How to reasonably plan the number and location of fans installed in dairy farms
Heat stress occurs when cows generate and absorb more heat than they can easily get rid of by respiration, sweating and air blowing by them (wind or fans).Heat stress situations cannot be avoided, but their impact can be minimized.In addition to adding more water to the cow, adjusting the daily diet to maintain feed intake, and providing shade, it is especially important to actively cool the cow.When the environment exceeds 26℃, it is recommended to use a smart sprinkler to spray cows with water and a fan to cool them. It also increases the flow of air, ensuring that air can flow freely through all corners of the cowshed.
1.Make sure you choose the right fan
It is self-evident that creating an ideal living environment for cows is important to the pasture, so all kinds of brand fans come on stage, each show a unique character.The fan supports natural ventilation, and the fresh air from the fan reduces the cows' perception of temperature and prevents them from suffering from heat stress, A minimum air speed of 2 meters per second is essential to achieve this effect, and EC fans are widely used,They can provide directed air flow at fairly high speeds and are therefore often placed behind feeding pens or above corrals to induce cows to feed or lie down, both of which are important for ideal milk production.
The use of fans can ensure a stable climate in the house throughout the year, prevent disease, reduce veterinary costs and increase milk production, thus bringing a good impact on the operation.Circulation fans for cows are suitable for use in large areas,high supply projection distance and air liquidity are important. In addition, the location of the fan in the dairy farm is also very important to avoid the production of wet spots.Dairy farms should pay attention to the following factors when choosing the type of fan: Durability and reliability of the fan; Suitable for intensive use; High projection range (long range projection, minimum speed 4.7 m/s); Resistance to extreme conditions; Adjustable fan ensures constant air flow at very low temperature.
2. Where is the best place to install the fan in the pasture?
Provide fresh air to each cow bed, which is where the cow spends the most time. Maintain at least 1.5 m free space on the intake side of the fan for optimal efficiency.
The installation is carried out using the existing row frame or the row frame specially installed for Terrui fans.
A fan is installed between the two compartments, covering an area sufficient to provide cooling to both compartments simultaneously.
The fans are extended to each other.
The suction side of the fan should be selected in an area that does not require ventilation.
Do not install the fan in a position where cows can reach it. For fans, the minimum installation height required is 2-2.5 meters from the ground to the bottom of the fan.
Do not hang the fan over the trough. Practice has found that this will dry out the food, but also lead to cows only eat concentrated feed, causing rumen acidification. Another disadvantage is that cows prefer to lie in manure bars in cool air currents, which increases the risk of udder infection.
For efficient use of the fan, make sure that there are as few obstacles to air flow as possible. Pay attention to unobtrusive obstacles, such as feeding robots.
3. How many fans does your ranch need to achieve the desired results?
Although much depends on the application of the fan, general assumptions can be made about the use of the fan in pasture. The ideal number of fans depends in part on how the installation is set up. The factors affecting the number of fans are as follows:
Wind speed and volume: When air is circulating, it is important to achieve and maintain a specific wind speed. When wind speeds exceed 2 meters per second, cows experience a cooling effect. An added advantage is that gadflies are also reduced when wind speeds exceed 2 meters; When wind speeds exceed 2.5 meters per second, other types of flies also stay away.
Scope of influence and efficiency: regardless of other factors and purely based on the fan itself, Terui fan adopts EC permanent magnet synchronous motor, which has higher wind speed and more energy saving than the general asynchronous motor fan. By installing another fan 6 meters away, the moving air is again drawn in and blown to another potential fan. This can not only improve the influence range of the fan, but also improve the efficiency of the fan.
4. Application Case of Terrui Fan
For further cooling on the basis of natural ventilation. Customers can control the switch of each fan through the mobile APP of Terrui Internet of Things software, so as to achieve real-time temperature control of the barn, and check the running state of the fan and fault warning in the background!
"The diameter of each Terui fan is 1 meter, 1.2 meters, 72 inches of positive and negative pressure, and each fan can accurately control the air flow rate above the cow's back without obvious air flu, which will not cause stress to the cow."
The customer believes that the fan investment can be recovered within two years. "The result is fewer flies, drier cattle sheds and, most importantly, better animal health. The use of this fan reduces veterinary bills for customers and increases cow fertility and milk production. Also, even old cows produce the same amount of milk all year round!"