Urban Building Thermal Energy Analysis at City District Scale

Hermann Edtmayer*, Lisa-Marie Fochler, Peter Josef Nageler, Thomas Mach

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review


This conference article presents the thermal energy analysis of a city district in Graz, Austria by the use of a newly developed numerical energy system model (see figure 1). From this model, a multi-tool workflow was derived to implement a high-resolution bottom-up approach at district scale. The goal was to carry out a sensitivity analysis regarding different boundary factors as varying parameters. The thermal energy demand (heating, cooling and hot water) as well as the CO2-equv. emissions of the existing building stock in the considered area were investigated.
The developed multi-tool workflow consists of several processing steps. 1) data input from stakeholders 2) pre-processing into a georeferenced 3D CAD urban building information model 3) import into central PostgreSQL data hub 4) automated urban building modelling 5) dynamic building energy simulation 6) post-processing and visualisation.
The thermal energy demand was calculated in hourly mean values for each building and each varied parameter. Using the annual total in combination with CO2 emission factors the annual CO2-equv. emissions were determined. The sensitivity of the stock area to the parameter variation regarding the annual thermal energy demand could be shown. Furthermore, the influence of different energy sources on the CO2-equv. emissions could be examined.
Original languageEnglish
Title of host publication7th International Conference on Smart Energy Systems
Subtitle of host publicationBook of Abstracts
Place of PublicationAalborg, Denmark
PublisherAalborg Universitetsforlag
Number of pages2
Publication statusPublished - Sept 2021
Event7th International Conference on Smart Energy Systems: 4th Generation District Heating, Electrification, Electrofuels and Energy Efficiency - Copenhagen, Denmark
Duration: 21 Sept 202122 Sept 2021


Conference7th International Conference on Smart Energy Systems
Abbreviated titleSESAAU2021
Internet address


  • numerical energy system model
  • urban building energy simulation
  • sensitivity analysis
  • CO2-equv. emissions

ASJC Scopus subject areas

  • Computer Science Applications
  • Renewable Energy, Sustainability and the Environment
  • Computer Graphics and Computer-Aided Design
  • Energy Engineering and Power Technology

Fields of Expertise

  • Sustainable Systems
  • Information, Communication & Computing

Treatment code (Nähere Zuordnung)

  • Application
  • Experimental
  • Theoretical

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