Characterization of a Wall System with Dynamic Thermal Insulation-Experimental Campaign and Numerical Simulation

• Tipo: Artigo em Revista Científica Internacional
• Data: 2023

Autores

Almeida, RMSF (Autor) Outra; Teles Ribeiro, M (Autor) Outra; Eva Barreira (Autor) FEUP

Revista

Título: Energies

Vol. 75

Página Final: 6402

ISSN: 1996-1073

Editora: MDPI

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-00Y-YW1

DOI: 10.3390/en16176402

Abstract (EN): Dynamic thermal insulation systems (DTISs) can adapt to external environment conditions and help to reduce energy consumption and increase occupants' thermal comfort, contributing towards the mitigation of overheating. DTISs adjust their configuration to optimize heat transfer through the facade. In this study, the performance of a DTIS was assessed through laboratory tests and numerical simulation. The DTIS is based on the ventilation of an air gap that facilitates the heat exchanges between the exterior and the interior. To extend the results of the experimental campaign, a set of scenarios was assessed based on numerical simulation. The results of the laboratory tests showed that the R-value obtained when the mechanical ventilation of the air gap is off (insulation state) is 3.89 m2.& DEG;C/W. In comparison, when it is on (conductive state), the R-value is 1.56 m2.& DEG;C/W, which corresponds to a reduction of approximately 60%. The results of the simulations showed that, when the shading system was on, the higher U-value was useful more than 50% of the time with discomfort, increasing to 75% when the shading system was off.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 16