Performance Study of NePCM-nanofluid based PVT System

Photovoltaic thermal (PVT) systems integrated with Nanoparticle Enhanced Phase Change Materials Nanofluid (NePCM-nanofluid) are widely used in solar thermal systems for thermal energy storage, and they significantly improve energy efficiency. Solar thermal systems are particularly viable in the region of high-temperature and variable climatic conditions. It is crucial to understand the NePCM-nanofluid PVT systems' performance in this regard to adapt the technology to the hot regional conditions. Four solar systems—PV, PVT, PVT-PCM, and PVT-NePCM-nanofluid—were tested in Shegaon, Vidarbha, India, under real-time conditions. Integration of PVT-NePCM-nanofluid reduced PV cell temperature by 25.7°C during peak radiation. Comparative analysis revealed electrical efficiencies of 12.40% to 14.50% and thermal efficiencies ranging from 40% to 70%. The experimental analysis has been carried out at varied flow rate of nanofluid and optimal system performance was observed at a 7 LPM flow rate.