Title: Evaporative Cooling Using a Pneumatic Misting System
Abstract: ABSTRACT Acycling pneumatic misting system, employing water atomization by compressed air, was tested in an experimental poultry building. System operation was controlled by an interior humidistat. The system was tested with and without birds (turkey hens) present. Dry and wet bulb temperatures inside and outside the building were measured for different combinations of system target relative humidity and ventilation rate. Evaporative cooling efficiency computed from temperature measurements alone, i.e. without correcting for sensible heat and moisture loads from birds and other sources, varied from 24.7 to 69%. The system was capable of maintaining target relative humidities of 70 to 90% within 8% for ventilation rates of 8.1 kg/s or less, and provided 5.5C or more reduction in dry bulb temperature for outside dry bulb temperatures of 34.4C or greater. Simultaneous solution of sensible heat and moisture balances for the interior air gave predictions of system performance given average ventilation rates, target relative humidities, maximum misting rate, outside conditions and pertinent thermal parameters.
Publication Year: 1989
Publication Date: 1989-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 16
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