Browsing by Author "OTMANI.A (Encadrant)"

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    CFD-Based Simulation of Natural Convection in Enclosures for Photovoltaic Module Cooling Applications
    (National Higher School of Technology and Engineering – Annaba, 2025) MADACI Younes Taki Eddine; OTMANI.A (Encadrant)
    This thesis presents a CFD-based study on improving passive cooling of photovoltaic (PV) modules using natural convection. Different configurations were simulated, including increased water layer volume, cylindrical water channels, and replacement of water with phase change material (PCM) and moist sand. Results showed that moist sand provided the best thermal regulation due to its high thermal inertia and evaporation effect. The numerical model was experimentally validated, confirming the reliability of the simulations. The study highlights cost-effective, energy-free solutions for efficient PV cooling.
  • Thumbnail Image
    Item
    Design and Optimization of a Combined Cooling and Heat Recovery System for Photovoltaic Panels
    (National Higher School of Technology and Engineering-Annaba, 2025) MADACI Younes Taki Eddine; OTMANI.A (Encadrant)
    The main goal of this study is, on the one hand, to develop an effective cooling system to enhance PV efficiency, and, on the other hand, to use the extracted heat in a brine preheating process, with the aim of improving the efficiency of the brine electrolysis, which has been investigated in a separate study. A set of indoor and outdoor experiments evaluated active and passive cooling techniques including a gravity-fed coil system, natural convection, Water-Filled Heat Sink, and moist sand-based evaporative cooling. Results demonstrated that effective thermal management significantly enhances PV efficiency. The moist sand configuration achieved over 20 °C temperature reduction and an efficiency gain of up to 2%, proving the potential of low-cost, energy free cooling solutions combined with heat recovery.