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Optical properties and stability of water-based nanofluids mixed with reduced graphene oxide decorated with silver and energy performance investigation in hybrid photovoltaic/thermal solar systems |
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| Authors: | A S Abdelrazik K H Tan Navid Aslfattahi R Saidur Fahad A Al-Sulaiman |
| Affiliation: | 1. Mechanical Engineering Department, King Fahd University of Petroleum & Minerals, Dhahran, Saudi Arabia;2. Research Center for Nano-Materials and Energy Technology (RCNMET), School of Science and Technology, Sunway University, Bandar Sunway, Selangor, Malaysia;3. Mechanical Engineering Department, King Fahd University of Petroleum & Minerals, Dhahran, Saudi Arabia
Center of Research Excellence in Renewable Energy (CoRERE), King Fahd University of Petroleum & Minerals, hahran, Saudi Arabia |
| Abstract: | The present work investigates the effect of the nanoparticles concentration on the optical and stability performance of a water-based nanofluid in solar photovoltaic/thermal (PV/T) systems experimentally and numerically. A novel nanofluid is formulated with the inclusion of the reduced graphene oxide decorated with silver (rGO-Ag) nanoparticles in water. Five different concentrations of nanoparticles in the range from 0.0005 to 0.05 wt% is suspended in water to prepare the samples. Optical properties are measured using UV-Vis. The UV-Vis absorption analysis reveals that all samples show consistent optical absorption coefficient (α) at higher value (more than 3 cm?1) in the range of 1.5 to 4 eV. The application of optical filtration (OF) using water/rGO-Ag nanofluid in hybrid PV/T system presented more solar energy absorption through the OF. The hybrid system shows better performance at concentrations less than 0.0235 wt% compared to the PV system without integration with optical filtration. The hybrid solar PV/T system with OF using water/rGO-Ag nanofluid is able to produce thermal energy with efficiencies between 24% and 30%. |
| Keywords: | nanofluid optical filtration PV/T solar energy transmittance water/rGO |