Problems of thermal protection of two-layer external walls with hinged facade systems

Ekaterina Ibe,Galina Shibaeva,Danil Litvin,Svyatoslav Mironov,P Akimov,A Tusnin,N Vatin,A Doroshenko

doi:10.1051/e3sconf/202126302013

Abstract

Currently, in the Republic of Khakassia, much attention is paid to research aimed at reducing air pollution due to fuel combustion. In this aspect, the issue of increasing the energy efficiency of buildings is relevant. The use of ventilated facade systems with an air gap makes it possible to improve the energy efficiency class of buildings and modernize the facades. However, these facade systems have weak points that require detailed and high-quality study. Often, design solutions are used that are used in warm climates without taking into account the peculiarities of a cold climate - frequent changes in temperature, humidity, wind loads, and other influences, which can lead to negative manifestations. Facade systems with a ventilated air gap must provide the ability to monitor the operability of all system elements and, if necessary, carry out repair and reconstruction work with minimal operating costs. The article presents an analysis of the thermal properties of an external fence using a hinged facade structure. The influence of installation defects and heat-conducting inclusions on the heat-shielding properties of the building envelope is shown. It was determined that during operation the moisture-windproof membrane loses its vapor-permeable properties.

Highlights

The issues of heat-saving during the operation of buildings play an important role, because thermal protection requirements are gradually increasing
Due to the high air draft, pollutants in the form of dust and soot enter the ventilated air layer along with the atmospheric air, which settles on the surface of the insulation and can penetrate its thickness, deteriorating the properties
The windproof membrane reduces the removal of moisture from the insulation, since the membrane has a high resistance to vapor permeation

Summary

Introduction

The issues of heat-saving during the operation of buildings play an important role, because thermal protection requirements are gradually increasing. Many buildings built with the advent of the first part of heat conservation standards currently have a low energy efficiency class. After 2000, various heat-shielding materials were used in the construction of apartment buildings, and the building technology of multi-layer brick walls appeared. Progressive technical and technological solutions have been actively introduced in construction. One of these is the ventilated air gap curtain wall system. The structure can ensure the reliability of facades through the use of new materials that are resistant to weathering and temperature extremes

Methods

Results

Conclusion