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The high effectiveness is obtained with the evaporative pad of 90 mm thickness. The air velocity determines the pad effectiveness, lower velocities...

The high effectiveness is obtained with the evaporative pad of 90 mm thickness. The air velocity determines the pad effectiveness, lower velocities gives higher effectiveness, and vice versa. The relative humidity drastically influences on the water evaporation rate, and no influence on effectiveness. The input dry-bulb air temperature grows slightly increases the effectiveness and almost linearly the water consumption. The developed model can be used as the tool for optimisation of refrigeration systems, where this direct evaporative pad is used as pre-cooler for air-cooled condensers and other applications.

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