Wind pressure is important for industrial large fans

Views : 135
Update time : 2023-06-16 13:21:11

then wind pressure is an important indicator to measure the "powerful" air volume of large fans. If air volume can be compared to the striking power of a weapon, then wind pressure is the sharpness of that weapon. Many clients who choose industrial fans consider air volume as the primary factor to consider. Wind pressure is one of the important performance indicators of large fans, and it is closely related to the shape, area, height, and speed of the fan blades. The impact of the first three is more complex, while the relationship with speed is simple and direct: the faster the speed, the larger the fan's airflow.

The wind pressure of industrial large fans changes with changes in airflow pressure. Wind pressure is caused by the obstruction of the building, which blocks the surrounding air, causing a drop in dynamic pressure and an increase in static pressure; this produces local eddies on the front and back sides. Compared with the disturbed airflow at a distance, the increase and decrease of static pressure are collectively called wind pressure. The wind pressure of a large fan is the pressure difference between the outlet and inlet of the fan. Its unit is generally mm (cm) water column, which is similar to measuring air pressure with a millimeter mercury column, but because the pressure difference is small, the water column is usually used as the unit: mmH20 / mmAq / Pa / mmHg.

To achieve normal ventilation, it is necessary to overcome the resistance within the ventilation path of the fan. The fan must generate pressure to overcome the resistance of air delivery. The change in measured pressure is called static pressure, which is the differential pressure between the maximum static pressure and atmospheric pressure. It is the pressure of gas acting parallel to the surface of an object. Static pressure is measured by a hole perpendicular to its surface. The wind pressure of an industrial fan directly affects the air delivery distance of the fan. The air volume and wind pressure described by large fans are both the maximum values under ideal conditions, that is, the air volume (maximum air volume) between the inlet and outlet of the industrial fan without pressure difference and the pressure difference (maximum static pressure) between the enclosed chamber where the fan blows air and the outside world when the air volume is zero. They are not two isolated performance indicators, but they restrict each other. The relationship between them is the typical relationship between flow velocity and pressure in fluid mechanics - as the pressure difference (specifically, the air resistance of the radiator fins) increases, the air volume decreases, and the degree to which they restrict each other depends on the design of blade shape and overall structure.

Industrial fan manufacturers consider both air volume and wind pressure in fan design. The fan blades of industrial large fans are designed with a streamlined variable cross-section design. When the fan is in operation, the blade can automatically rise by 3-8 degrees. When the fan stops, the blade can return to its original state. The fan has a diameter of 7.3 meters and rotates at 60 revolutions per minute. The design of blade shape, area, height, and fan speed can enable the industrial fan to achieve maximum air volume when in operation, reduce the central "hollow" phenomenon, and fully utilize the advantages of large air volume and wide coverage of large fans.

Related News
How many blades are good for HVLS industrial fans? How many blades are good for HVLS industrial fans?
Jun .30.2023
The HVIST fan was invented by a joint venture between a US and a Chinese company in 1999. After almost 20 years of development, various industrial fans with different numbers of blades have emerged. Currently, domestically and internationally, industrial fans mainly come in three-blade, four-blade, five-blade, six-blade, and eight-blade configurations. In theory, the more blades a fan has, the greater the airflow. However, since industrial fans are generally larger in size, more blades also mean more weight and increased safety risks. Therefore, it is necessary to strike a good balance between airflow and quality. Currently, industrial fans with five or six blades are most popular on the market. These two types are also the main products promoted abroad and have been market-certified for over a decade. As long as manufacturers strictly require high quality and safety for the blades, they can meet market demand.
Large fans in the indoor basketball hall improve ventilation and cooling Large fans in the indoor basketball hall improve ventilation and cooling
Jun .27.2023
With the promotion of nationwide fitness, various communities have built indoor basketball courts of different sizes. However, the large span, high height, and relatively sealed building structure of basketball courts pose great challenges to ventilation and cooling. In recent years, many venue constructors have found that large fans (big ceiling fans) can perfectly solve the ventilation and cooling problems, which are tricky for indoor basketball courts.
Principles to be followed in designing industrial large fan blades Principles to be followed in designing industrial large fan blades
Jun .27.2023
Industrial large fans have been imported into China from abroad, and batches of industrial fan manufacturers have been continuously researching, developing, and producing a full range of large industrial fan series products suitable for various environmental improvements in China. High-quality large fans are often built on good materials and unique advanced designs. The fan blades of industrial large fans are made of 5052 aviation aluminum, and unique blade designs can maximize the advantages of large fans and meet the needs of different users. When designing fan blades, industrial fan manufacturers need to follow certain principles.