Phase Change Material Particles and Their Application in Heat Transfer Fluids - Low-cost Nanomaterials: Toward Greener and More Efficient Energy Applications - page 459

Fig. 8 continued

have a positive interfacial tension (i.e., surface energy) in emulsion. In addition,
these nanoparticles are highly dispersed. The polymer surfactants appear to provide
sufficient steric stabilization despite the strong cohesion forces among molten metal
nanodroplets.

4.1.2 Thermal Conductivity of Metallic PCM Fluids

The thermal conductivity of the pure PAO and dispersions of Indium nanoparticles
in PAO, and as well as the relative thermal conductivity, are plotted against
temperature in Fig. 9 . Results estimated from the Maxwell Model are also shown
for comparison. The relative thermal conductivity is defined as k nf k o , where k o
and k nf are thermal conductivity of the base fluids and dispersions of Indium
nanoparticles in PAO, respectively. The thermal conductivity of the PAO at room