Dairy cows are very sensitive to heat stress, which can cost the dairy farmer over EUR 250,00-EUR 300,00 per cow per year.
Higher producing cows show even more signs of heat stress. There is increasing evidence that relatively low temperatures can lead to depressed feed intakes, lower milk yields, reduced fertility and increased risk of mastitis.
Heat Stress is linked to ambient temperature and to relative humidity.
The temperature-humidity index, or THI, is the common indicator for heat stress.
While the heat stress threshold was previously set at a THI value of 72, new studies show that a THI of 68 already effects the milk production, health and reproduction of high yielding cows.
Simple tips to reduce the negative impacts of heat stress on dairy cattle:
1. Provide adequate shade.
2. Provide cooling with fans.
3. Supply enough fresh and clean water.
4. Modify feed rations to increase energy supply and decrease heat load on the cow.
5. Add sprinklers/soakers and/or misters/foggers when possible.
Latest motor technology now applied in ABBI-FAN axial fans. The ABBI-FAN 140-XXP-1 fan is Abbi-Aerotech’s latest development in fans for livestock buildings. This fan is by far the most energy efficient in the market for larger axial fans. A sophisticated suspension system automatically ensures that a running fan is correctly positioned. The ABBI-FAN 140-XXP-1 is equipped with a permanent magnetic motor and accompanying electronic control.Download product leaflet
State of the art motor technology now available and affordable!
The CLASSIC FAN is a reliable product for an affordable price. The motor, blades and casing (galvanised steel sheet) are tailored to the specific dairy housing conditions. High airflow coupled with efficient energy consumption make this an attractive purchase, certainly when taking the low purchase price into consideration. Because of the recognizable appearance, this fan is proud to carry the name CLASSIC.
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Also in the milking parlour, additional air movement ensures cooling on hot days.
Not only the milker, but also the milking cows take advantage of the additional air movement. The cows stay calm, due to the presence of fewer flies.
To enable this, Abbi-Aerotech delivers a stepless controllable fan, the Abbifan 5050 or 5060. They have an air capacity of 5200-8500 m³/h. These fans blow horizontally over the cows and are suitable for an area of ca.30-50 m. Optionally they are equipped with guards on both sides and meet CE-Standards. The support can be made with rods or chain. With a simple control, e.g. ESA 2305, you can manually choose the preferred fan speed.Download product leaflet
Abbifan 140-XXP now equipped with EC DC motor
for extremely low power consumption and an affordable price!
The ABBI-FAN 140-X fan is the best option for the necessary cooling:
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.
Each situation is different and asks for a different solution. We have many years of experience in different climate conditions, in different places around the world. And these practical experiences are for free for any serious farmer who wants the best for his livestock and himself.