How many cooling pads are suitable to install in pig farms?

The installation of drainage ditch cooling system in pig farms is mainly used for cooling the pigsty in summer. The installation of drainage ditch cooling system is divided into two types: external and embedded. Generally speaking, the reserved hole should be embedded with a cooling pad, and if the size is uncertain and there is no reserved hole size, external hanging should be used.
Many pig farmers who are new to evaporative cooling pads are unaware of the cooling principle of evaporative cooling pads and the number of cooling pads installed in the pigsty. Below is an introduction to the working principle and calculation method:
The cooling principle of a water curtain:
Cooling water curtain is a special paper-based honeycomb material, and its working principle is the natural physical phenomenon of “water evaporation absorbing heat”. Under the action of gravity, water flows from top to bottom, forming a water film on the corrugated fiber surface of the water curtain. When the flowing air passes through the water curtain, the water in the water film will evaporate and absorb the heat in the air, taking away a large amount of latent heat, causing the temperature of the air passing through the water curtain to decrease, thereby achieving the purpose of cooling.

When installing a water curtain in a pigsty, it should match the ventilation capacity of the fan installation. The small area of the water curtain increases the static pressure difference in the pigsty, leading to an increase in the wind resistance coefficient and a decrease in ventilation, thereby affecting the cooling effect. Excessive water curtain area can cause unnecessary waste. Normally, the wind speed of a fan is around 10-12m/s, and it can also be simply calculated that the water curtain area should be 3-4 times that of the fan.
The working principle of the pigsty water curtain is simple, which is a process of using a water pump to draw water from the pool onto the wet curtain and then recycling it back into the reservoir. Air enters the pigsty through the pores in the middle of the water curtain, using water evaporation to carry away heat and achieve cooling.

Calculation method for water curtain area:
Taking a water curtain with a thickness of 15cm and a height of 1.5m as an example:
The total exhaust volume of the pigsty=number of fans × Rated exhaust volume of each fan
The area of all water curtains=total exhaust air volume of the pigsty ÷ total wind speed passing through the water curtains (2m/S)
Total length of water curtain=area of water curtain ÷ height of water curtain
The length of each side wall water curtain is equal to the total width of the water curtain divided by 2
In fact, many pig farmers have a misconception that the more water curtains are installed, the cooler the pigsty will be. Installing too many water curtains in a pigsty can cause unnecessary waste, with a water curtain area generally 3-4 times that of a fan.