What is one reason for the resurgence of rooftop spray ponds?

The resurgence of rooftop spray ponds can be attributed to their effectiveness in reducing solar load. These systems utilize evaporation to cool the air, which can significantly combat the intense heat absorbed by rooftops, particularly in urban environments with large amounts of heat-retaining surfaces. By creating a cooling effect, rooftop spray ponds help in maintaining more optimal temperatures for buildings, thereby improving overall energy efficiency and comfort.

This helps mitigate the heat island effect commonly seen in cities, where urban areas become considerably warmer than their rural surroundings. While improving cooling efficiency and providing additional insulation are relevant benefits, the specific mechanism of reducing solar load directly addresses the immediate need for thermal management, making it a primary reason for their renewed popularity.