Investigation of the influence of thermal conductor inclusions on the microclimate of premises under emergency situations in the systems of heat supply

Abstract. Purpose. Investigation of the temperature of the internal surface of the enclosing structure for heat-conducting connection (diaphragm, through-seam from the solution, joint of panels, rigid bonds of the walls of lightweight masonry, fachwerk elements, etc.) which must be no lower than the dew point of the internal air at the design winter temperature of the outside air. 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. Analysis of the calculations performed using the dependence (10) indicates a significant (by 5-9 ° C) decrease in temperature on the inner wall surface in the vicinity of the metallic thermal conductive inclusion in comparison with the wall temperature outside the thermal conductive inclusion. In the presence of nonmetallic heat-conducting inclusions, their effect is noticeable (the temperature decreases by 2-4 ° C) in comparison with the temperature on the inner surface of a homogeneous wall. Originality. The dependencies allowing to determine the temperature of the inner surface of the enclosing structure in the area of metallic and non-metallic heat-conducting inclusions in emergency situations in heat supply systems are established. Practical value. The conducted researches testify to the possibility of intensive condensation of moisture in the area of both metallic and nonmetallic heat-conducting inclusions, and with prolonged cooling of the building's premises (more than 2-3 days), freezing of the wall with all the consequences resulting from this unfavorable phenomenon (up to the destruction of the structure).