Study of changes indoor climate during a power failure heating system

Purpose. In assessing the conditions for compliance with climate SDS 3.3.6.042-99 "Sanitary norms of microclimate of production rooms" one of the requirements to the parameters of a microclimate temperature of the inner surface of the enclosure. To ensure the regulatory parameters of the microclimate in buildings in the cold season running the heating system. At the same time, as international experience shows in Ukraine has not yet resolved the issue of energy savings that lead to unnecessary use of coolants without temperature indoors and the heat loss through the building envelope. Therefore, it became necessary to carry out studies of temperature changes on the inner surfaces of the premises upon cooling due to the shutdown of the heating system, which allows to assess the compliance of the microclimate in the room with sanitary norms and, if necessary, manage the process and ensure the maintenance of its parameters. Methodology. Theoretical and experimental studies were carried out on the basis of fundamental knowledge in the field of thermal processes and techniques for solving problems of heat transfer, modeling of dynamic processes, methods and analysis of random processes, methods of mathematical statistics and forecasting. Findings. Based on these studies and the obtained values of the temperature dependence of the internal surfaces of enclosures form the basis of assessment of cooling the inner surface of the walls, which can be used to estimate the indoor climate in unsteady operation. Originality. The studies found that in the process of environmental influences and climatic conditions for long term use in structures due to structural changes (compaction, alteration mineralogical composition, carbonation, moisture migration, etc.) there are significant changes in thermal characteristics of the original, which reduces their thermal resistance and significantly affect the provision of normal conditions of indoor climate (change of thermal conductivity in the direction of increasing from 20.7% to 48.6%). Practical value. Studies changing thermal properties of building materials walling calculation and experimental methods showed a high convergence of their (the error does not exceed 5%), which allows the use of the proposed experimental method for rapid assessment of thermal properties of building materials walling.