How does the suitability of evaporative air coolers vary across climates?

The suitability of evaporative air coolers varies significantly across climates, primarily influenced by air humidity and temperature. In dry, hot climates, due to the low water vapor content in the air, evaporative air coolers are more efficient at absorbing moisture and promoting evaporation, thereby cooling the air.

However, in high-humidity environments, the air is nearing saturation, the evaporation rate slows, and the cooling effect is significantly reduced. Therefore, evaporative air coolers are most effective in dry climates and less effective in high-humidity areas.

Furthermore, the suitability of evaporative air coolers is also influenced by climate zoning. For example, based on the calculated outdoor wet-bulb temperature during summer, the suitability of evaporative cooling technology can be categorized into different regions, with regions with lower wet-bulb temperatures being more suitable for evaporative coolers.

For example, regions with wet-bulb temperatures below 20°C are considered dry and cool, while regions with wet-bulb temperatures between 20°C and 23°C are considered dry and hot.

The differences in the suitability of evaporative air coolers across climates are primarily reflected in their cooling efficiency and applicable range. While evaporative air coolers provide effective cooling in dry climates, their effectiveness is limited in high humidity or humid climates.