Within the boundaries of Climate Change, existing hot and humid climates will likely become more extreme calling for research into solutions that allow for the thermal liveability of such places. To this extent, there is literature advocating for exploring evaporative cooling in hot and humid climates, having recorded that when fine mist is deposited on skin, thermal comfort can be achieved. However, there is only a handful of studies involved with misting prototypes efficacy in such contexts. An experimental study was thus conducted to explore simple mist cooling technologies impact on outdoor comfort. A full-scale misting prototype was built in the city of Antofagasta, located in the desert of Chile, and experiencing high humidity and massive solar radiation. The generated environmental conditions were measured, and thermal comfort questionnaires used to supplement quantitative data interpretation with information on the levels of comfort achieved.
The experiment demonstrated the potential of mist cooling in this environment, which led to a significant reduction in air temperature, mean radiant temperature and thus on the universal thermal climate index, without significant increases in ambient humidity. Results showed over a 15°C cooling effect in all three metrics at peak times, and occupants consistently reported a cooling effect after spending time within the mist.