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2019-03-18

Livestock and poultry housing experts offer advice on how to effectively use wet‑pad cooling systems during the summer.

Principle of Evaporative Cooling via Wet Curtains Evaporative cooling using wet curtains operates on the principle that water evaporation absorbs heat, thereby reducing the temperature of air entering the poultry house and lowering the internal temperature. Under hot weather conditions, under normal circumstances, passing hot air through a wet curtain can reduce its temperature by 5.5–6.5°C; when combined with the wind‑cooling effect, the perceived temperature for the birds can drop by as much as 8°C. The cooling performance depends on factors such as the wet curtain’s surface area, thickness, permeability, and sealing integrity. 1. Wet Curtain Surface Area Wet curtains are installed at the inlet openings on the gable and side walls of the poultry house. During installation, insulated extension rooms should be mounted externally to increase the effective air‑inlet area and prevent cold drafts from blowing directly onto the birds. The required wet curtain surface area is calculated as follows: Wet Curtain Surface Area = Total Ventilation Volume in the House / Air Velocity Through the Curtain / 3,600 seconds, based on the current flock size.

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Keywords: pig farming equipment, tiered layer cages, automated commercial broiler cages, broiler cages, compound feed processing units, chicken cages, in‑cage breeding cages, pelletizing machines, stacked layer cages

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