.png){kind=logo}
The machines that provide a huge flow of gas or air to various parts of a building or other structures are known as industrial fans or industrial blowers. These fans operate by rotating a number of blades that are connected to a hub and shaft and are driven by a motor or turbine. These fans have a flow rate that ranges from 200 cubic feet (5.7 m3) approximately to 2,000,000 cubic feet (57,000 m3) per minute. Industrial fans are also known as blowers that operate where the resistance to the flow is mainly on the downstream side of the fan. Let’s know more about their types and uses.
The Need for Industrial Fans
You may think that the purpose of a fan is just to make the air cool. However, the truth is that it is much more useful than that. These fans are used for many other reasons, some of which are:
The fans have a cooling effect, especially during the time of summer.
These fans take in the hot air and then cool it through cross-ventilation.
If the workplace is very humid then good fan circulation will contribute towards maintaining the temperature of the room.
To move air from one part of the building to another
To expel polluted air from the inside to the outside of a building
To create air curtains
To clear debris from a space
4 Different Types of Industrial Fans
Here are some of the most common types of industrial fans 1. Axial Fans This type of fan has different blade shapes like Sickle, Paddle, Aerofoil, and Variable pitch. Axial fans are used for comparatively higher flow rates and lower pressures with a flow that is parallel to the axis of the fan. They also have a lower power input. Axial fans are normally used for simple extraction or cooling applications that have very low system resistance, for example moving air from one large space to another (that is, from the factory to outside), condenser cooling in refrigeration, and desk fans. 2. Tangential Fans These are barrel-shaped fans and have curved forward blades that are typically many times longer than any given diameter. Tangential fans scoop up the air and deliver it at relatively low pressure over a longer length, and are ideal for cabinet cooling or processing air coverage. The main advantage of such fans is that they provide very smooth laminar airflow over the whole frame width. They are suitable for air curtains, computer systems, air conditioning systems, convector fans, ovens, instrument racks, de-humidifiers, and ventilators. 3. Centrifugal Fans These fans have some typical impeller blade construction types like Radial, Backward Curved, Paddle, and Forward Curved. Their main characteristics are low flow rates and high pressures with a flow perpendicular to the blower axis. Air enters near the center of the fan and exits around the outside. Centrifugal fans with paddle impellers are used to pass debris through the system because this configuration prevents any type of clogging. Fans with backward curved blades produce less volume of air than axial fans, but generate much more pressure and do not consume as much power. They can also be manufactured as multistage units for producing even higher pressures. Centrifugal fans are used for process heating and cooling, electronic cooling, air handling units, and boiler combustion air. 4. Mixed Flow Fans This type is a mix of the two types of fans: Axial and Centrifugal by using the air movement techniques of both. Air enters the inlet side of the fans and exits through an axial route from the outlet side. The pressure development of the mixed flow is greater than axial and more like the Centrifugal.
Selecting An Industrial Fan
The factors that need to be considered when selecting the type of industrial fan are as follows:
The density of the air that is to be moved
Humidity
Air temperature Actually, many factors impact fan specification and applications that demand specific air movement characteristics for cooling, aerating, ventilating, exhausting, and drying, and they should be assessed for system resistance. It is only then that the efficiency of the fan can be evaluated properly.