Molten Salt/Metal Foam/Graphene Nanoparticle Phase Change Composites for Thermal Energy Storage

Abstract

effective thermal conductivities of the salt/graphene/metal foam composites were distinctly 1 enhanced, while the latent heats of the present composite PCMs were smaller than that of pure salt 2 to some extent. Furthermore, the phase change temperatures shifted slightly in the presence of porous metal foam and graphene, while the addition of graphene could compensate for the reduction of specific heats of the composite PCMs caused by metal foam. Finally, it was found that the thermal effusivities of the salt/graphene/metal foam composites were larger than those of pure salt, indicating the increments of 110~270% in solid state and 150~360% in liquid state, respectively. The fundamental information of the nanocomposites with porous media could broaden their application in thermal energy storage system.

Structure of Industrial Sacrificial Fragile Cementitious Foams

“…Figure b shows the SFCF blocks that were readily prepared for installation, and Figure c shows the well-installed EMAS in Nyingchi Mainling Airport, Tibet, China. As a type of foamed composites with high collapse deformations under relatively low loads, most of the volume of SFCFs should be occupied by the air voids (over 80%), while the skeleton occupies the rest of the volume. − The porous structure of foam composites possesses some special properties, such as high thermal resistance, excellent sound absorption, and a high potential for energy storage, enabling wide applications in the energy system as well as in our daily life. − …”