Cooling towers

Lots of uses
Cooling towers are used with great advantage in industries using cooling water e.g. in process cooling, cooling of condensers, hydraulic oil, autoclaves, evaporators, extruders, fermenters and engine testing beds.

Excellent operating economy
Compared to other cooling methods cooling towers have very low power consumption. Todays increasing water and sewage costs make recycling of cooling water more and more cost-effective. Furthermore cooling towers also offer an efficient and low-cost solution for heat recirculation systems, when removing surplus heat during the summer.

Small Capacity   Medium Capacity   High Capacity
IMG 4844 Medium   Vaexjoe Energi 20212 003 Medium   IMG 37751 Kontrast Amh Medium
The small capacity Open Cooling Towers from Vestas industrial cooling are made of corrosion resistant Fibreglass Reinforced materials together with ... Read more here->   The OCT04 - 09; our medium range of cooling towers are all fabricated from corrosion resistant Fibreglass Reinforced materials together with... Read more here->   OCT26-52 series are the largest designs ofOpen Cooling Towers from Vestas industrial cooling. A combination of fibreglass and acid-resisting steel... Read more here->

What is a cooling tower?

A cooling tower is a specialised heat exchanger which dissipates waste heat to the atmosphere through the cooling of water to a lower temperature than the ambient. The heat rejection in a cooling tower is by means of proportion of the circulated water being evaporated to the atmosphere providing significant cooling to the rest of that water stream. The heat from the water stream transferred to the air stream raises the air's temperature and its relative humidity to 100%, and this air is discharged to the atmosphere. Evaporative heat rejection devices such as cooling towers are commonly used to provide significantly lower water temperatures than achievable with an "air cooled" or "dry" heat rejection devices, like the radiator in a car, thereby achieving more cost-effective and energy efficient operation of systems in need of cooling.

Cooling towers come in many shapes and sizes, from the big concrete natural draft towers to much smaller prefabricated package towers and all sizes in between. The smaller cooling towers are invariably assembled in the factory with the lager designs being erected on site.

Common applications for cooling towers range from providing cooled water for process manufacturing, engineering, power generation and heating and ventilation, (HVAC). Small cooling towers are designed to process small volumes of water while the larger can cool hundreds of thousands of gallons per hour.

Cooling Towers from Vestas Industrial Cooling are typically grouped into 3 groups. Small, medium and Large.

The Small OCT cooling towers range from 12m to 42m. These small capacity CoolingTowers are factory assembled and ready for operation.The design is optimized for easy installation and for convenient and reduced transportation cost. The combination between steel and FRP offering low maintenance, corrosion resistance, small investment and operational cost.

Our medium range OCT05, OCT06 and OCT09. As with the small towers The Medium capacity Cooling Tower is in most cases factory assembled and ready for operation. The design is optimized for easy installation and fit containers for convenient and reduced transportation cost. These are suited to larger process.

Our largest range of towers are the OCT26, OCT52 and OCT134 are designed for more demanding processes and are typically supplied without an integral cold water basin. As all of the cooling towers from Vestas Industrial Cooling are modular by design it provides end users with the opportunity to scale up if the process should increase.

Our cooling towers can be supplied with various options, Service platform, Noise damping / low noise, Inlet filters

Water level control
Tanks, reservoirs, valves
Special fill, anti bacterial
Heaters for Winter operation
Options in the Cooling Tower:
Specific design and choice of color
Erection team or supervisor
Engineering assistance
Environmental advice
Compliance with various European standards

Distribution

The cooling process starts with the hot process water being delivered to the cooling tower and is delivered to the top of the cooling tower by ta pump and distribution piping. In an open evaporative tower, the hot water is distributed through spray nozzles onto the heat transfer medium (fill) inside the cooling tower. In an open tower, a cold-water collection basin at the base of the tower gathers the cooler water after it has passed through the heat transfer medium. The cool water is then pumped back to the process or condenser to complete the cooling-water loop. In a closed circuit tower, the condenser water cools as it moves through the piping in the tower and returns to the chiller plant.

Heat Transfer Medium (Fill)

Cooling towers use evaporation to release waste heat from a process. In an open circuit tower, hot water from the process is slowed down and spread out over the fill. Some of the hot water is evaporated to the atmosphere, or over the closed-circuit tubes, which cools the water. Cooling tower fill is typically arranged in packs of thin corrugated plastic sheets. However some fill can come in a mesh form or even plastic grids for highly polluted water.

Air Flow

The air flowing through the heat-transfer medium helps increase the rate of evaporation and the cooling capacity of the tower. The cooling-tower fans generate this airflow. The size of the cooling-tower fan and airflow rate are selected and designed to achieve the desired cooling at design conditions of condenser-water temperatures, water flow rate, and wet-bulb temperature.

Most Cooling towers operate with propeller fans. Small fans may be connected directly to the driving motor some designs require an intermediate speed reduction provided by a geared motor. The fan and drive system operate in conjunction with the control system to control start/stop. Variable-speed drives (VSDs), when added to the fan motors, control fan speed and more precisely regulate the temperature of the water as it leaves the tower.

Drift Eliminator

Drift eliminators are now designed to be of a 3-pass design. This process is to ensure water droplets are not released into the environment. The performance of the drift eliminators is indicated by the ratio drift loss/water flow rate. The efficiency of droplet separation depends on constant air velocity and an absolutely tight assembly of drift eliminator elements.

Air Inlet

Air inlet elements improve the air flow into the cooling tower. They not only hold back unwanted elements (e.g. leaves) but also prevent water splash-out which can cause icing and loss of expensive water and treatment chemicals. Moreover, they restrict the amount of sunlight entering the cooling tower thereby impeding algae growth. Also the tower‘s clean appearance is maintained.

Water Treatment

In operating a cooling tower it is imperative that a water treatment regime is implemented. Cooling Towers can provide an ideal environment for various types of bacteria to proliferate, such as Legionella which in some cases cause death. A good water treatment plan can also contribute to the life span of the cooling tower.

For more information on cooling towers from Vestas Industrial Cooling please send your enquiry to info@vestasindustrialcooling.com

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