Angular selective broadband radiative cooling based on Berreman mode.

Area of Science:

• Materials Science
• Nanophotonics
• Sustainable Building Technologies

Background:

• Conventional radiative coolers (RCs) are effective but limited to horizontal installations.
• Their directional thermal emission restricts application on building facades.

Purpose of the Study:

• To propose and analyze an oblique radiation-angled photonic structure (ORAPS) for facade-integrated radiative cooling.
• To enhance the applicability of radiative cooling technologies in urban environments.

Main Methods:

• Theoretical design principles for ORAPS.
• Simulation-based analysis of cooling performance under various environmental conditions.

Main Results:

• ORAPS facilitates directed thermal emission towards outer space, avoiding adjacent structures.
• The structure reflects incoming radiative heat perpendicularly to the panel surface.
• Simulations confirm effective cooling performance across diverse environmental parameters.

Conclusions:

• ORAPS technology expands the application of radiative cooling to building facades.
• This innovation is beneficial for thermoregulation in densely packed megacities and during winter.