Akademik Veri Yönetim Sistemi
15th International Exergy, Energy, and Environment Symposium (IEEES-15), 19 - 22 Aralık 2024, ss.139-144, (Tam Metin Bildiri)
The utilization of solar energy to generate electricity and cooling effects in remote areas sustainably still poses lots of challenges to researchers. Concentrated solar power technology has gained rapid pace in the area of sustainable energy. This study investigates numerically an innovative tri-generation system powered by solar energy for the production of hydrogen, cooling effect, and electrical power. A comparative study of energy and exergy efficiency has been performed by incorporating different types of thermodynamic cycles with and without reheat and regenerative effects. The tri-generation system consists of a field of solar towers, a simple Rankine cycle for the production of electrical power, an electrolyzer for hydrogen production, and a vapor absorption refrigeration cycle for refrigerating effect. The effect of hydrogen production and power generation has been analyzed by varying different parameters like Direct Normal Irradiance (DNI), and mass flow rate of molten salt (60% NaNO3 & 40% KNO3). Among the different systems, we have found that the reheat system has the highest energy and exergy efficiency of around 48% and 50%, respectively. In comparison, the simple Rankine cycle has the lowest energy and exergy efficiency of around 34% and 36%, and the third system, with regeneration, has energy and exergy efficiency of around 36% and 37.5%, respectively. With the assumed heliostat field area of 1000 m2, the hydrogen production rate was highest in the reheat cycle, increasing from 0.011 kg/s to 0.019 kg/s by the increment in the DNI. Conversely, the simple Rankine cycle produces the least amount of hydrogen, rising from 0.006 kg/s to 0.011 kg/s as the DNI increases. Finally, the regenerative cycle's hydrogen generation rate increased from 0.007 kg/s to 0.012 kg/s due to the DNI's fluctuation from 600 to 1000 W/m2.