Abstract
The technique of direct evaporative cooling (DEC) has been applied as an alternative to air conditioning by compression for indoor environments. The DEC process consists of reducing air temperature by evaporating water. The aim of this study was to identify the behavior of temperature, air humidity and water consumption in a test cell using a DEC electromechanical equipment and to compare it with variations in a control test cell, without any active cooling system. Water consumption was measured according to certain temperature and humidity ranges of outside air. The results showed that the warmest and driest period of the external air coincides with the moment when the evaporative cooler reaches the peak of its performance, registering 6.69 ºC of difference between the internal and external temperatures. However, in periods of warm and humid weather, the difference was only 1.74 ºC. The maximum water consumption recorded during the experiment was 3.35 l / h, considering the temperature of the outside air in the range of 30ºC and the relative humidity at 60%. The experimental study provides crucial information for the best adaptation of DEC to buildings.
Keywords:
Direct evaporative cooling; Psychrometry; Environmental thermal conditioning
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