Material of Thermal Insulation Affects Heat Gains in the Summer Period

Abstract:

Buildings with light-weight roof structures tend to suffer from overheating of attic spaces during the summer period. One of the methods for improving the indoor thermal comfort with no energy consumption is reducing the heat flux passing through the building envelope. In particular, this can be achieved by increasing the thermal inertia of the roof, specifically, by choosing materials with relatively high density and high specific heat capacity. This article focuses on evaluating of the roof assembly of an inclined insulated non-ventilated roof which meets the requirements for the passive house standard. A dynamic Comsol simulation with harmonic fluctuation of the exterior temperature was used to express the impact of the structure on the temperature damping and the time lag. The period of 7 days was screened. As a result temperature profiles of several material variants are compared.

• Periodical: Applied Mechanics and Materials (Volume 861)
• Pages: 221-228
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.861.221
• Online since: December 2016
• Authors: Sylvia Svobodová*, Libor Matějka
• Keywords: Attic Room, Heat Transfer, Pitched Roof, Thermal Inertia

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