RT journal article
T1 Thermal Energy Storage in Concrete by Encapsulation of a Nano-Additivated Phase Change Material in Lightweight Aggregates
A1 Carrillo Berdugo, Iván
A1 Gallardo Bernal, Juan Jesús
A1 Ruiz Marín, Nazaret
A1 Guillén Domínguez,  Violeta
A1 Alcántara Puerto, Rodrigo
A1 Navas Pineda, Francisco Javier
A1 Poce Fatou, Juan Antonio
A2 Máquinas y Motores Térmicos
A2 Química Física
K1 building materials
K1 lightweight aggregates
K1 nanomaterials
K1 phase change materials
K1 thermal comfort
K1 thermal energy storage
AB This work discusses the applicability of lightweight aggregate-encapsulated n-octadecane with 1.0 wt.% of Cu nanoparticles, for enhanced thermal comfort in buildings by providing thermal energy storage functionality to no-fines concrete. A straightforward two-step procedure (impregnation and occlusion) for the encapsulation of the nano-additivated phase change material in lightweight aggregates is presented. Encapsulation efficiencies of 30–40% are achieved. Phase change behavior is consistent across cycles. Cu nanoparticles provide nucleation points for phase change and increase the rate of progression of phase change fronts due to the enhancement in the effective thermal conductivity of n-octadecane. The effective thermal conductivity of the composites remains like that of regular lightweight aggregates and can still fulfil thermal insulation requirements. The thermal response of no-fines concrete blocks prepared with these new aggregates is also studied. Under artificial sunlight, with a standard 1000 W·m−2 irradiance and AM1.5G filter, concrete samples with the epoxy-coated aggregate-encapsulated n-octadecane-based dispersion of Cu nanoparticles (with a phase change material content below 8% of the total concrete mass) can effectively maintain a significant 5 °C difference between irradiated and non-irradiated sides of the block for ca. 30 min.
PB MDPI
SN 2079-4991
YR 2024
FD 2024
LK http://hdl.handle.net/10498/35700
UL http://hdl.handle.net/10498/35700
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 22-sep-2026