Details

Autor(en) / Beteiligte

• Abdelrazik, A. S.
• Tan, K. H.
• Aslfattahi, Navid
• Saidur, R.
• Al‐Sulaiman, Fahad A.

Titel

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

Ist Teil von

• International journal of energy research, 2020-11, Vol.44 (14), p.11487-11508

Ort / Verlag

Chichester, UK: John Wiley & Sons, Inc

Erscheinungsjahr

2020

Quelle

Wiley Online Library

Beschreibungen/Notizen

• Summary 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%. Experimental and numerical evaluation of the nanofluid optical‐performance Stability assessment using new methods dependent on the optical properties High rate of transmittance and absorption changes at low concentrations Optical filtration with water/rGO‐Ag (<0.0235 wt%) is better than single PV Higher transmittance and better electrical efficiency compared to water/Ag