Mechanical draft cooling towers are the most widely used in buildings; they rely on power-driven fans to draw or force the air through the tower. Mechanical draft cooling towers are normally located outside the building. Mechanical draft towers can be of two types that are common induced-draft and forced-draft
- Our mechanical draught cooling towers are designed for reliable winter operation when the location requires it.
The counterflow construction is an important design feature to render our cooling towers suitable for winter operation, because the cooling air first comes into contact with the water trickling down and then reaches the cooling fill.
In multicell systems it is possible to increase the temperature level by disconnecting cells stage by stage and discharging the uncooled water directly into the basin.
The possibility to lower the cooling air flow rate by reducing the fan speed is also important.
Reliable even at minus 30°C
If the modes of operation mentioned are combined in an appropriate way, the cooling towers can be operated reliably at air temperatures down to – 30°C. SPX Cooling Technologies’ mechanical draught cooling towers are used in many regions with hard winters not least because it is a known fact that they operate reliably in winter.To avoid noise pollution:
Standard mechanical draught cooling towers produce a sound emission level which, in locations near residential areas, frequently exceeds the limit values specified in the relevant noise control regulations. There are various types of sound attenuation to prevent this:
If the required degree of attenuation is relatively low, sound attenuation walls or earthwalls are erected around the cooling tower. • Droplet impact absorbers arranged above the cold water basin also attenuate the impingement noise from the falling water.
If these measures are not sufficient, sound attenuators are installed at the air inlets and above the air outlets, making it possible to reduce the noise level considerably.