@ARTICLE{10.21494/ISTE.OP.2024.1101, TITLE={Numerical Study of the Influence of Operating Conditions on the Overall Efficiency of a Photovoltaic Thermal System}, AUTHOR={Badiaa RTIMI , Hiba AKROUT , Hanen AJARI , Khaoula HIDOURI , Ali BENHMIDENE, }, JOURNAL={Entropy: Thermodynamics – Energy – Environment – Economy }, VOLUME={5}, NUMBER={Special issue IREEC 2}, YEAR={2024}, URL={https://openscience.fr/Numerical-Study-of-the-Influence-of-Operating-Conditions-on-the-Overall}, DOI={10.21494/ISTE.OP.2024.1101}, ISSN={2634-1476}, ABSTRACT={Photovoltaic (PV) panels are an integral part of solar energy systems, converting sunlight directly into electricity. With the increasing demand for renewable energy sources, PV panels have gained significant attention due to their ability to generate clean and sustainable power. However, the performance of PV panels is influenced by various factors, including their design, materials, operating conditions, and environmental factors. Cooling is a crucial aspect in the operation of PV panels, as high temperatures can significantly affect their efficiency and overall performance. Water and nanofluid cooling have emerged as promising strategies to mitigate temperature-related issues and enhance the energy output of PV panels. This abstract focuses on the application of water and nanofluid cooling techniques in PV panels and their impact on performance. This work explores the influence of parameters such as mass flow rate, nanofluid concentration, and nanofluid type on cell temperature reduction and resulting thermal and electrical efficiencies of a PV panel situated in the Gabes region. The study considers three cases: a standalone PV panel, a PV/T system with water cooling, and a PV/T system with nanofluid cooling. To maximize the interaction between the cooling fluid and the back surface of the solar panel, the tested fluids are circulated through a rectangular heat exchanger.}}