The Green Future Building Through Energy Optimization in High‐Rise Buildings

This study investigates the application of photovoltaic (PV) systems in 30‐meter high‐rise residential buildings in Tehran, evaluating the impact of four geographical orientations (north, south, east, and west). Using PV*SOL software, system energy production and performance were simulated based on Tehran's specific climatic conditions and solar radiation data. The primary goal is to assess the influence of panel orientation on energy efficiency, cost‐effectiveness, and environmental benefits. Results show that south‐facing systems, receiving 2151.86 kWh/m² of global radiation, achieved the highest energy yield of 57,937 kWh annually, with a 6.9‐year payback period. In contrast, north‐facing systems generated only 36,328 kWh/year and required 11.1 years for cost recovery. South‐oriented systems also achieved the greatest environmental benefit, reducing CO₂ emissions by 27,196 kg per year. The economic analysis demonstrates that optimized orientation significantly improves long‐term financial viability. This study highlights the strategic importance of rooftop PV deployment in high‐rise buildings to enhance energy efficiency and reduce urban energy consumption. The findings also provide a valuable reference for urban renewable energy planning in cities with similar climate conditions. Future research should include the integration of energy storage systems and assess long‐term dust accumulation impacts on PV system performance in dense urban settings.