Ray tracing algorithm for accurate solar irradiance prediction in urban areas
Applied Optics
|October 17, 2014
Summary
A new ray tracing algorithm models solar radiation in cities, accounting for reflections and scattering. This approach is crucial for accurate urban solar irradiance and heat dissipation estimates.
Area of Science:
- Urban physics
- Solar energy modeling
- Computational electromagnetics
Background:
- Accurate modeling of solar radiation in urban environments is essential for understanding energy balance and thermal performance.
- Existing models often simplify complex interactions like multiple reflections and diffuse scattering.
Purpose of the Study:
- To develop and validate a ray tracing algorithm for modeling solar radiation interaction in complex urban settings.
- To quantify the impact of multiple reflections and diffuse scattering on solar irradiance and heat dissipation.
Main Methods:
- Developed a ray tracing algorithm incorporating multiple reflection and diffuse scattering.
- Ensured the model satisfies power balance at the surface element level.
- Validated the algorithm against experimental measurements in simple urban scenarios.
Main Results:
- The developed model accurately simulates solar radiation interaction with urban surfaces.
- Multiple-bounce interactions significantly influence solar irradiance calculations.
- Diffuse scattering is critical for reliable heat dissipation estimates in urban areas.
Conclusions:
- The validated ray tracing algorithm provides a rigorous method for assessing solar energy in cities.
- Accounting for multiple reflections and diffuse scattering is vital for accurate urban heat island and solar energy studies.
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