doiSerbia

Building envelope influence on the annual energy performance in office buildings

Harmati Norbert L. (Faculty of Technical Sciences, Department of Civil Engineering and Geodesy, Novi Sad)
Folić Radomir J. (Faculty of Technical Sciences, Department of Civil Engineering and Geodesy, Novi Sad)
Magyar Zoltán (Budapest University of Technology and Economics, Faculty of Architecture, Department of Building Energetics and Building Services, Budapest, Hungary)
Dražić Jasmina (Faculty of Technical Sciences, Department of Civil Engineering and Geodesy, Novi Sad)
Kurtović-Folić Nađa (Budapest University of Technology and Economics, Faculty of Architecture, Department of Building Energetics and Building Services, Budapest, Hungary)

The objective of the research is to determine the quantitative influence of building envelope on the annual heating and cooling energy demand in office buildings demonstrated on a reference office-tower building located in Novi Sad, Serbia. The investigation intended to find preferable and applicable solutions for energy performance improvement in currently inefficient office buildings. A comparative and evaluative analysis was performed among the heating energy expenses and simulated values from the multi-zone model designed in EnergyPlus engine. The research determines an improved window to wall ratio using dynamic daylight simulation and presents the influence of glazing parameters (U-value, Solar heat gain coefficient - SHGC) on the annual energy performance. Findings presented window to wall ratio reduction down to 30% and point out the significance of the SHGC parameter on the overall energy performance of buildings with high internal loads. The calculation of the air-ventilation energy demand according to EN 15251 is included respectively. Results offer effective methods for energy performance improvement in temperate climate conditions.

Keywords: energy performance, building envelope, daylight simulation, energy plus