BOLIG+ was the first attempt to construct a multi-family block of flats that complies with a set of criteria and dogmas that defines the BOLIG+ concept. Energy production on the building needed e.g. to meet not only the buildings energy demand, but also the residents’ electricity energy use for light and appliances. Building multi-family houses that are energy neutral on annual basis, is, therefore, much more difficult than for a single-family house. One of the reasons for this is the small amount of roof area available (per. dwelling) for local electricity production compared to the roof area of a single-family house. Additionally, energy “sold” to the grid should have at least the same exergy level as energy “bought” from the grid. Last, but not least, the buildings was constructed under normal economical market conditions, i.e. without any subsidies for the construction.
When designing the building, the normal standard conditions for calculating the buildings energy performance was offset in order to ensure better coherence between the design energy demand and the following energy measurements. The indoor temperature was set higher, and so was the domestic hot water demand. Additionally, free loads (gains) from persons, light and appliances was set lower than the standard.

To meet the goal of being energy neutral, several low-energy solutions are used e.g. compact thermal envelope; highly insulated constructions; highly insulating windows; hybrid decentral ventilation; heat recovery on grey wastewater; PV on facade and roof; buffer zones. Additionally, an electric battery was installed to improve the economy of the PV installation by optimizing the amount of electricity used inside the meter (tackling the feed-in tariff issue).

This paper presents results from 1½ year of measurements of energy performance and indoor climate carried out in the building in the period 2017-2018.

Measurements of energy consumption showed that if the PV installation has produced as expected and the residents had used electricity as expected, the building would have been only 11% from being energy neutral.

Indoor climate measurements show high temperatures in a large share of the period, especially when the mechanical ventilation system is in summer mode, i.e. only mechanical exhaust ventilation from bathroom and kitchen.
OriginalsprogEngelsk
Titel1st Nordic Conference on Zero Emission and Plus Energy Buildings
Antal sider7
ForlagIOP Publishing
Publikationsdato6 nov. 2019
Sider1-7
Artikelnummer012010
DOI
StatusUdgivet - 6 nov. 2019
BegivenhedNordic Conference on Zero Emission and Plus Energy Buildings - Clarion Hotel Trondheim, Trondheim, Norge
Varighed: 6 nov. 20197 nov. 2019
Konferencens nummer: 1
https://www.ntnu.edu/nordic-zeb-2019

Konference

KonferenceNordic Conference on Zero Emission and Plus Energy Buildings
Nummer1
LokationClarion Hotel Trondheim
LandNorge
ByTrondheim
Periode06/11/201907/11/2019
Internetadresse
NavnIOP Conference Series: Earth and Environmental Science
Vol/bind352
ISSN1755-1307

Fingerprint

Electricity
Roofs
Electric batteries
Electric power measurement
Exergy
Waste heat utilization
Ventilation
Wastewater
Energy utilization
Temperature
Water

Emneord

  • energy neutral
  • Low-energy buildings
  • measurements
  • Energy Consumption

Citer dette

Wittchen, K. B., & Jensen, S. Ø. (2019). Energy and indoor climate measurements in Denmark’s first energy neutral block of flats. I 1st Nordic Conference on Zero Emission and Plus Energy Buildings (s. 1-7). [012010] IOP Publishing. IOP Conference Series: Earth and Environmental Science, Bind. 352 https://doi.org/10.1088/1755-1315/352/1/012010
Wittchen, Kim B. ; Jensen, Søren Østergaard. / Energy and indoor climate measurements in Denmark’s first energy neutral block of flats. 1st Nordic Conference on Zero Emission and Plus Energy Buildings. IOP Publishing, 2019. s. 1-7 (IOP Conference Series: Earth and Environmental Science, Bind 352).
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Wittchen, KB & Jensen, SØ 2019, Energy and indoor climate measurements in Denmark’s first energy neutral block of flats. i 1st Nordic Conference on Zero Emission and Plus Energy Buildings., 012010, IOP Publishing, IOP Conference Series: Earth and Environmental Science, bind 352, s. 1-7, Nordic Conference on Zero Emission and Plus Energy Buildings, Trondheim, Norge, 06/11/2019. https://doi.org/10.1088/1755-1315/352/1/012010

Energy and indoor climate measurements in Denmark’s first energy neutral block of flats. / Wittchen, Kim B.; Jensen, Søren Østergaard.

1st Nordic Conference on Zero Emission and Plus Energy Buildings. IOP Publishing, 2019. s. 1-7 012010 (IOP Conference Series: Earth and Environmental Science, Bind 352).

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

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Wittchen KB, Jensen SØ. Energy and indoor climate measurements in Denmark’s first energy neutral block of flats. I 1st Nordic Conference on Zero Emission and Plus Energy Buildings. IOP Publishing. 2019. s. 1-7. 012010. (IOP Conference Series: Earth and Environmental Science, Bind 352). https://doi.org/10.1088/1755-1315/352/1/012010