Wet Cooling Systems

B&W SPIG can supply both mechanical and natural draft wet cooling tower systems and design for a wide range of project specifications such as high seismic loads, vibration control, corrosion resistance, noise control, sub-freezing operation, and sea water use. Cooling towers can be manufactured using fiber reinforced polymer (FRP), concrete or wood.

Natural draft cooling towers

Natural draft cooling towers, also known as hyperbolic cooling towers, are typically the preferred solution when processing large water flows such as in power plant applications. The working principle is that hot air moves upwards while cool air is drawn into the tower through an air inlet at the bottom.

The main advantages of natural draft cooling towers are that no fans are utilized, saving power and emitting lower noise. With no moving parts, there is limited maintenance and a long operating life cycle. For space limited applications, a natural draft tower can be supplied with fans located around the cooling tower circumference to increase the airflow amount and reduce the overall size.

Mechanical draft cooling towers

Mechanical draft field-erected cooling towers are used in a wide range of cooling applications such as power plants, industrial processes, refining, manufacturing and HVAC&R. Mechanical draft cooling towers use one or more large mechanical fans to move air through the tower.

Water is pumped into the tower through a main header and is sprayed over the fill surface. Depending on fan position, mechanical draft cooling towers are classified as either induced draft or forced draft, and can be either counterflow or crossflow depending on the relative direction of water and air.

B&W SPIG counterflow cooling towers are designed and configured to meet critical customer thermal performance in a cost-effective manner. Our crossflow cooling towers are designed for lower energy consumption and operating costs while providing ease of inspection and maintenance access.

FRP Cooling Towers

FRP cooling towers have gained acceptance as a smart alternative to wood, concrete or aluminum thanks to its outstanding properties. FRP cooling tower structures consist of a frame work made by structural shapes of fiberglass composite, stiffened with diagonal braces to transfer wind, earthquake and other live loads to the basin. A large area of the fan deck is walkable and designed to allow easy
maintenance.

FRP cooling towers are considered the preferred material for harsh and corrosive environments such as oil refineries and petrochemical facilities, offering these features:
• High strength
• Weather resistance
• Long-term performance and durability
• Light weight
• Dimensional stability
• Noise and vibration absorption

Concrete Cooling Towers

The concrete cooling tower structure is made with reinforced concrete and is suitable to resist aggressive waters. The precast concrete design has been implemented to meet stringent project deadlines.

The shell and structure is designed to resist wind loads as required by local codes and standards. It can also be designed to resist seismic loads if required. Concrete cooling towers can be precast or cast in situ. The use of prefabricated elements is preferred when project deadlines dictate a faster turnaround.

Wooden Cooling Towers

B&W SPIG’s wooden cooling towers use carefully selected pressure treated timber for cooling tower use. Structural cladding is provided by means of FRP corrugated panels. The fan deck provides suitable supports to withstand normal live and operational loads.

Specialty applications

B&W SPIG has also engineered and installed a variety of cooling towers in specialty applications such as hybrid cooling towers (wet and dry), sea water cooling towers, and noise-abated cooling towers.

B&W SPIG Projects

B&W SPIG Dry Cooling Systems

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