THE IMPACT OF THE TIMESTEP ON THE OVERHANG LENGTHS OPTIMISATION

Abstract

The building sector requires large amounts of energy both for cooling and heating. The cooling loads due to solar gains represent about half of the global cooling loads for residential and non-residential buildings. Overhang placing prevents the direct solar radiation and thus reduces the energy required for cooling of buildings. For optimization of the overhangs Hooke and Jeeves method was used with the help of code GenOpt. For simulation energy behavior of building, EnergyPlus was used. The aim of this study was to investigate an influence of the timestep of EnergyPlus calculation to the results obtained by optimizing of overhangs. The timestep is used in the zone heat balance model calculation as the driving timestep for heat transfer and load calculations. Increasing the timestep has the effect of reducing the results of total energy consumption for cooling.