Building energy analyses in Slovenia are usually performed by tools that do not offer interoperability with building information modelling and other modelling software. This means that several geometrical models need to be re-created for the same building.
A repetitive input of geometrical and non-geometrical data into different software packages is a time consuming, costly, and error prone process. Building information modelling (BIM) is replacing traditional two-dimensional drafting and BIM offers interoperability with different simulation tools. In this thesis we explore the energy analysis through the use of ArchiCAD with its plugin Ecodesigner STAR. This program offers seamless transformation from building information model to building energy model within the same software. Building energy analysis software, developed in Slovenia uses a quasi-stationary calculation method. ArchiCAD uses a more precise hourly method, but does not consider standards valid in Slovenia.
We used simplified cases to test the software and to develop modelling guidelines. We also studied the possibility of using geometric and non-geometric data generated by ArchiCAD in third party software, that considers calculation methods valid in Slovenia.
The transformation from building information model to building energy model is shown in the case of a block of flats. Step-by-step measures were taken to achieve better energy efficiency of the building. During the process strengths and weaknesses of the software were identified. We concluded that the software is most suitable for quick energy analyses in the design stage and as a decision support tool about reasonability of measures taken to improve building energy efficiency.
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