Direct evaporative cooling is a type of evaporative cooling process that cools the air by passing it through a wetted surface, such as a filter or pad, to absorb heat from the air and evaporate water into the air stream. The air is cooled by the direct exchange of heat between the air and water.
In a direct evaporative cooling system, a fan draws warm, dry air through a wetted filter or pad, where the water evaporates and cools the air. The cooled air is then circulated into the space, reducing the temperature and increasing humidity. As the air is cooled by evaporation, the relative humidity in the air increases, making it feel more comfortable.
Direct evaporative cooling systems are typically used in dry and hot climates, where the air is dry and there is low humidity. These systems are also relatively simple and cost-effective to install and operate, as they do not require complex equipment or refrigerants.
However, direct evaporative cooling may not be suitable for humid climates, as the additional moisture added to the air can lead to uncomfortable and humid indoor conditions.
