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Regulatory energy calculations versus real energy use in high-performance houses

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Abstract
How accurately can official energy performance calculations assess the real energy use in high-performance houses? This question was investigated by analysing 537 dwellings. Data on building characteristics and calculated performance from the Flemish Energy Performance of Buildings (EPB) database were complemented with data from energy utilities and surveys of inhabitants, their socio-demographic characteristics and user behaviours. While the real and theoretical energy uses were strongly correlated, the official calculation method overestimated the heating energy use of most houses while neglecting important electricity end uses. The prediction error varied strongly between individual cases. Two options within the calculation procedure had a significant impact on these prediction errors: the use of default values for the air tightness of the building envelope and the reported return temperature of the space heating system. The simplified calculation of net domestic hot water consumption and the real heating of the master bedrooms also affected prediction accuracy. However, extrapolations are hazardous due to the risk of selection and non-response biases implied by the approach and the need for further research into the causalities. Nonetheless, the findings stress the importance of accurate input data and realistic default values for calculation models used for high-performance buildings.
Keywords
housing, residential energy use, Energy Performance of Buildings Directive (EPBD), energy policy, domestic hot water, energy performance, rebound effect, energy demand, HEATING-SYSTEMS, SAMPLE-SIZE, CONSUMPTION, DEMOGRAPHICS, DWELLINGS, space heating, OCCUPANTS

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Citation

Please use this url to cite or link to this publication:

MLA
Delghust, Marc et al. “Regulatory Energy Calculations Versus Real Energy Use in High-performance Houses.” Ed. Lorch Richard. BUILDING RESEARCH AND INFORMATION 43.6 (2015): 675–690. Print.
APA
Delghust, M., Wina, R., Tine, T., Yves, D. W., & Janssens, A. (2015). Regulatory energy calculations versus real energy use in high-performance houses. (L. Richard, Ed.)BUILDING RESEARCH AND INFORMATION, 43(6), 675–690.
Chicago author-date
Delghust, Marc, Roelens Wina, Tanghe Tine, De Weerdt Yves, and Arnold Janssens. 2015. “Regulatory Energy Calculations Versus Real Energy Use in High-performance Houses.” Ed. Lorch Richard. Building Research and Information 43 (6): 675–690.
Chicago author-date (all authors)
Delghust, Marc, Roelens Wina, Tanghe Tine, De Weerdt Yves, and Arnold Janssens. 2015. “Regulatory Energy Calculations Versus Real Energy Use in High-performance Houses.” Ed. Lorch Richard. Building Research and Information 43 (6): 675–690.
Vancouver
1.
Delghust M, Wina R, Tine T, Yves DW, Janssens A. Regulatory energy calculations versus real energy use in high-performance houses. Richard L, editor. BUILDING RESEARCH AND INFORMATION. Routledge - Taylor & Francis Group; 2015;43(6):675–90.
IEEE
[1]
M. Delghust, R. Wina, T. Tine, D. W. Yves, and A. Janssens, “Regulatory energy calculations versus real energy use in high-performance houses,” BUILDING RESEARCH AND INFORMATION, vol. 43, no. 6, pp. 675–690, 2015.
@article{6983382,
  abstract     = {How accurately can official energy performance calculations assess the real energy use in high-performance houses? This question was investigated by analysing 537 dwellings. Data on building characteristics and calculated performance from the Flemish Energy Performance of Buildings (EPB) database were complemented with data from energy utilities and surveys of inhabitants, their socio-demographic characteristics and user behaviours. While the real and theoretical energy uses were strongly correlated, the official calculation method overestimated the heating energy use of most houses while neglecting important electricity end uses. The prediction error varied strongly between individual cases. Two options within the calculation procedure had a significant impact on these prediction errors: the use of default values for the air tightness of the building envelope and the reported return temperature of the space heating system. The simplified calculation of net domestic hot water consumption and the real heating of the master bedrooms also affected prediction accuracy. However, extrapolations are hazardous due to the risk of selection and non-response biases implied by the approach and the need for further research into the causalities. Nonetheless, the findings stress the importance of accurate input data and realistic default values for calculation models used for high-performance buildings.},
  author       = {Delghust, Marc and Wina, Roelens and Tine, Tanghe and Yves, De Weerdt and Janssens, Arnold},
  editor       = {Richard, Lorch},
  issn         = {0961-3218},
  journal      = {BUILDING RESEARCH AND INFORMATION},
  keywords     = {housing,residential energy use,Energy Performance of Buildings Directive (EPBD),energy policy,domestic hot water,energy performance,rebound effect,energy demand,HEATING-SYSTEMS,SAMPLE-SIZE,CONSUMPTION,DEMOGRAPHICS,DWELLINGS,space heating,OCCUPANTS},
  language     = {eng},
  number       = {6},
  pages        = {675--690},
  publisher    = {Routledge - Taylor & Francis Group},
  title        = {Regulatory energy calculations versus real energy use in high-performance houses},
  url          = {http://dx.doi.org/10.1080/09613218.2015.1033874},
  volume       = {43},
  year         = {2015},
}

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