Mathematical model and numerical analysis of uniform and axially graded volumetric solar receivers with radiation boundary condition

Key Points

• Uniform and axially graded volumetric solar receivers demonstrate distinct heat transfer characteristics, optimizing solar energy usage.
• The mathematical model predicts performance variations under different radiation boundary conditions, enhancing design accuracy.
• Numerical analysis identifies effective strategies for improving energy absorption in solar receivers, tailored to specific use cases.
• This research may enable more efficient solar energy systems; further validation in real-world settings is needed.