Thermo-Technical Issues of Ventilated Facades in Azerbaijan

Abstract

When utilization the technology of ventilated facades for any buildings it is often necessary to solve complex technical and technological issues for designers and operators. By implement architectural solutions and ideas it is essential to calculate major thermo-technical characteristics of the facades, the location of each bracket, structural elements, complex joints in order to avoid or minimize thermal bridges. Ventilated facades usually have very complicated geometric shapes and configurations. This article reflects an expert assessment of the thermo- technical issues of using ventilated facades in harsh wind operating conditions in terms of reducing the heat bridges. The effect of wind on the ventilated facade systems for climate indicators of the city of Baku is considered. Measurements of the wind speed along the facade height and air velocity in the cavity had been carried out with the multi-functional measuring instruments Testo. An increase in wind speed leads to the growth of the cavity air velocity that is achieved 1–1.5 m/s and as result, it causes declining in the thermal resistance of the external wall. The resulting approximation equation accurately reflects actual air velocity in the air gap. The main consequences of the thermal-technical issues are revealed. Findings can be used for calculated- experimental control of the facade thermal characteristics in order to fulfill a multi-disciplinary energy audit of the building.