Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6533932 | Solar Energy Materials and Solar Cells | 2018 | 5 Pages |
Abstract
This work reports on the characterization of new heat transfer fluids consisting in dispersions of functionalized graphene nanoplatelets (fGnP) in Havoline XLC Premixed 50/50 base fluid. Optical, stability and rheological properties have been considered, with the aim to assess the nano-suspension potential for volumetric direct solar absorbers. Nanoparticle addition leads to a considerably higher sunlight absorption with respect to the pure base fluid even at the investigated extremely low concentrations (0.005% and 0.05% wt). Rheology tests show a Newtonian behaviour in the shear rate range between 10 and 1000â¯sâ1. Viscosity and thermal conductivities do not significantly increase with respect to the pure base fluid, showing that these new fluids will not require additional pumping powers to flow.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Elisa Sani, Javier P. Vallejo, David Cabaleiro, Luis Lugo,