Optimization of insulation in ventilated hinged facade systems

Irina Maltseva,Alexey Verkhovskiy,Aleksandr Elokhov,Vitaliy Borisov,K Prušková,J Oláh,H Fariborz,S Šilarová,J Melcher,J Váchal,J Mareček,I Juhásová Šenitková,M Flimel,F Kulhánek,M Vochozka,P Juhás

doi:10.1051/matecconf/201927903002

Abstract

The system of hinged ventilated facades is available for a long time and is now widely used in the construction of new and reconstruction of existing buildings for various purposes. As practice shows, the problems associated with the operation of these facade systems are usually caused by mistakes in the design, selection of components and installation of the system. Ventilated facade is a multi-layered enclosing structure, which includes a layer of insulation. Mineral wool slabs are ideal for this facade system, as it has low thermal conductivity, resistance to temperature changes and excellent vapor permeability, which allows to fully open the potential of a ventilated air layer. In the article two ways of installation of thermal insulation are considered: single-layer and two-layer with different types of air interlayer: closed, weakly and strongly ventilated. In accordance with the requirements of Russian and European regulatory documents, the effect of gaps between the thermal insulation plates in a single-layer and two-layer design on the reduction of the heat transfer resistance of hinged facade systems with an air gap was estimated by calculating 2-dimensional temperature fields. The coefficient of thermotechnic uniformity was also defined. As a result, optimal variants of thermal insulation and types of bases for fixing thermal insulation are suggested.

Highlights

The system of hinged ventilated facades is available for a long time and is widely used in the construction of new and reconstruction of existing buildings for various purposes
The authors of the article carried out the research of the effect of various insulation schemes and gaps between thermal insulation plates on the values of the reduced resistance to heat transfer and the heat transfer performance uniformity factor of hinged facade systems with an air gap using the method of twodimensional temperature fields
The calculations showed that for single-layer insulation, even the minimum allowed clearance of 2 mm leads to a significant reduction in the reduced resistance to heat transfer value, while the two-layer thermal insulation scheme remains effective (Table 3)

Summary

Introduction

The system of hinged ventilated facades is available for a long time and is widely used in the construction of new and reconstruction of existing buildings for various purposes. The system of hinged ventilated facades is known for a long time and is widely used in the construction of new and reconstruction of existing buildings with different areas of destination. Ventilated facade is a multi-layered enclosing structure, inside of which an air gap is provided between the thermal insulation and the outer decorative-protective layer. The air that circulates freely inside the gap facilitates the ventilation of the internal layers of the system and the moisture outflow accumulated during operation, thereby ensuring an optimum moisture balance within the structure, which significantly increases the service life of the building structures and preserves their thermal and technical characteristics [2]

Features of installation of thermal insulation

Model and calculation procedure

Results and discussion

Conclusions