The importance of water in the cooling tower industry – Water (part 7)
Process plants that can be cooled with evaporation systems.
The importance of disposing quantity of energy.
Efficiency of the cooling system.
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From what has been written on this subject, the disposal of heat from evaporative cooling towers use something in particular, that is, disposing large amounts of heat from the water by means of the air: two natural elements.
Heat disposal has, therefore, a relatively low cost.
To name a few examples where towers are used:
(a) disposing heat from the various refrigeration groups and city building air conditioning condensers.
(b) in industries such as oil refineries, chemical plants,
(c) in industrial process plants for the production of food products,
(d) in thermoelectric power plants,
(e) in geothermal systems.
Obviously each type of installation has different requirements for heat disposal (amount of cooled water). Temperatures and their range must be designed appropriately and carefully, and, most of all, the air thermal characteristic data to be considered for cooling tower design.
Air data has to include temperature, humidity and altitude related to the location of the tower. These three values (temperature, humidity, altitude) are very important.
If the data is not chosen correctly, this can lead to the wrong tower sizing, up to three or four times higher, or lower, than the actual needs of the system.
If the tower sizing is higher than the correct value, this will lead to waste of material and, hence, higher cost of the system. On the other hand, if faulty sizing will lead to equipment that is not adequate to the system, hence, useless!