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Comparison of the actual and theoretical energy use in nZEB renovations of multi-family buildings using in situ monitoring

Stijn Van de Putte (UGent) , Wolf Bracke (UGent) , Marc Delghust (UGent) , Marijke Steeman (UGent) and Arnold Janssens (UGent)
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Abstract
Often there is a significant difference between the actually measured and theoretically calculated energy use. The deviation between the two can be a result of errors in design, construction or commissioning, due to the technical performance of building components and installations that don't meet the design requirements. But equally, incorrect assumptions in the calculation can largely affect the results, for example the user influence that is simulated in a different way. This paper presents the analysis of data from an on-site monitoring system of two case study multi-family buildings that were deeply refurbished. It points out that the calculated energy use for space heating was largely underestimated, while there was an overestimation of the energy use for domestic hot water. The high indoor temperature and the low occupancy of the apartments were identified as the key parameters to explain this striking difference between the theoretical design and the actual situation.
Keywords
monitoring, nearly zero energy building, performance gap, measured energy use, case study

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MLA
Van de Putte, Stijn, et al. “Comparison of the Actual and Theoretical Energy Use in NZEB Renovations of Multi-Family Buildings Using in Situ Monitoring.” 12TH NORDIC SYMPOSIUM ON BUILDING PHYSICS (NSB 2020), edited by Jarek Kurnitski and Targo Kalamees, vol. 172, EDP Sciences, 2020, doi:10.1051/e3sconf/202017222007.
APA
Van de Putte, S., Bracke, W., Delghust, M., Steeman, M., & Janssens, A. (2020). Comparison of the actual and theoretical energy use in nZEB renovations of multi-family buildings using in situ monitoring. In J. Kurnitski & T. Kalamees (Eds.), 12TH NORDIC SYMPOSIUM ON BUILDING PHYSICS (NSB 2020) (Vol. 172). Cedex A, France: EDP Sciences. https://doi.org/10.1051/e3sconf/202017222007
Chicago author-date
Van de Putte, Stijn, Wolf Bracke, Marc Delghust, Marijke Steeman, and Arnold Janssens. 2020. “Comparison of the Actual and Theoretical Energy Use in NZEB Renovations of Multi-Family Buildings Using in Situ Monitoring.” In 12TH NORDIC SYMPOSIUM ON BUILDING PHYSICS (NSB 2020), edited by Jarek Kurnitski and Targo Kalamees. Vol. 172. Cedex A, France: EDP Sciences. https://doi.org/10.1051/e3sconf/202017222007.
Chicago author-date (all authors)
Van de Putte, Stijn, Wolf Bracke, Marc Delghust, Marijke Steeman, and Arnold Janssens. 2020. “Comparison of the Actual and Theoretical Energy Use in NZEB Renovations of Multi-Family Buildings Using in Situ Monitoring.” In 12TH NORDIC SYMPOSIUM ON BUILDING PHYSICS (NSB 2020), ed by. Jarek Kurnitski and Targo Kalamees. Vol. 172. Cedex A, France: EDP Sciences. doi:10.1051/e3sconf/202017222007.
Vancouver
1.
Van de Putte S, Bracke W, Delghust M, Steeman M, Janssens A. Comparison of the actual and theoretical energy use in nZEB renovations of multi-family buildings using in situ monitoring. In: Kurnitski J, Kalamees T, editors. 12TH NORDIC SYMPOSIUM ON BUILDING PHYSICS (NSB 2020). Cedex A, France: EDP Sciences; 2020.
IEEE
[1]
S. Van de Putte, W. Bracke, M. Delghust, M. Steeman, and A. Janssens, “Comparison of the actual and theoretical energy use in nZEB renovations of multi-family buildings using in situ monitoring,” in 12TH NORDIC SYMPOSIUM ON BUILDING PHYSICS (NSB 2020), Tallinn, Estonia, 2020, vol. 172.
@inproceedings{8690131,
  abstract     = {Often there is a significant difference between the actually measured and theoretically calculated energy use. The deviation between the two can be a result of errors in design, construction or commissioning, due to the technical performance of building components and installations that don't meet the design requirements. But equally, incorrect assumptions in the calculation can largely affect the results, for example the user influence that is simulated in a different way. This paper presents the analysis of data from an on-site monitoring system of two case study multi-family buildings that were deeply refurbished. It points out that the calculated energy use for space heating was largely underestimated, while there was an overestimation of the energy use for domestic hot water. The high indoor temperature and the low occupancy of the apartments were identified as the key parameters to explain this striking difference between the theoretical design and the actual situation.},
  articleno    = {22007},
  author       = {Van de Putte, Stijn and Bracke, Wolf and Delghust, Marc and Steeman, Marijke and Janssens, Arnold},
  booktitle    = {12TH NORDIC SYMPOSIUM ON BUILDING PHYSICS (NSB 2020)},
  editor       = {Kurnitski, Jarek and Kalamees, Targo},
  issn         = {2267-1242},
  keywords     = {monitoring,nearly zero energy building,performance gap,measured energy use,case study},
  language     = {eng},
  location     = {Tallinn, Estonia},
  pages        = {8},
  publisher    = {EDP Sciences},
  title        = {Comparison of the actual and theoretical energy use in nZEB renovations of multi-family buildings using in situ monitoring},
  url          = {http://dx.doi.org/10.1051/e3sconf/202017222007},
  volume       = {172},
  year         = {2020},
}

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