Evaporative Cooling Pad
Estimate poultry house evaporative cooling pad performance, incoming air temperature, incoming relative humidity, pad water usage, and recommended pad area from tunnel fan capacity and outside conditions.
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Results
ExcellentWarnings
Methods & Assumptions
Principles of Evaporative Cooling
Evaporative cooling pads reduce air temperature by forcing hot, dry air through wet cellulose pads, converting sensible heat to latent heat. The maximum possible cooling drop is determined by the outside wet bulb temperature.
On high humidity days, evaporative cooling is much less effective because the air is already close to saturation and cannot evaporate additional water. Furthermore, the design velocity across the pad face is critical: if air speed exceeds 350-400 fpm, water droplets can carry over into the house, wetting the birds' feathers.
Frequently Asked Questions (FAQ)
Why does high humidity reduce cooling?
Evaporative cooling works by evaporating water into the air. Humid air is already closer to saturation, so it cannot accept as much additional moisture.
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