Optimizing concentrated photovoltaic module efficiency using Nanofluid-Based cooling

Abstract

Photovoltaic technology offers a promising and environmentally sustainable solution to global energy demands. However, its efficiency is often compromised by elevated temperatures caused by intense solar radiation. Effective cooling strategies are essential to enhance electricity generation and prolong the lifespan of photovoltaic cells. This study explored the enhancement of electricity production in concentrated photovoltaic systems through the use of Al₂O₃/water nanofluid as a cooling medium. An experimental analysis evaluated the thermal and electrical efficiencies of cooled versus uncooled concentrated photovoltaic panels. Aluminum oxide nanoparticles were utilized in various loadings ranging from 0.2 wt% to 0.5 wt% at a flow rate of 1.25 L/min to assess their impact on concentrated photovoltaic performance. The results demonstrated that 0.5 wt% Al₂O₃/water nanofluid achieved the most significant reduction in PV surface temperature lowering it by 55 % compared to an uncooled panel. Under peak solar intensity, the electrical output of the concentrated photovoltaic panels was recorded as 43.22 Wh for the uncooled panel. In contrast, the cooled panels produced 48.87 Wh with water, 51.01 Wh with 0.2 wt% Al₂O₃/water nanofluid, and 54.30 Wh with 0.5 wt% Al₂O₃/water nanofluid. For the 0.5 wt% Al₂O₃ nanofluid, the electrical and thermal efficiencies were measured at 34.80 % and 64.42 %, respectively.