An evaporative water-cooled air conditioner is a type of air conditioning system that uses water as a cooling medium. The system works by drawing warm air through a wet cooling pad or media, which causes the water in the pad to evaporate, cooling the air as it passes through. The cooled air is then circulated back into the living space. This type of air conditioner is often used in dry, arid climates where the humidity is low and the air is hot. It is typically more energy-efficient than traditional air conditioning systems, as it uses less electricity to cool the air. However, it may not be as effective in humid climates, as the air may already be saturated with moisture and unable to absorb more water.