Abstract
The article presents the results of an energy audit of a multi-storey residential building in the city of Semey. The object of the study is a panel residential building located on Fizkultura Street, which was selected because its heat consumption is higher than that of similar buildings and visible signs of increased heat losses are observed on its façades. The aim of the work is to determine heat losses through the building envelope using thermographic techniques and to justify a set of technical and organizational measures aimed at improving its thermal and energy efficiency. Infrared thermography (with an Easir-9 thermal imager), heat engineering calculations and normative approaches to estimating the annual heat consumption were used as the main research methods. During the measurements, the outdoor and indoor air temperatures, surface emissivity, distance to the object and the basic metrological characteristics of the instrument were taken into account. As a result, concentrated areas of thermal bridges were identified at panel joints, window openings, the plinth zone and engineering nodes, which make a significant contribution to the total heat losses of the building. The proposed set of energy-saving measures includes additional façade insulation, hydraulic balancing of the heating system, installation of radiator thermostatic valves and implementation of heat metering devices. The economic assessment has shown that the implementation of these measures can reduce heat consumption by approximately 15-20% and decrease operation and maintenance costs for the residents. The practical significance of the study lies in providing a comprehensive approach that can be applied to the existing housing stock, as well as in forming a methodological basis for similar buildings in Semey and other cities of the Republic of Kazakhstan.