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Urban heat island
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The urban heat island effect is a meteorological and climatological phenomenon in which urban areas experience significantly warmer temperatures than surrounding rural areas. The temperature differenc
Example of dense urban living without green spaces which leads to a pronounced urban heat island effect (Milan, Italy)
Example of dense urban living without green spaces which leads to a pronounced urban heat island effect (Milan, Italy)
Example of an inner city green space, which can reduce the urban heat island effect (Central Park, New York)
Example of an inner city green space, which can reduce the urban heat island effect (Central Park, New York)
High-rise buildings of Manhattan, an example of dense urban living
High-rise buildings of Manhattan, an example of dense urban living
Example of urbanization: Dubai
Example of urbanization: Dubai
Passive daytime radiative cooling
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Passive daytime radiative cooling —also called passive radiative cooling, daytime passive radiative cooling, radiative sky cooling, photonic radiative cooling, and terrestrial radiative cooling—is the
Urban heat island
…Heat can be reduced by tree cover and green space, which act as sources of shade and promote evaporative cooling. Other options include green roofs, passive daytime radiative cooling applications, ventilation corridors, the use of lighter-colored surfaces, and less absorptive building materials. These reflect more sunlight and absorb…
PDRC can lower temperatures with zero energy consumption or pollution by radiating heat into outer space. Widespread application has been proposed as
PDRC can lower temperatures with zero energy consumption or pollution by radiating heat into outer space. Widespread application has been proposed as a solution to global warming.
PDRC maximizes outgoing infrared radiation (shown in orange) and minimizes the absorption of solar radiation (shown in yellow).
PDRC maximizes outgoing infrared radiation (shown in orange) and minimizes the absorption of solar radiation (shown in yellow).
A scalable colored PDRC coating using bismuth oxide (pictured) was developed by Zhai et al.
A scalable colored PDRC coating using bismuth oxide (pictured) was developed by Zhai et al.
A photonic radiator film based on the longicorn beetle Neocerambyx gigas exhibited 95% solar irradiance and 96% emissivity.
A photonic radiator film based on the longicorn beetle Neocerambyx gigas exhibited 95% solar irradiance and 96% emissivity.