INDUCED DRAUGHT COOLING TOWERS
An induced draught tower is a type of cooling tower that uses a fan to pull air through the tower and remove heat from a process or system. The fan creates negative pressure inside the tower, causing air to be drawn in through the tower's inlet and flow upward through the tower.
The heat exchange takes place in the fills, which are the heart of the tower. The fills are designed to maximize the surface area for efficient heat transfer between the air and water. The fills are typically made of PVC or other materials with a large number of small openings, allowing the water to spread out into a thin film as it flows. This design enables greater contact between the air and water, thereby increasing heat exchange efficiency.
All the PVC fills are highly durable and reliable for various industrial applications. They are double folded at the margins, which provides excellent protection against erosion and prolongs their lifespan They have an automatic drainage system, and a design that produces a low air pressure drop coupled with high heat transfer efficiency. They are manufactured with German technology and glued using an automatic process. The fills can withstand a temperature of 65 °C without difficulty.
The drift eliminators are manufactured with German design and have high efficiency, which ensures a maximum drift loss of 0.001% under standard design conditions.
The water distribution is composed of PVC headers and sub-distribution pipes that are made of rigid PVC. The headers and sub-distribution pipes are designed to withstand high pressure and provide excellent durability. The pressure required in Bell towers is NIL; however, the distribution system is designed to withstand a pressure of 2 KSC (~20 M head).
The axial flow Fans are statically and dynamically balanced, and manufactured in strict conformance with renowned designs. All motors are of standard make TEFC, with IP 55 protection, and are co-guaranteed by the original manufacturers, such as NEI, SIEMENS, ABB and others. All the fans are direct driven, eliminating any gear box problems as experienced by others. The direct drive system ensures efficient and reliable operation, minimizing maintenance and reducing the risk of mechanical failures.
The cooling tower body, or casing, is made of corrosion resistant fiberglass, which is able to withstand harsh environmental conditions and provide long-lasting performance. Bell uses superior quality isothelic resin and FRP matting, making the components stronger for withstanding wind pressure, UV sunrays, water treatment chemicals, etc. They are available in various colour choices, making them versatile for different aesthetic preferences.
Bell's induced draught towers are designed with energy efficiency in mind, reducing operational costs and minimizing environmental impact. Furthermore, their compact design allows for flexible installation options, making them suitable for most applications.