Building Information Modeling (BIM) and Building Energy Modeling (BEM): Interoperability and Interactive Data Representation for the Energy Management of the Existing Buildings

The text discusses the potential for energy efficiency improvements in existing buildings, emphasizing the importance of digital modeling and Building Performance Simulation (BPS) methods to achieve Net Zero Energy Building (NZEB) standards. The integration of Building Information Modeling (BIM) and Building Energy Modeling (BEM) approaches is highlighted as crucial for enhancing energy efficiency. The proposed workflow involves five steps: constructing a BIM model, producing a geometric model using Industry Foundation Classes (IFC) standards, enriching the IFC databases with thermo-physical parameters, developing the BEM model, and creating a VR interactive environment. The methodology is tested on an office building at the University of Rome Tor Vergata. Key outcomes include verifying data interoperability, optimizing energy simulation processes, and enabling interactive exploration of energy data through VR techniques. This integrated approach reduces errors, time, and costs, while also serving as a decision-making support tool for building managers and an educational tool for energy design awareness. The study presents a scalable workflow for energy building management and lays the groundwork for innovative digital twin development for buildings and structure.