ENERGY SAVING IN SERBIAN FAMILY HOUSE WITH HORIZONTAL OVERHANGS

Abstract

In this paper, dimensions of concrete horizontal roof overhangs were deter-mined in order to minimize the annual consumption of primary energy for heating, cooling, and lighting in a residential building. Also, the energy used for building overhangs (embodied energy) was taken into account in the calculation. The simula-tions were carried out for the building located in Belgrade, Serbia, throughout the year. The overhangs were placed horizontally to provide shading for all exterior walls and windows of the building. To create the model, the building energy simula-tion software package EnergyPlus was used. The overhang size optimization was performed by using HookeJeeves algorithm and plug-in GenOpt program. The simulation results show that the house with optimally sized overhangs consumed 5.20% of primary energy less for heating, cooling, and lighting than the building without overhangs.