The influence of leakage of insulating layer on thermal parameters of ethics system

Abstract

The purpose of this paper is to show a part of results of research in examination of rigid material used for thermal insulation with modified structure. Modification of the material was relying on making of parallel perforations to the direction of the heat and moisture flow. The base solid material was an expanded polystyrene (15EPS-70-040) with board thickness of 5 cm. In the base material the circular perforations with diameter of 1, 3 and 5 mm were done, on the 2 cm x2cm grid (for 15EPS-70-40 material additional samples were done with perforations 7,9 and 11 mm). The researches were divided to preliminary and essential ones. The scope of research included the measurement of water vapour factor’s transfer as well as the measurement of heat conductivity factor; the thermographic control of bulkhead insulated by solid and perforated Styrofoam, the simulation of thermalmoisture phenomena in analyzed bulkheads. The essential research was conducted in the Laboratory of Solar Energy Usage in the Faculty of Architecture. Two wall arrangements were analyzed in the research. The common element was the wall’s carrying construction. The first bulkhead was insulated by the material with a modified structure - the styrofoam with 5mm perforation. The relative temperature and humidity of external and internal air was registered, on the border of the bulkhead layers as well. The external climate parameters were registered by the Kombi weather station. In the framework of research the mathematical model of coaxial transport processes was verified. Moreover, selected thermal-moisture parameters of wall arrangements were specified. These were as follows: the heat conductivity factor U, the dimensionless temperature of internal surface fRsi, the water vapour flow.