ASHRAE RP-1815–integrating occupant behavior data into building information modeling workflows and open data standards

Abstract

The ASHRAE RP-1815 project centers on advancing the state of occupant behavior modeling as part of building information modeling (BIM) and energy modeling and simulation (BEM) workflows. Enhancements to the industry data standards IFCs and gbXML for BIM and BEM to support occupant behavior modeling data were a specific area of focus and project deliverable. It emphasizes the crucial role of occupant behavior modeling (OBM) in enhancing energy modeling accuracy and building performance analysis, identifying the need for more effective integration to capture the impact of occupant behavior on building energy use. As part of this initiative, a comprehensive review has been conducted of existing technologies and standards’ support of OBM. This work specifically anticipates use of gbXML and IFC in energy modeling workflows using the DOE’s EnergyPlus energy modeler including the system’s Functional Mockup (FMU) co-simulation capabilities to support dynamic modeling of occupant behavior impacts on energy performance simulation. To support these workflows, revisions to the gbXML and obXML schemas have been developed. IFC targeted enhancements have led to the development of an online data dictionary service. Enhanced BIM to BEM workflows offering OBM are presented together with suggestions for future technical and process enhancements required to support commercial applications.