THEORETICAL PERFORMANCE ANALYSIS OF OCTAGON CONFIGURATION AS COOLING MEDIA IN DIRECT EVAPORATIVE COOLING

The present paper illustrates the performance enhancement technique of direct evaporative cooling based on previous research followed by development of octagonal cooling media for better saturation effectiveness. The heat exchange by cooling media for different configurations and material is studied. The influence of inlet air temperature, humidity, mass flow rate of air and supply air temperature has been discussed by using octagon-cooling media. It is evident that the octagon cooling media is more efficient than hexagonal cooling media for hot and dry climate in central India. Additionally, Octagon cooling media provides higher mass flow rate of supply air than hexagonal cooling media for same input of air. The comparison between hexagonal and octagonal cooling media shows that saturation efficiency is 93.6% for octagonal cooling media made of Aspen fibre at 40.5 °C DBT, whereas cooling capacity is 47769.81 Watt that is more than for the former. When the thickness of hexagonal and octagonal cooling media kept same then saturation efficiency decreases with increase in cooling capacity.