Test studies demonstrate improved energy efficiency in photovoltaic thermal collectors using graphene nanofluids, indicating potential environmental benefits.
Key Points
The study aims to improve the performance of photovoltaic thermal collectors using graphene nanoplatelet/water nanofluid.
Test studies on PV/T A and PV/T B using 0.05% and 0.1% nanofluids.
Flow rate of 0.4 L/min with mean solar power of 146 W.
Assessment of energy, exergy, and environmental-economic performance.
PV/T A and B cooled 9% and 14%, respectively, under solar power.
Electrical outputs increased by 38.31% for PV/T A and 48.74% for PV/T B.
Thermal power efficiency of 37.20 W and 57.91 W for PV/T A and B respectively.
First and second law efficiencies were 7.67% and 35.86% for PV/T A, and 8.24% and 11.9% for PV/T B.
CO2 emissions reduced by 84.88 kg/year for PV/T A and 139.64 kg/year for PV/T B.