Numerical Study and Thermodynamic Analysis on the Effects of Quadrant Circular Obstacles Located on the Absorber of Solar Chimney Power Plant

Solar chimney power generation using solar heat, which is an important energy source as a renewable energy, has been attempted in various studies because it is possible to generate electricity with simple equipment. In this study, using ANSYS Fluent, a commercial numerical analysis program, the changes in the thermal and fluid properties of air flow according to the presence and number of quadrant-shaped obstacles on the solar chimney absorber were quantified and visualized. Exergy, a thermodynamic useful energy, was calculated using quantitative data such as speed and temperature, and quantified using the concept of exergy efficiency presented in the existing literature. As a result, it was confirmed that the obstacle promotes the turbulence of the air flow and heat transfer, thereby increasing the exergy efficiency.