BIM SIMULATION depending on the insulation performance and facility system was implemented because the problem that energy performance analysis was performed in the later stage of design made it impossible to change the design and main structure determined to improve energy performance .
Therefore , there is need to divide the role into energy performance analysis stages for design and for determining facility system in detail so that mass design considering energy performance can be implemented more freely with undetermined design and main structure . It is considered possible to maximise energy performance and efficiency compared to invested time and support by implementing energy performance analysis and evaluation from the conceptualisation stage and clarifying goals for each energy performance analysis .
An analysis of current energy performance-based BIM design BIM creates virtual models by 3D design using computers and makes it possible to reproduce and reprocess information according to the principal agent by inputting information across the whole building life cycle .
The availability of BIM has gradually increased because of these advantages and has been accompanied by efforts of each country to preoccupy technologies in related fields . In particular , these studies are based on the construction environment system supporting the Industry Foundation Classes ( IFC ) format called OPEN BIM , and this enables information exchange even in each life cycle stage of different buildings or different fields of architecture .
Moreover , IFC4 is the latest version that was developed from 2008 and released in 2015 . It has been gradually enhancing the function for OPEN BIM by solving technical problems such as atypical form , 4D and 5D models ’ transaction , product library , GIS interoperability , energy simulation , and ifcXML found after releasing IFC2x3 and ensuring the extensibility of IFC in fields related to infrastructure of architectural environment .
Therefore , guidelines for BIM and environmentally friendly building certification have been actively implemented worldwide . Furthermore , the development of environmentally friendly guidelines for BIM-based energy performance evaluation is a major issue for each country , and some countries such as the United States , British , and Australia have been making efforts to introduce energy performance evaluation through simulation .
Considering the ease of inputting geometric information such as integrity with BIM and envelope information using 3D shape information , unsteady state thermal load calculation methods are more compatible with BIM tools than analysis tools for steady state thermal load calculation methods and can deal with various shape information . Thus , the former has superior suitability for BIM . However , much information is lost in the process of transmitting BIM model information to energy performance analysis tools . Accordingly , it is urgent to prepare guidelines using BIM and steady state thermal load calculation tools .
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