Abstract
Polyisocyanurate (PIR) thermal insulation boards faced with carboard, plastic, aluminum, or multilayer facings are used for thermal insulation of buildings. Facing materials are selected according to the conditions of use of PIR products. At the corners of the building where these products are joined, facings can be in the direction of the heat flux movement and significantly increase heat transfer through the linear thermal bridge formed in the connection of PIR boards with facing of both walls. Analyzing the installation of PIR thermal insulation products on the walls of a building, the structural schemes of linear thermal bridges were created, numerical calculations of the heat transfer coefficients of the linear thermal bridges were performed, and the influence of various facings on the heat transfer through the thermal bridge was evaluated. Furthermore, an experimental measurement using a heat flow meter apparatus was performed in order to confirm the results obtained by numerical calculation. This study provides more understanding concerning the necessity to evaluate the impact of different thermal conductivity facings on the heat transfer through corners of buildings insulated with PIR boards.
Highlights
In the past few decades, tremendous development in the improvement of the energy efficiency of buildings has occurred and caused lower consumption of conventional fuel and CO2 emissions that generate the greenhouse effect [1,2]
Studies investigating the effect of PIR thermal insulation facings on heat loss have not been found, but very similar studies have been performed with vacuum insulation panels (VIP)
The experimental measurement clearly showed that the aluminum foil insert reduced the thermal resistance of the 100 mm thick PIR thermal insulation board twice, the insertion area represented only about
Summary
In the past few decades, tremendous development in the improvement of the energy efficiency of buildings has occurred and caused lower consumption of conventional fuel and CO2 emissions that generate the greenhouse effect [1,2]. Theodosiou (2008) presented a study on representative wall thermal insulation configurations used in Greek buildings, in order to investigate the impact of the thermal bridges on the energy consumption [22]. When calculating the heat transfer coefficient of a partition and modelling linear (and point) thermal bridges, the joints passing through the thermal insulation are evaluated [1,26]; the influence of facings is not evaluated. Studies investigating the effect of PIR thermal insulation facings on heat loss have not been found, but very similar studies have been performed with vacuum insulation panels (VIP) These studies analyzed the influence of very thin and high thermal conductivity facings (usually, aluminum foil) on the heat loss and the formation of linear thermal bridges around the joints between the two connected plates [27,28].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
