Sprinkler systems wet the cows with a large droplet and then use fans to blow across the cow's bodies to evaporate the water and cool the cows. In most cases a pipeline is installed next to the feeding area and mounted with low pressure 180° nozzles spreading the water over the cows’ back. A spray pattern with a radius of max. 2.40m. is wanted so the freestalls don't get wet.
Nozzle size determines rate. Only the correct pipe diameters, pressure regulators, thermostats and timers make the system complete and successful. Abbi-Aerotech can help you making the correct installations.
High pressure fogging systems for evaporative cooling are used to cool the air above the cow without wetting the cow.
A fog-ring is mounted on the fans consisting of 6, 8 or 10 nozzles. A high pressure water pump supplies the water to the nozzles at 70 Bar, to the nozzles, where a fine mist vaporizes, absorbing the heat and transferring it away from the cow. Depending on the humidity level in the barn, temperature drops of 3-5°C can be reached. Important is the control of humidity levels and the settings made on the controls.
Abbi-Aerotech can help you making the correct installations.
The fogging system works with a high pressure pump at 70 Bar, and by means of special nozzles the water is nebulized into drops of just 10 microns. The nebulous water evaporates instantly, lowering the ambient temperature. The soaking system works with a low pressure system of 1,3 Bar. The soaking nozzles are placed above the feeding table with a pipe or the nozzles are placed above the holding area.
Water is being pumped across the pad. The airflow evaporates the water and the air cools down. Temperature can be lowered by 8-15°C, depending on local conditions.
The highly efficient “Aerocool” panels are easy to install and control. Pads are very effective in dry climatic conditions. In humid regions, not all systems are equally suitable. In that case, pad cooling is a better solution.Download product leaflet
Natural ventilation is a good way to ventilate cattle barns. However, on hot days with temperatures above 20°C, cows start having trouble to lose heat and additional air movement must be provided! This improves the heat release of the animals and thus reduces the risk of heat stress. It is important to start ventilating early; low air velocities already suffice to shift the lead-up to heat stress and while the temperature rises, the air velocity is increased proportionally.
Tests have shown that the best results are achieved when the fans are placed both above the cows on the feeding line and above the head-to-head freestalls. Ideally, fans are placed at a height of 2.7 m, directed downwards at an angle of aprox. 15-30°. The air velocity and the blow length of the fan determine the intermediate distance.
Fans can also be placed in the outside wall to draw outside air into the barn through cooling panels. This method, the so-called tunnel ventilation system, can realize temperature reductions of as much as 8 to 12°C!
A good cooling system produces an air velocity at animal height of at least 2.5-3.0 m/sec throughout the barn. While the temperature of the air does not drop, the wind chill at this air velocity means that the animals experience a temperature that is 2 to 4°C lower.
Extra cooling can be provided by fitting a fogging system to the fans. A separate fogging system only works in combination with fans, whereby measures should be taken to prevent extreme humidity. A ring of high-pressure (70Bar) spraying nozzles can be mounted to the fan, with a time clock or special regulator ensuring regular water atomisation. The very fine droplets evaporate quickly, lowering the air temperature by some 3 to 4°C.
The speed of the fan can be regulated by means of a frequency controller, guaranteeing low energy consumption at low speeds.
Abbi-Aerotech provides various options for automatic ventilation control by means of frequency controllers in combination with a DCC-1 or DCC-1SH temperature controller.
The DF-Control, (Dairy Frequency control) is a state of the art frequency inverter for 3-phase motors with extra energy efficiency.
Year after year, heat stress leads to a decrease in milk production. That is why Abbi-Aerotech has made a ventilation system that helps to solve this problem. We can provide you with the best climate solution for your barn. Contact one of our experts and we will be happy to help!