Why are HVLS fans suitable for dairy farms?

Although large HVLS fans are commonly used in industrial sites, in fact, large industrial HVLS fans are also particularly suitable for dairy farms. Large HVLS fans could help solve the problem of ventilation and cooling of dairy farms, thereby increasing the milk production of dairy cows and reducing dairy cow diseases. Actually, the HVLS fan was originally developed for animal husbandry applications. In the last century, American farmers hoped to find a better way to help cows cool and reduce heat stress, as it is known to dairy farmers that if a cow feels comfortable, then it would eat more and produce more milk. By adopting the method of an electric motor equipped with large fan blades, the embryonic form of the HVLS fan appeared. And HVLS fans were gradually widely used in industrial sites.



SOME ADVANTAGES WILL BE REVEALED when HVLS fans are installed on dairy farms.

1.

Cows will feel very comfortable and involved in milk production.

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As HVLS (high-volume, low-speed) fan has 24ft/7.3m diameter fan blades, it can produce large air volume. While the HVLS fan rotates very slowly, only 54RPM per minute, the wind speed is slow, gentle, soft, and silent. All of these make cows feel comfortable and happy and then eat more, and cows will produce more high-quality milk.

2.

Improve the lifespan of cows.

If the environment is humid, cows can easily get sick. This would lead to a shortened lifespan for dairy cows. After the HVLS fan is installed, with the rotation of the HVLS fan, the fan can evaporate the water vapor in the air, making the dairy farm a little dry. Thereby reducing the growth of bacteria. A clean environment will reduce the number of illnesses in cows, thereby increasing the life span of cows.

3.

HVLS fans can help dairy farmers save on electricity bills.

One 7.3m/24ft diameter HVLS fan could cover square meters. Large industrial HVLS fans cover a large area, with only 1KWH of electricity per hour. At first, dairy farmers will choose to use high-speed fans. The sharp wind of the fans makes dairy cows feel not comfortable. At the same time, one set of small ceiling fans only covers 15 to 30 square meters. A normal-scale dairy farm would need at least 30 sets of small high-speed fans while using large HVLS(High-Volume, Low-Speed) ceiling fans; one 7.3m/24ft HVLS fan is enough. Please take this as an example; one set, a 7.3m HVLS fan, is 1.5KW, and one set a 0.75m small high-speed fan is 0.36KW. All fans work for operating times. Under this situation, the electric consumption of a 7.3m/24ft HVLS fan is only degrees. At the same time, 0.75m small high-speed fans reach up to degrees. A large HVLS fan could help save degrees. Saving electricity is saving money for dairy farmers. What's more, using a lifetime of HVLS fans could reach up to 10 years, while low-high-speed fans only have two years. From this side, we can see obviously that HVLS fans could help save more money. Combined with the second advantage, we know large HVLS fans can reduce the number of sick cows. If dairy cows don't need to see the animal husbandry doctor, the farmer can save money again.

4.

Help dairy farm employees get a comfortable working environment and improve their work efficiency.

Large HVLS fans work for dairy cows and work for employees. HVLS fans can make employees feel cool by evaporating sweat. Workers would feel the comfortable wind like the natural wind with a soft and gentle wind. Under these good working conditions, workers would work more happily and increase their milking speed.

5.

Improve the air quality of dairy farms.

As we all know, farms are very smelly because of animal feces. Dairy farms are no exception. When a large HVLS fan is installed, the peculiar smell can be squeezed out by the fan's wind. Thereby improving the environment of the dairy farm. Workers can work happily in a less smelly environment.

6.

Keep dairy farms warm in winter.

In addition to cooling dairy cows, large HVLS fans can also be used in the winter months. HVLS fans can be set to reverse during those cold times and run at low speeds. Then the hot air above can be mixed with the cold air below, thereby increasing the overall ambient temperature. If combining large HVLS fans with some other warm equipment, the whole dairy farm can be heated up more quickly.

With rapid technology, apart from traditional geared HVLS fans, we have developed PMSM (permanent magnet synchronous motor) HVLS fans. In addition to the above advantages, PMSM HVLS fans could provide free maintenance, super silence, and small installing space. By using high-volume, low-speed, ultra-quiet fans, cows, workers, and farmers will become better. Cows will produce more milk, workers will have a better working environment, and farmers will get more profits.

Source:

Gaxiaofan Press Department

Publication Date:

8/1/

Although large HVLS fans are commonly used in industrial sites, in fact, large industrial HVLS fans are also particularly suitable for dairy farms. Large HVLS fans could help solve the problem of ventilation and cooling of dairy farms, thereby increasing the milk production of dairy cows and reducing dairy cow diseases. Actually, the HVLS fan was originally developed for animal husbandry applications. In the last century, American farmers hoped to find a better way to help cows cool and reduce heat stress, as it is known to dairy farmers that if a cow feels comfortable, then it would eat more and produce more milk. By adopting the method of an electric motor equipped with large fan blades, the embryonic form of the HVLS fan appeared. And HVLS fans were gradually widely used in industrial sites.SOME ADVANTAGES WILL BE REVEALED when HVLS fans are installed on dairy farms.1.As HVLS (high-volume, low-speed) fan has 24ft/7.3m diameter fan blades, it can produce large air volume. While the HVLS fan rotates very slowly, only 54RPM per minute, the wind speed is slow, gentle, soft, and silent. All of these make cows feel comfortable and happy and then eat more, and cows will produce more high-quality milk.2.If the environment is humid, cows can easily get sick. This would lead to a shortened lifespan for dairy cows. After the HVLS fan is installed, with the rotation of the HVLS fan, the fan can evaporate the water vapor in the air, making the dairy farm a little dry. Thereby reducing the growth of bacteria. A clean environment will reduce the number of illnesses in cows, thereby increasing the life span of cows.3.One 7.3m/24ft diameter HVLS fan could cover square meters. Large industrial HVLS fans cover a large area, with only 1KWH of electricity per hour. At first, dairy farmers will choose to use high-speed fans. The sharp wind of the fans makes dairy cows feel not comfortable. At the same time, one set of small ceiling fans only covers 15 to 30 square meters. A normal-scale dairy farm would need at least 30 sets of small high-speed fans while using large HVLS(High-Volume, Low-Speed) ceiling fans; one 7.3m/24ft HVLS fan is enough. Please take this as an example; one set, a 7.3m HVLS fan, is 1.5KW, and one set a 0.75m small high-speed fan is 0.36KW. All fans work for operating times. Under this situation, the electric consumption of a 7.3m/24ft HVLS fan is only degrees. At the same time, 0.75m small high-speed fans reach up to degrees. A large HVLS fan could help save degrees. Saving electricity is saving money for dairy farmers. What's more, using a lifetime of HVLS fans could reach up to 10 years, while low-high-speed fans only have two years. From this side, we can see obviously that HVLS fans could help save more money. Combined with the second advantage, we know large HVLS fans can reduce the number of sick cows. If dairy cows don't need to see the animal husbandry doctor, the farmer can save money again.4.Large HVLS fans work for dairy cows and work for employees. HVLS fans can make employees feel cool by evaporating sweat. Workers would feel the comfortable wind like the natural wind with a soft and gentle wind. Under these good working conditions, workers would work more happily and increase their milking speed.5.As we all know, farms are very smelly because of animal feces. Dairy farms are no exception. When a large HVLS fan is installed, the peculiar smell can be squeezed out by the fan's wind. Thereby improving the environment of the dairy farm. Workers can work happily in a less smelly environment.6.In addition to cooling dairy cows, large HVLS fans can also be used in the winter months. HVLS fans can be set to reverse during those cold times and run at low speeds. Then the hot air above can be mixed with the cold air below, thereby increasing the overall ambient temperature. If combining large HVLS fans with some other warm equipment, the whole dairy farm can be heated up more quickly.With rapid technology, apart from traditional geared HVLS fans, we have developed PMSM (permanent magnet synchronous motor) HVLS fans. In addition to the above advantages, PMSM HVLS fans could provide free maintenance, super silence, and small installing space. By using high-volume, low-speed, ultra-quiet fans, cows, workers, and farmers will become better. Cows will produce more milk, workers will have a better working environment, and farmers will get more profits.Gaxiaofan Press Department8/1/

Over the last 10 to 15 years, we have seen the introduction of large-diameter ceiling fans into the design of freestall dairy facilities. High-volume, low-speed (HVLS) fans were originally designed and used in large commercial warehouses and production plants, and the first livestock application was for riding arenas in the large equine markets of the U.S. From there, HVLS fans were experimented with in dairy barns and proved to be quite effective at improving cow comfort.

Rick McBay

Natural Ventilation Specialist / Canarm AgSystems

If you want to learn more, please visit our website Windmax Power.

Rick McBay has provided producers with equipment and ventilation solutions for the past 40 years.

Rick McBay

The purpose of HVLS fans is twofold depending on if it is operating in forward or reverse. When the fan is set to run in the forward direction, it creates a column of air the same size as the fan diameter directly downward, which then radiates a wave of air approximately 4 feet high out from the fan in a 360-degree pattern. Due to the large size of the fan blades &#; up to 24 feet in diameter &#; the air moves at high speeds, creating a velocity cooling effect for the animals as it passes over them.

Operational benefits

For hot-weather operation, HVLS fans are operated on a variable-speed basis with an automatic temperature controller. This will start the fans at a set interior temperature and speed them up or slow them down based on changes in the interior temperature. This is especially helpful during the spring and fall, when outside temperatures can vary dramatically over a 24-hour period.

During cold-weather operation, when operating in reverse, HVLS fans can be used to push air upward, which will destratify any heat that is layered along the ceiling and recirculate it gently throughout the building. Typically, this is accomplished by utilizing a variable-speed control and having the fan running at a constant speed of approximately 20%. An added benefit when operating in reverse in a natural ventilation system is: The air moves over the inside of the sidewall curtain fabric and reduces the potential for condensation buildup in cold weather.

Since HVLS fans cover large areas and use a three-phase motor, the operating costs will be lower in comparison to a larger number of small high-speed fans. In fact, in some areas of North America, the local power authorities are offering substantial rebates to encourage the purchase of HVLS fans.

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In some instances, operators have found that since birds can see the slow-moving blades, they are less likely to enter the barn when these fans are operating. However, this may not always be the case. If there are perch points created where the fans are mounted, birds may still tend to roost and nest. 

HVLS fans can play an important role in an inclusive fly control program that should be in place in your operation. The high-speed air flow they create within the building can also help reduce the number of flies during hot weather. 

Design considerations

If you are operating a freestall dairy with large sidewall curtain openings, the fans should be mounted at a height that is above the curtain opening. Due to the length of the blade, there can be flexing in windy conditions that can cause the blade to break. HVLS fans are typically available in sizes from 8 feet to 24 feet in diameter, and the smaller units will prove to be more resistant to wind damage. It is also advisable to use a controller that has the capacity for wind sensor input so the fans can be automatically shut down in windy conditions. 

In hot weather, cows will tend to stand directly under the fan where the air is coolest, so when placing the fans within the building, you should avoid having them over areas where cattle can congregate and create blockages such as scrape alleys. 

When creating the fan layout, avoid having a fan mounted directly under a light fixture, as the rotation of the fan blade can cause a strobe light effect which will create an uncomfortable visual element for your cattle.

As with any ventilation system within your dairy, you should consult with a ventilation specialist who can advise you on the size and layout of HVLS fans that will work the best for you and your cows.

Contact us to discuss your requirements of Dairy farms Large Ceiling Fans Manufacturer. Our experienced sales team can help you identify the options that best suit your needs.