Design of Cooling Towers

The thermal design of cooling towers follows the same general procedures already presented. Integration of equation 35 is usually done numerically using the appropriate software, mass-transfer coefficients, saturation enthalpies, etc. In mechanical-draft towers the air and water dows are both suppHed by machines, and hence dow rates are fixed. Under these conditions the design procedure is straightforward. 

Many different designs of cooling tower are available. These can be broken down into two broad classes as follows. 

There are some general trends that can be observed for the design of cooling towers in terms of the temperature and flowrate of the inlet cooling water to the tower. Increasing... 

Figure 24.3 shows the relationship between the makeup, blowdown, evaporation and drift versus the cycles of concentration. For a given design of cooling tower, fixed heat duty and fixed conditions, the evaporation and drift will be constant as the cycles of concentration increase. However, as the cycles of concentration increase, the blowdown decreases and hence the makeup water decreases. 

The paper discusses various factors affecting the design of cooling tower pumps. A review of current cooling tower pump systems is given and efficient pump control techniques are discussed. (In German). 

Aerodynamic Design of Cooling Tower Drift Eliminators... 

Zur Auslegung von Ventilator-Kuehltuermen (Design of Cooling Tower with Forced Flow)... 

Ararat—A Computer Code for Thermal Design of Cooling Towers Mesarovic, Miodrag M. 

Design of Cooling Towers Circulating Brackish Waters Deflon, J. G. 

Earthquake Design of Cooling Towers Abu-Sitta, S. H. Davenport, A. G. 

Critical Considerations Regarding the Design of Cooling Towers, Taking Account of the Enthalpy Difference... 

The detailed design of cooling towers has been described by Hewitt et al [1994]. 

Cooling water For design of cooling tower use supply at 27-32°C (80-90°F) from cooling... 

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