Autor(es): Simões, Nuno ; Prata, Joana ; Tadeu, António
Data: 2019
Identificador Persistente: https://hdl.handle.net/10316/106884
Origem: Estudo Geral - Universidade de Coimbra
Assunto(s): point thermal bridges; 3D building corner; dynamic heat transfer; boundary element method; frequency domain; hot box measurements
This paper sets out a three-dimensional (3D) boundary element method (BEM) formulation in the frequency domain to simulate heat transfer through a point thermal bridge (PTB) at a corner in a building envelope. The main purpose was to quantify the dynamic e ect of a geometrical PTB in terms of distribution of temperatures and heat fluxes, which is useful for evaluating moisture condensation risk. The numerical model is first validated experimentally using a hot box to measure the dynamic heat behavior of a 3D timber building corner. The proposed model is then used to study the dynamic thermal bridging e ect in the vicinity of a 3D concrete corner. Given the importance of the risk of condensation, this study looks at the influence of an insulating material and its position on the temperature and heat flux distribution through the PTB under steady state and dynamic conditions.
