Effect of reduced graphene oxide as nanofluid on solar parabolic trough collector receiver model

Abstract

The study of reduced graphene oxide as nanofluid with base fluid of volume fraction (10%Vol) was prepared to perform the thermal investigation on solar parabolic trough collector receiver model. The peak intensity of nanoparticle size distribution and crystal structure behaviour was employed by transmission electronic microscopy (TEM) and X-ray diffractometer (XRD) techniques. In order to enhance thermal performance of the receiver model between evacuated and non-evacuated conditions are established. For testing of physical parameters of Reynolds number, friction factor and average Nusselt numbers with fixed magnitude of heat flux at duration of time period. In this evacuated and non-evacuated model, the friction factor and average Nusselt number were slightly decreased for rGO/distilled water and comparatively increased for base fluids. Due to addition of nanoparticles, the thermo-physical parameters of nanofluid had thinner layers of thermal boundary of particle size inside the fluid of pipe wall sections of evacuated receiver model are more efficient heat transfer capability compared to non-evacuated model.