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Archetype identification in Urban Building Energy Modeling: Research gaps and method development
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Civil and Industrial Engineering, Civil Engineering and Built Environment.ORCID iD: 0000-0002-4315-7898
2023 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Buildings and the built environment account for a significant portion of the global energy use and greenhouse gas emissions, and reducing the energy demand in this sector is crucial for a sustainable energy transition. This highlights the need for accurate and large-scale estimations and predictions of the future energy demand in buildings. Urban building energy modeling (UBEM) is an analytical tool for precise and high-quality energy modelling of city-scale building stocks, which is growing in interest as a useful tool for researchers and decision-makers worldwide.

This thesis contributes to the understanding and future development in the field of UBEM and multi-variate cluster analysis. Based on a review of contemporary literature, possible improvements and knowledge gaps regarding UBEM are identified. The majority of UBEM studies are developed for similar applications, and some challenges are close to universal. Difficulties in data acquisition and the identification and characterisation of building archetypes are frequently addressed. Drawing on conclusions from the review, a clustering methodology for identifying building archetypes for hybrid UBEM was developed. The methodology utilised the k-means cluster analysis algorithm for multiple diverse parameters, including socio-economic indicators, and is based on open data sets which eliminates data acquisition issues and allows for easy adaptation. Building archetypes were successfully identified for two large data sets, and proved to be representative of the sample building stock. The results of the analysis also show that the error metric values diverge after a certain number of clusters, for multiple runs of the algorithm. This property of the algorithm in combination with the use of both existing and novel error metrics provide a reliable method for determining the optimal number of clusters. The methodology developed in this thesis enables for an improved modelling process, as a part of a complete UBEM.

Place, publisher, year, edition, pages
Uppsala: Uppsala universitet, 2023. , p. 54
Keywords [en]
Energy demand forecasting, Energy modelling, Urban building energy modelling, Cluster analysis, Building archetypes
National Category
Energy Systems
Research subject
Engineering Science with specialization in Civil Engineering and Built Environment; Engineering Science with specialization in Civil Engineering and Built Environment
Identifiers
URN: urn:nbn:se:uu:diva-501231OAI: oai:DiVA.org:uu-501231DiVA, id: diva2:1754574
Presentation
2023-06-09, B51, Cramérgatan 3, Visby, 10:00 (English)
Opponent
Supervisors
Available from: 2023-05-17 Created: 2023-05-03 Last updated: 2023-05-17Bibliographically approved
List of papers
1. Advancing urban building energy modelling through new model components and applications: A review
Open this publication in new window or tab >>Advancing urban building energy modelling through new model components and applications: A review
2022 (English)In: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 266, article id 112099Article, review/survey (Refereed) Published
Abstract [en]

Due to rapid urbanisation and the significant contribution of cities to worldwide energy use and greenhouse gas emissions, urban energy system planning is growing more important. Urban building energy modelling (UBEM) draws increasing attention in the energy modelling field due to its inherent capacities for modelling entire cities or building stocks, and the potential of varying data inputs, approaches and applications. This review aims to identify best practices and improvements for UBEM applications by examining previous research, with a focus on the currently least established approaches. Different archetype development procedures are analysed for common problems, six main under-developed input approaches or parameters are identified, and applications for future scenario development are surveyed. By analysing previous studies in related fields, this paper provides an overview of gaps in the published research and possible additions to future UBEM projects that can help expanding the existing modelling procedures. Comprehensive human behaviour models with additional aspects beyond occupant presence are identified as a major point of interest. Further research on socio-economic parameters, such as household income and demographics, are also suggested to further improve modelling. This study also underlines the potential for utilising UBEM as a tool for evaluating future climate change scenarios.

Place, publisher, year, edition, pages
ElsevierElsevier BV, 2022
Keywords
Urban building energy modelling, Bottom -up modelling, Building archetype, Modelling components, Socio-economic data
National Category
Energy Systems
Identifiers
urn:nbn:se:uu:diva-478857 (URN)10.1016/j.enbuild.2022.112099 (DOI)000800421000001 ()
Available from: 2022-06-28 Created: 2022-06-28 Last updated: 2025-09-07Bibliographically approved
2. Identification of representative building archetypes: A novel approach using multi-parameter cluster analysis applied to the Swedish residential building stock
Open this publication in new window or tab >>Identification of representative building archetypes: A novel approach using multi-parameter cluster analysis applied to the Swedish residential building stock
2024 (English)In: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 303, article id 113823Article in journal (Refereed) Published
Abstract [en]

Building archetype identification is crucial for Urban Building Energy Modeling (UBEM), but is still considered one of the biggest challenges in this field. New methods of data acquisition, along with data mining techniques such as clustering, have recently received attention for the possibility of significantly increasing identification reliability and archetype accuracy. This paper aims to establish a new and simple clustering methodology for developing building archetypes for hybrid UBEM, using open data sets and multiple diverse variables, that is still reliable and possible to validate without the use of metered energy use or real building data. The methodology uses k-means clustering for 10 building parameters simultaneously, including socio-economic parameters obtained using spatial interpolation of statistical values. Building archetypes are successfully developed for the residential building stocks of two case study areas in Sweden. The results also show that the error metric values for multiple iterations diverge after a certain number of clusters, even when using the same clustering methodology on the same data set. This discovered effect, along with the combined use of one well-known and one novel error metric, constitutes a framework well adapted to accurately determining the optimal number of building archetypes.

Place, publisher, year, edition, pages
Elsevier, 2024
National Category
Other Civil Engineering
Identifiers
urn:nbn:se:uu:diva-501230 (URN)10.1016/j.enbuild.2023.113823 (DOI)001137651200001 ()
Note

Title in the list of papers of Lukas Dahlströms thesis: Optimising the identification of representative building archetypes: A novel approach using multi-parameter cluster analysis and publicly available databases

Available from: 2023-05-03 Created: 2023-05-03 Last updated: 2025-09-07Bibliographically approved

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