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Open AccessArticle

3D Dynamic Simulation of Heat Conduction through a Building Corner Using a BEM Model in the Frequency Domain

by Nuno Simões 1,2,*, Joana Prata 1,2 and António Tadeu 1,2
1
ITeCons—Institute for Research and Technological Development in Construction, Energy, Environment and Sustainability; Rua Pedro Hispano, 3030–289 Coimbra, Portugal
2
ADAI—LAETA, Department of Civil Engineering, FCTUC, University of Coimbra; Pólo II, Rua Luís Reis Santos, 3030–788 Coimbra, Portugal
*
Author to whom correspondence should be addressed.
Energies 2019, 12(23), 4595; https://doi.org/10.3390/en12234595
Received: 29 October 2019 / Revised: 29 November 2019 / Accepted: 2 December 2019 / Published: 3 December 2019
(This article belongs to the Section Energy and Buildings)
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 effect 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 effect 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. View Full-Text
Keywords: point thermal bridges; 3D building corner; dynamic heat transfer; boundary element method; frequency domain; hot box measurements. point thermal bridges; 3D building corner; dynamic heat transfer; boundary element method; frequency domain; hot box measurements.
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MDPI and ACS Style

Simões, N.; Prata, J.; Tadeu, A. 3D Dynamic Simulation of Heat Conduction through a Building Corner Using a BEM Model in the Frequency Domain. Energies 2019, 12, 4595.

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