Akademik Veri Yönetim Sistemi
International Journal of Hydrogen Energy, cilt.98, ss.657-672, 2025 (SCI-Expanded)
This study investigates the energy and exergy efficiencies of two energy systems, PV-PEM and PVT-PEM, with a focus on their electricity and hydrogen production capabilities, carbon savings, and economic contributions. The motivation behind this work is to understand how different operational parameters, such as tilt angles, cooling flow rates and daily solar radiation influence the performance of these systems. The hypothesis is that varying tilt angles, cooling flow rates, and daily solar radiation significantly affect the system efficiencies and outputs. Simulations were conducted using EES software for three tilt angles (10°, 25°, 40°) for PVs and PVTs and three cooling flow rates (0.300 kg/s, 0.375 kg/s, 0.450 kg/s) for PVT systems, with the study focusing on a selected day in July between 8:00 and 17:00. The results indicate that the maximum daily electricity generation reached 338.85 MJ for PV systems at a 10° tilt and 354.69 MJ for PVT systems at 0.450 kg/s cooling flow. Hydrogen production also showed maximum daily values of 1619.6 g for PV-PEM and 1689.7 g for PVT-PEM at the 10° tilt angle. The maximum energy and exergy efficiencies were found in the PVT-PEM system with a cooling flow rate of 0.450 kg/s at a 40° tilt, with values of 49.85% and 9.723%, respectively. The maximum carbon savings were 38.03 kg for the PV-PEM system and 76.96 kg for the PVT-PEM system, both at optimal operational conditions. Economically, the maximum contributions were $11.63 for the PV-PEM system at a 10° tilt angle and $49.53 for PVT-PEM at 0.450 kg/s cooling flow for a day. The findings highlight that while increasing tilt angles decreases the performance, higher cooling flow rates improve efficiency, production, carbon savings, and economic benefits. As a result, the novelty of this research lies in its comprehensive analysis of the energy and exergy efficiencies, hydrogen production, carbon savings, and economic contributions of PV-PEM and PVT-PEM systems under varying operational parameters—a focus not previously explored in the literature. By introducing a novel approach that considers tilt angles, cooling flow rates, and daily solar radiation, this study provides valuable insights for optimizing renewable energy systems and advancing sustainable energy solutions.