Probability analysis of residential buildings coatings thermal reliability level on the territory of Ukraine

Abstract

The purpose of the work is to assess the level of thermal reliability of residential buildings combined with coatings in different regions of Ukraine and analyze territorial changes in thermal reliability indicators.

An indicator of combined coatings' thermal reliability is the probable duration of thermal failure condition according to the criterion of exceeding the permissible temperature difference between the indoor air and the inner surface of the enclosure. The indicator was determined according to the author's methodology for 26 regions of Ukraine (24 administrative regions, the Autonomous Republic of Crimea, and the Southern coast of Crimea) using regional statistical characteristics of atmospheric air temperature obtained in previous studies. Combined coatings, whose heat transfer resistance meets the requirements of thermal insulation current norms of buildings, Building Code B.2.6-31:2021 were analyzed. The probable duration of thermal failures in terms of the second temperature zone is somewhat shorter than under the first temperature zone. A schematic map constructed based on the results of calculations indicates that the probable durations of coatings thermal failures increase from the southwest to the northeast of Ukraine, changing from 153 to 221 minutes/year. The duration of coating thermal failure on the territory of the Southern coast of Crimea is much shorter.

Identified differences in the thermal failure duration on the territory of different regions of Ukraine indicate the feasibility of adjusting the norms of buildings' thermal protection to regulate more accurately the minimum necessary coatings' heat transfer resistance.