Installing Evaporative Cooling Pads in Chicken Houses

The high temperature in summer can easily lead to the heat stress reaction of chickens, resulting in a significant decrease in feed intake of chickens, a decrease in egg production rate, and even an increase in death. Therefore, longitudinal ventilation and cooling pads should be adopted to cool the closed hen house in summer to reduce the body temperature of chickens and reduce heat stress. The following mainly introduces the use of cooling pads, hoping to help farmers and related practitioners safe summer.

1. The operating principle of the cooling pad

Cooling pad, which absorbs heat through water evaporation to achieve cooling. When the outdoor hot and dry air is pumped through the paper by the fan, the water on the water film will absorb the heat of the air and evaporate into vapor, so that the cool and humid air after treatment will enter the room, so that the air entering the house will quickly reduce 10 to 15 ° C.

2, cooling pad configuration and installation

1, suitable cooling pad area

In order to play the cooling effect of the cooling pad, it is necessary to match the appropriate cooling pad area according to the ventilation volume. The formula for calculating the suitable area of the cooling pad is: total ventilation/wind speed through the curtain.

For example, a laying house with a stock of 16500 chickens, an average weight of 1.8kg/ chicken, and a 15cm thick cooling pad is to be installed is calculated: The oxygen demand of chickens per hour is 7~9m3/h/kg, and the wind speed through the curtain is 1.5 ~2.0m/s, then the total ventilation is 16500 × 1.8kg / ×8m3/h/kg=66m3/s, and the suitable installation area of the evaporating cooling pad is 66m3/s÷ 1.7m /s=39m2.

2, evaporative cooling pad installation precautions

(1) Ensure the tightness of the chicken house

The coop with the cooling pad should be well sealed. If the coop is poorly sealed, negative pressure can not be formed, the air through the cooling pad will be less or even not through the cooling pad, and the hot air outside the coop will flow in through the gap of the coop, thus failing to achieve the cooling effect of the cooling pad.

(2) Select the appropriate installation position

According to the requirements of the chicken house structure, select the appropriate installation position of the evaporative cooling pad, the length of the chicken house is less than 100 meters, it is generally recommended to install in the front gable of the chicken house, the chicken house inlet area can be installed when the side cooling pad, and the front cooling pad should be more than 2 to 3 meters away from the chickens, to avoid the cold wind blowing directly.

(3) Increase evaporative cooling pad supporting facilities

Evaporative cooling pad deflector

The cooling pad deflector is installed at the air outlet of the wet curtain inside the chicken house, and the cold air entering the chicken house is pushed to the middle and back end of the chicken house after the deflector deflector, so that the temperature difference between the front and back of the house is reduced from 7~8℃ to 4~5℃, and the temperature uniformity before and after the chicken house is improved.