### Resumé

In order to assess the influence of energy reduction initiatives, to determine the expected annual cost, to calculate life cycle cost, emission impact, etc. it is crucial to be able to assess the energy consumption reasonably accurate.

The present work undertakes a theoretical and empirical study of the uncertainty of energy consumption assessment of domestic buildings. The calculated energy consumption of a number of almost identical domestic buildings in Denmark is compared with the measured energy consumption. Furthermore, the uncertainty is determined by means of stochastic modelling based on input distributions found by literature study, industry guidelines, measurements and - when necessary - simple assumptions.

A number of parameters are investigated and ranked in terms of importance to determine which ones contribute the most to the overall level of uncertainty. Measurements and simulations are found to correspond reasonably well; however, it is also found that significant differences may occur between calculated and measured energy consumption due to the spread and due to the fact that the result can only be determined with a certain probability. It is found that occupants' behaviour is the major contributor to the variance of the energy consumption.

Originalsprog | Engelsk |
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Titel | Building Simulation 2009 : University of Stractclyde, Glosgow, 27th-30th July : Proceedings of the 11th International Building Performance Simulation Association Conference |

Redaktører | Paul A. Strachan, Nick J. Kelly, Michaël Kummert |

Antal sider | 8 |

Forlag | The International Building Performance Simulation Association Conference |

Publikationsdato | 2009 |

ISBN (Trykt) | 978-0-947649-40-1 |

Status | Udgivet - 2009 |

Begivenhed | The International Building Performance Simulation Association Conference (IBPSA) - Glasgow, Storbritannien Varighed: 27 jul. 2009 → 30 jul. 2009 Konferencens nummer: 11 |

### Konference

Konference | The International Building Performance Simulation Association Conference (IBPSA) |
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Nummer | 11 |

Land | Storbritannien |

By | Glasgow |

Periode | 27/07/2009 → 30/07/2009 |

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### Citer dette

*Building Simulation 2009 : University of Stractclyde, Glosgow, 27th-30th July: Proceedings of the 11th International Building Performance Simulation Association Conference*The International Building Performance Simulation Association Conference.

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*Building Simulation 2009 : University of Stractclyde, Glosgow, 27th-30th July: Proceedings of the 11th International Building Performance Simulation Association Conference.*The International Building Performance Simulation Association Conference, The International Building Performance Simulation Association Conference (IBPSA), Glasgow, Storbritannien, 27/07/2009.

**Uncertainty of Energy Consumption Assessment of Domestic Buildings.** / Brohus, Henrik; Heiselberg, Per; Simonsen, A.; Sørensen, K.C.

Publikation: Bidrag til bog/antologi/rapport/konference proceeding › Konferenceartikel i proceeding › Forskning › peer review

TY - GEN

T1 - Uncertainty of Energy Consumption Assessment of Domestic Buildings

AU - Brohus, Henrik

AU - Heiselberg, Per

AU - Simonsen, A.

AU - Sørensen, K.C.

PY - 2009

Y1 - 2009

N2 - In order to assess the influence of energy reduction initiatives, to determine the expected annual cost, to calculate life cycle cost, emission impact, etc. it is crucial to be able to assess the energy consumption reasonably accurate.The present work undertakes a theoretical and empirical study of the uncertainty of energy consumption assessment of domestic buildings. The calculated energy consumption of a number of almost identical domestic buildings in Denmark is compared with the measured energy consumption. Furthermore, the uncertainty is determined by means of stochastic modelling based on input distributions found by literature study, industry guidelines, measurements and - when necessary - simple assumptions.A number of parameters are investigated and ranked in terms of importance to determine which ones contribute the most to the overall level of uncertainty. Measurements and simulations are found to correspond reasonably well; however, it is also found that significant differences may occur between calculated and measured energy consumption due to the spread and due to the fact that the result can only be determined with a certain probability. It is found that occupants' behaviour is the major contributor to the variance of the energy consumption.

AB - In order to assess the influence of energy reduction initiatives, to determine the expected annual cost, to calculate life cycle cost, emission impact, etc. it is crucial to be able to assess the energy consumption reasonably accurate.The present work undertakes a theoretical and empirical study of the uncertainty of energy consumption assessment of domestic buildings. The calculated energy consumption of a number of almost identical domestic buildings in Denmark is compared with the measured energy consumption. Furthermore, the uncertainty is determined by means of stochastic modelling based on input distributions found by literature study, industry guidelines, measurements and - when necessary - simple assumptions.A number of parameters are investigated and ranked in terms of importance to determine which ones contribute the most to the overall level of uncertainty. Measurements and simulations are found to correspond reasonably well; however, it is also found that significant differences may occur between calculated and measured energy consumption due to the spread and due to the fact that the result can only be determined with a certain probability. It is found that occupants' behaviour is the major contributor to the variance of the energy consumption.

M3 - Article in proceeding

SN - 978-0-947649-40-1

BT - Building Simulation 2009 : University of Stractclyde, Glosgow, 27th-30th July

A2 - Strachan, Paul A.

A2 - Kelly, Nick J.

A2 - Kummert, Michaël

PB - The International Building Performance Simulation Association Conference

ER -