3D Modeling of the Thermal Transfer through Precast Buildings Envelopes

In this paper, a finite-element-based model is being introduced and developed, using the Cast3m (CEA, Paris, France) simulation tool, to evaluate the thermo-mechanical behavior of a small-scale test bed. In fact, many studies on thermal behavior of cavities have been carried out in literature. Howev...

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Bibliographic Details
Published in:Energies (Basel) 2021-07, Vol.14 (13), p.3751
Main Authors: Berrabah, Soukayna, Moussa, Mohamed Ould, Bakhouya, Mohamed
Format: Article
Language:English
Subjects:
Building construction
Building envelopes
Convection
Energy consumption
energy efficiency
Energy harvesting
finite element method
Finite volume method
Functional materials
Green buildings
Heat
Heat transfer
Infrared cameras
infrared measurement
Mathematical models
Mechanical properties
Model accuracy
Prefabricated buildings
Radiation
Rayleigh number
Regulation
Simulation
Stress concentration
Thermal analysis
Thermomechanical properties
Transmittance
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Summary:In this paper, a finite-element-based model is being introduced and developed, using the Cast3m (CEA, Paris, France) simulation tool, to evaluate the thermo-mechanical behavior of a small-scale test bed. In fact, many studies on thermal behavior of cavities have been carried out in literature. However, none of them took into account the co-existence of all thermal phenomena (conduction, convection, internal/external radiation). The work presented in this paper presents a thermo-mechanical model, which aims to combine, in a holistic way, these phenomena. An experimental validation of the thermal model has been first carried out using an infrared camera and DS18B20 (Maxim Integrated Products, Dallas, TX, USA) numerical sensors. Results are reported and show the accuracy of the proposed model since both numerical and experimental values of heat transmittance fit together. The main objective is to evaluate heat losses through the walls, by means of heat transmittance calculation, and proposing new functional materials that will help in energy harvesting, as a perspective of this work. As for the mechanical study, it was meant to investigate the distribution of the mechanical stress towards the building envelope submitted to its own weight. Results showed that the stress is uniformly distributed on the lateral walls of the structure as well as on the floor.
ISSN:1996-1073
1996-1073
DOI:10.3390/en14133751