@inproceedings{discovery10159229,
          volume = {14},
           title = {High-order second-level space boundary topology calculation for building energy performance simulation modelling},
           month = {September},
            note = {This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.},
          series = {European Conference on Product \& Process Modelling (ECPPM)},
       publisher = {European Association of Product and Process Modelling (EAPPM)},
       booktitle = {Proceedings of the 14th European Conference on Product \& Process Modelling (ECPPM 2022)},
         address = {Trondheim, Norway},
            year = {2022},
             url = {https://www.ecppm2022.org/},
        abstract = {A second-level space boundary surface is the surface through which thermal energy flows
between internal building spaces and the building environment. To set up whole building energy simulation
models, knowledge of these boundaries is required. The geometric challenges associated with identifying
these second-level space boundaries are compounded when considering overlapping multi-layer building
constructions - a particular case but one often encountered in practice. In the present work, we introduce
the concept of a high-order (greater than two) space boundary surface and a geometric algorithm to identify
such surfaces from Building Information Models. The proposed algorithm extends our earlier work on
first-order second-level space boundary calculation. We use as input building information models from
real buildings, to demonstrate the efficacy of the proposed algorithm. In particular, we consider a facade
retrofitting application scenario where external or internal multi-layer insulation elements are added. The
application of the algorithm automatically identified correctly second and third order second-level space
boundaries related to these additional elements.},
          author = {Lilis, Georgios and Katsigarakis, Kyriakos and Rovas, Dimitrios}
}