The absorption performance of a direct absorption solar collector (DASC), as the main method of solar thermal application, affects the performance of the entire solar thermal utilization system. The enhancement of t. d cross-sectional diameter of the nanoparticle d1 diameters. Energy plays a crucial role with the continuous improvement of human productivity. The search for and utilization of renewable energy is an unavoidable problem for hum. As shown in Fig. 1, two types of three-layer core-shell nanoparticles (spherical and cylindrical) with excellent absorption properties are used as coupling to prepare the SICN. Amon. 3.1. Grid independence verificationTo ensure the reliability of the calculation results, grid independence verification is conducted. In this study, the average absorption intens. In this study, spherical and cylindrical composite nanoparticles were embedded onto the surface to enhance the absorption efficiency of sunlight. First, by calculating the average abso. Han Gong: Conceptualization, Methodology, Software, Formal analysis, Writing – original draft. Zheng Cui: Software, Resources, Visualization, Funding acquisiti.