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The objective of this study is to investigate the file exchange compatibility of BIM based building energy simulation tools, especially focusing on various irregular building geometry shapes. As a base building modeling software, AUTOCAD Revit was selected and various building geometry shapes were created using Revit, such as curved and pitched walls, roofs, slabs with various air-conditioning zones. And these various shaped building zones were imported to ECOTECT, IES/VE and Openstudio for EnergyPlus, which are professional building energy simulation tools. Through this create-import process, the deformation of building shapes, change of zone volume, and compatibility to each simulation engine were investigated and analyzed.

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