Maksymenko M. Heat-insulating products with unventilated air layers shielded by heat-reflecting material

The dissertation work is devoted to increase of efficiency of use of reflective isolation as it is specified in many works, practically do not change in the conditions of high and low temperatures, and also in the conditions of high humidity and vibration. The results of studies of the passage of heat flow through samples of walls made of plasterboard, chipboard, glass, polycarbonate and extruded polystyrene are obtained. It was found that in the air layer located in front of the foil, the temperature propagates nonlinearly, forming "jumps". That is, the air layer heats up more than the theoretically calculated data. Qualification tests of thermal resistance of prototypes made of extruded polystyrene foam with two closed air layers separated by a foil material with a total thickness of 60 mm were carried out.