Comparison of energyplus simulation results of double skin façade system with CFD and experiment data

Abstract

The purpose of this paper is to make a building simulation model for the double skin façade system using Energyplus and optimize the model using CFD(Computational Fluid Dynamics) and experimental data. When conducting the double skin façade simulation using Energyplus, it is required to select a proper solar distribution model which allows the beam solar radiation to be transmitted into the adjacent zone correctly. In addition, interzone heat and air transfer between the cavity space of the double skin façade system and the adjacent living space should be modelled correctly. Discharge coefficient calculation is an important process in making a building simulation when windows of the double skin façade system open. Discharge coefficient can be determined using experimental data but if the experiment data are not sufficient enough, CFD analysis can be used to get the coefficients. The wind pressure coefficients can also be obtained using CFD.