BUILDING SHADOW IMPACT TO THE PRIMARY ENERGY CONSUMPTION

Abstract

The application of the overhangs can yield energy savings during summer. This paper presents the optimization of the overhangs’ length during the cooling season. The optimization is done to minimize the total energy consumption (the sum of the primary energy consumption for cooling during the building lifecycle and the embodied energy of the overhangs and used air-conditioner). The analyzed residential house is located in Belgrade, Serbia. The overhangs face north, south, east, and west direction. For optimization of the overhangs, the Hooke-Jeeves method is used with the help of GenOpt code. EnergyPlus software is used to simulate the energy behavior of the house. The simulation results show that the house with optimally sized overhangs consumed 4.64% of primary energy for heating, cooling, and lighting than that of the house without overhangs.