Comparison of Static and Simulation-Based Calculation Methods for the Design of Energy-Efficient Measures in Building Renovation

Buildings are important energy consumers and one of the main contributors to global warming. Analytical models used in traditional energy assessments often lack the precision needed for accurate results. 3D models used for dynamic energy simulations offer a more accurate and transparent approach to understand energy flows and identify potential areas for improvement. This paper presents a case study investigating the winter performance of an existing family house building using measured data. The measured parameters provided the basis for determining compliance of the indoor climate with the standards. Subsequently, a 3D model of the house was created using DesignBuilder software, and a thermal simulation analysis was performed. In the next step, energy-saving measures were proposed, followed by an energy balance analysis to evaluate their effectiveness. A comparison between the simulation results and those obtained from analytical calculations performed in MS Excel revealed certain discrepancies. This study demonstrates the potential of employing energy simulations as an alternative to simplified analytical calculations for conducting energy audits.