Journal of Thermal Analysis and Calorimetry, cilt.150, ss.14091, 2025 (SCI-Expanded)
This study presents an innovative approach to enhancing solar chimney power plants (SCPPs) by integrating geothermal heating to simulate geothermal well conditions. The experimental setup included a solar collector with a 12 m diameter and an 8 m tall chimney, along with multi-layered and copper pipes totalling 1000 m to optimise heat transfer. Results showed that integrating geothermal heating significantly enhanced the system’s thermal performance, increasing air velocity to 5.8 m s-1 during peak operation compared to 3.3 m s-1 under standard nighttime conditions. Additionally, the central temperature within the collector (T5) rose to 68.3°C during the day, compared to 9.2°C in the early morning. Under traditional operation (without geothermal heating), power generation ceases entirely at night or during cloudy conditions. However, with the geothermal integration, the system demonstrated stable thermal performance and continuous energy production over 24 hours. On cloudy days, the inlet temperature (T0) reached 33.7°C at peak, while the outlet temperature (T6) climbed to 45.3°C, highlighting the system’s ability to sustain efficient heat transfer despite reduced solar radiation. These results underscore the importance of integrating solar and geothermal energy to ensure continuous power generation. The hybrid system proved to be a sustainable and efficient energy solution, offering consistent performance even under variable weather conditions.