EnerTwin: A Digital Twin Software for Occupancy-Driven Building Energy and Sustainability Analysis

EnerTwin is a digital twin software platform for dynamic analysis of building energy performance, operational costs, and carbon emissions under varying occupancy conditions. The software integrates occupancy-based energy demand modeling, end-use energy analysis, fuel allocation, photovoltaic (PV) generation, economic evaluation, and greenhouse gas assessment into an interactive graphical user interface (GUI). EnerTwin enables real-time scenario simulation and visualization of key performance indicators, supporting sensitivity analysis and informed decision-making for energy-efficient and sustainable building operation. The software is suitable for researchers, energy managers, consultants, and facility operators seeking to evaluate occupancy impacts and optimize building energy performance.