Application of dynamic simulations in the analysis of measures for improving energy efficiency of buildings

One of the most commonly used methods for improving energy performances of buildings is reducing heating energy consumption. This paper shows a comparative analysis of building energy demand for space heating based on case studies in which building modifications were made with insulating materials of building envelopes and with different window types. For the analysis, a public building with 6 floors, located in Belgrade, was selected. For a dynamical simulation and evaluation of the applied energy efficiency measures to reduce heating energy consumption, the DesignBuilder program was used. The results show that the insulation of the building and the replacement of windows can lead to an annual reduction of heating energy up to 61%.