Subambient Cooling Effect and Cooling Energy Efficiency of a Superamphiphobic Self-Cleaning Radiative Cooling Coating Applied to Mobile Communication Base Stations in Different Climate Regions

A scalable superamphiphobic self-cleaning daytime radiative cooling coating (RC coating) was successfully applied to distributed and conventional mobile communication base stations in different climate regions. The superamphiphobic RC coating achieved roof surface temperatures of the battery and equipment cabinets of distributed mobile communication base (d-base) stations which were below the ambient air temperature and far lower than those of d-base stations painted with grey and cool white coatings, resulting in pronounced cooling energy conservation of the air conditioners installed inside the battery and equipment cabinets. The most notable cooling energy efficiency of the equipment cabinet was up to 84.6% in a typical arid subtropical region. The superamphiphobic RC coating significantly reduced the roof surface temperatures of the conventional mobile communication base (c-base) stations, which were below the ambient air temperature regardless of the climate and weather, yielding remarkable cooling energy savings of the air conditioners inside the c-base stations. Although the superamphiphobic RC coating significantly reduced the internal temperature of slightly heat-producing battery cabinets, the power consumption of the communication equipment itself was unchanged