Persistent sub-ambient cooling of vertical surfaces via a unique selective radiative–evaporative cooler

Key Points

• The aim is to explore the effectiveness of a unique cooling system that can lower surface temperatures below ambient levels using passive methods.
• Examined a selective radiative–evaporative cooler under direct sunlight
• Measured surface temperatures during daytime
• Assessed the cooling performance in real-world conditions
• Achieved significant reductions in surface temperatures under direct sunlight
• Confirmed effectiveness of the passive cooling approach
• Demonstrated potential for energy conservation in building applications