Daytime Radiative Cooling: A Perspective toward Urban Heat Island Mitigation.

Area of Science:

• Materials Science
• Sustainable Energy
• Building Technology

Background:

• Traditional HVAC systems contribute significantly to global energy use and emissions.
• Daytime radiative cooling (DRC) is an emerging passive technology with high cooling potential.
• DRC can mitigate urban heat and reduce energy demand in buildings.

Purpose of the Study:

• To critically review material development strategies for DRC.
• To identify challenges hindering the wide-scale application of DRC.
• To outline future research directions for practical DRC implementation.

Main Methods:

• Review of current research on DRC materials and applications.
• Analysis of challenges in laboratory/field testing and simulations.
• Discussion of advancements in nanofabrication for DRC.

Main Results:

• Significant progress has been made in developing materials for DRC.
• Standardization of experimental protocols is needed for reliable performance evaluation.
• Nanofabrication techniques show promise for enhancing DRC efficiency.

Conclusions:

• DRC is a key technology for sustainable cooling in the built environment.
• Overcoming current challenges requires interdisciplinary efforts in materials science and engineering.
• Standardized testing and advanced fabrication methods will accelerate DRC adoption and economic viability.