resumo
The high thermal conductivity of carbon based nanostructures (CNs) has been recognized appropriate to be integrated into phase change materials (PCMs) to enhance the overall thermal properties of the obtained nanocomposites. The equilibrium of the possibility to enhance the thermal conductivity of the PCMs and the latent heat capcity are the key for their ability to store or dissipate a large amount of energy in a short period of time. This paper gives an update overview summarizing the state-of-the-art concerning nanocomposites prepared using PCMs and CNs with emphasis on the improvement of the latent heat capacity and of the thermal conductivity. Focus is directed towards experimental research studies regarding the enhancement of the thermal properties (thermal conductivity and the latent heat capacity) of PCMs obtained by the addition of the CNs by means of the encapsulation method. The majority of the reported research studies focus mainly on the thermal characterization of PCMs nanocomposites, however there is scarce information about the mechanisms explaining why/how the thermal properties are enhanced. This review outlines the results of the thermal conductivity and the latent heat capacity of PCMs/CNs nanocomposites, trying to identify the features that lead to the improvement of their thermal properties.
palavras-chave
SODIUM-SILICATE PRECURSOR; TEMPERATURE WASTE HEAT; CHANGE MATERIALS PCMS; SOL-GEL METHOD; OF-THE-ART; STEARIC-ACID; CONDUCTIVITY ENHANCEMENT; GRAPHENE NANOPLATELETS; BUILDING APPLICATIONS; GRAPHITE COMPOSITE
categoria
Science & Technology - Other Topics; Energy & Fuels
autores
Amaral, C; Vicente, R; Marques, PAAP; Barros-Timmons, A
nossos autores
Ana Margarida Madeira Viegas de Barros Timmons
Professor associado
Cláudia Patrícia Cândido do Amaral
Estudante de doutoramentoagradecimentos
This work was developed under the scope of the project: MF-Retrofit - Multifunctional facades of reduced thickness for fast and cost-effective retrofitting [EeB.NMP.2013-1 Grant Agreement to: 609345] and within the scope of the project CICECO - Aveiro Institute of Materials, POCI-01-0145-FEDER-007679 (FCT Ref. UID/CTM/50011/2013) and TEMA Centre for Mechanical Technology and Automation (UID/EMS/00481/2013), financed by national funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement. Thanks are due to University of Aveiro, FCT/MEC for the financial support to the research Unit RISCO - Aveiro Research Centre of Risks and Sustainability in Construction (FCT/UID/ECI/04450/2013). Paula Marques thanks the grant FCT IF/00917/2013.