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Two methods for normalisation of measured energy performance-Testing of a net-zero energy building in Sweden

Berggren, Björn LU and Wall, Maria LU (2017) In Buildings 7(4).
Abstract

An increasing demand for energy-efficient buildings has led to an increasing focus on predicted energy performance once a building is in use. Many studies have identified a performance gap between predicted energy use and actual measured energy use once buildings are in the user phase. However, none of the identified studies normalise measured energy use for both internal and external deviating boundary conditions. This study uses a Net-zero energy building (Net ZEB) building in Sweden to test two different approaches to the normalisation of measured energy use-static and dynamic methods. The normalisation of energy use for a ground source heat pump reduces the performance gap from 12% to 1-5%, depending on the method of normalisation.... (More)

An increasing demand for energy-efficient buildings has led to an increasing focus on predicted energy performance once a building is in use. Many studies have identified a performance gap between predicted energy use and actual measured energy use once buildings are in the user phase. However, none of the identified studies normalise measured energy use for both internal and external deviating boundary conditions. This study uses a Net-zero energy building (Net ZEB) building in Sweden to test two different approaches to the normalisation of measured energy use-static and dynamic methods. The normalisation of energy use for a ground source heat pump reduces the performance gap from 12% to 1-5%, depending on the method of normalisation. The normalisation of energy from photovoltaic (PV) panels reduces the performance gap from 17% to 5%, regardless of the method used. The results show that normalisation is important in order to accurately determine the energy performance of buildings. The most important parameters are the indoor temperature and internal loads, which have the largest effect on normalisation in this case study. Furthermore, the case study shows that it is possible to build Net ZEB buildings with existing technologies in a Northern European climate.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Energy monitoring, Energy performance, Net-zero energy building, Normalisation, Performance gap
in
Buildings
volume
7
issue
4
publisher
MDPI AG
external identifiers
  • scopus:85033722747
ISSN
2075-5309
DOI
10.3390/buildings7040086
language
English
LU publication?
yes
id
3e84d178-0cc8-4b16-b97c-f9b0c1bd916b
date added to LUP
2017-11-24 08:39:49
date last changed
2018-01-07 12:26:53
@article{3e84d178-0cc8-4b16-b97c-f9b0c1bd916b,
  abstract     = {<p>An increasing demand for energy-efficient buildings has led to an increasing focus on predicted energy performance once a building is in use. Many studies have identified a performance gap between predicted energy use and actual measured energy use once buildings are in the user phase. However, none of the identified studies normalise measured energy use for both internal and external deviating boundary conditions. This study uses a Net-zero energy building (Net ZEB) building in Sweden to test two different approaches to the normalisation of measured energy use-static and dynamic methods. The normalisation of energy use for a ground source heat pump reduces the performance gap from 12% to 1-5%, depending on the method of normalisation. The normalisation of energy from photovoltaic (PV) panels reduces the performance gap from 17% to 5%, regardless of the method used. The results show that normalisation is important in order to accurately determine the energy performance of buildings. The most important parameters are the indoor temperature and internal loads, which have the largest effect on normalisation in this case study. Furthermore, the case study shows that it is possible to build Net ZEB buildings with existing technologies in a Northern European climate.</p>},
  articleno    = {86},
  author       = {Berggren, Björn and Wall, Maria},
  issn         = {2075-5309},
  keyword      = {Energy monitoring,Energy performance,Net-zero energy building,Normalisation,Performance gap},
  language     = {eng},
  month        = {10},
  number       = {4},
  publisher    = {MDPI AG},
  series       = {Buildings},
  title        = {Two methods for normalisation of measured energy performance-Testing of a net-zero energy building in Sweden},
  url          = {http://dx.doi.org/10.3390/buildings7040086},
  volume       = {7},
  year         = {2017},
}