Research on operational efficiency of systems of external heat insulation of facades

When solving engineering and technological problems in the choice of thermal insulation one of the most important and responsible tasks is the task of estimating the terms of operational efficiency of technological systems of hinged ventilated facades. The solution to this problem is to determine at the given intervals the most significant indicator of the quality of the system, which is the resistance of heat transfer. For operational efficiency of the hinged ventilated facade, a non-repair period of operation was adopted, in which the system retains the calculated normative index of heat transfer resistance. Purpose. The purpose of the article is to determine the operational efficiency of the hinged ventilated facade systems with various structural and technological solutions. To achieve this goal, the following tasks are defined: to propose a formula for determining operational efficiency; to determine the term of operational efficiency of hinged facade systems with various structural and technological solutions for various climatic regions of Ukraine. Conclusion. The use of hinged ventilated facades as thermal insulation material of mineral wool heater with a density of 40 kg/m3 – is impractical. To increase the effective life of the hinged ventilated facade, it is necessary to use a mineral wool heater with a density of 150 kg/m3. This is due to the fact that the repair work of the facade systems, during the regulatory life, is not required. The effective life of facade systems with a density of mineral wool insulation of 150 kg/m3 and a thickness of 50 mm and 70 mm, for II and I climatic zones, respectively, is more than 25 years.