A cooling tower is a type of heat rejection device that, as you may already be aware, dissipates excess heat into the surrounding air by reducing the temperature of a moving water stream to a lower level. In order to generate a draft of air or flow of air through the cooling tower, the vast majority of cooling towers make use of an electrical fan motor. We have compiled a wealth of information regarding the induced draft cooling tower, which is a subcategory of the mechanical draft cooling tower.
What is an Induced Draft Cooling Tower?
A type of mechanical draft tower known as a Fiberglass Reinforced Plastic (FRP) induced draft cooling tower or induced draft tower is characterised by the presence of one or more fans at the very top of the structure. These fans are designed to draw air upwards in opposition to the downward flow of water that is moving around the wooden decking or packing. Because the flow of air is in the opposite direction of the flow of water, the water that is at its coldest at the bottom comes into contact with the air that is at its driest, while the water that is at its warmest at the top comes into contact with the air that is at its most humid. This results in an increased amount of heat being transferred. The shape of a FRP induced draft cooling tower can be either square or round, and the water can be distributed using either a static branch system or a sprinkler. Induced draft towers are also available.
The Working Principle Behind an Induced Draft Cooling Tower
In induced draft cooling towers, the incoming cooling water is sprayed throughout the tower using a spray distribution header. These towers are also known as forced draft cooling towers. The spray is aimed downwards toward baffles in order to maximise the amount of time that water spends in contact with air. The “cooling water fill,” which may be made of PVC, wood, metal, or another material, is responsible for increasing the total surface area available for heat exchange. “Louvers” of the correct design are used to allow air to enter the interior of the cooling tower. The water is cooled as a result of large fans circulating air through an area that has been baffled off. A specialised piece of equipment known as a “drift eliminator” is utilised in this process in order to prevent the accumulation of water droplets in the outgoing air stream.
The Benefits of Utilizing an Induced Draft Cooling Tower
Induced draft towers are typically the most efficient and cost-effective approach to meeting the majority of a facility’s cooling requirements. The following is a list of its numerous advantages:
- It’s versatile
- It’s cost-effective
- It has simple procedures for installation and maintenance
- Produces less noise
- Offers constant airflow regardless of the temperature of the surrounding air
- Has the flexibility to accommodate any water flow
- Its operation is flexible, thanks to the ability to shut down some cells
- It has the capacity for high levels of thermal performance adaptability
- It has compatibility with all types of structures, including wood, fibreglass reinforced plastic (FRP), concrete, and steel
- It is compatible with all types of heat exchange surfaces, ranging from splash grids to high-performance film
It has the capability to provide excellent protection against icing for mechanical components.
Difference Between an Induced Draft Cooling Tower and a Forced Draft Cooling Tower
The positioning of the fan in a forced draft cooling tower versus an induced draft cooling tower is what differentiates the two designs. Forced draft cooling towers are designed to meet the requirement of atmospheric air suction. In an induced draft tower, the fan is positioned at the very top, directly above the eliminator. This ensures that the air in the surrounding atmosphere is drawn in and pushed down through the tower in the opposite direction. On the other hand, in a forced draft tower, the fan is located below the structure and outside of it. This configuration ensures that the surrounding air is drawn up through the tower beginning at its base. In addition, the use of axial fans is required for the operation of induced draft towers, whereas forced draft towers have the option of employing either centrifugal or axial fans.
In this blog, we have discussed all about induced draft cooling towers. Buy now, you must be having a fair knowledge about it. If you are planning to invest in a cooling tower then do consider investing in an induced draft cooling tower if it suits your requirements. Feel free to contact our team to get more details. We offer the best cooling towers that will suit your requirements!