1. What is cooling towers?
A cooling tower is a heat rejection device, which extracts waste heat to the atmosphere though the cooling of a water stream to a lower temperature.

2. What are the types of cooling towers?
* Counterflow induced draft cooling towers
* Cross flow induced draft cooling towers

3. What is the difference between a "Counterflow" and a "cross flow" cooling tower?
    The crossflow or counterflow designation characterizes the orientation of the airflow within the heat-transfer media (fill) in the tower with respect to the direction of water flow. In counterflow towers air travels vertically upwards through the fill and makes intimate contact with water droplets falling down through the fill media. Hence the air and water travel in opposite directions. In crossflow cooling towers the air passes through the fill media in a horizontal direction, thus crossing the downward water flow. Counterflow towers are inherently more efficient than crossflow towers.

4.How does cooling actually take place inside a cooling tower?
   There are two primary mechanisms by which water is cooled inside a cooling tower. Sensible heat transfer takes place when the incoming air temperature is lower than the temperature of the incoming water, thus heat from the water is absorbed by the colder air. If that were the only cooling that took place inside a cooling tower, the cold-water temperature would be limited by the ambient temperature. However, the bulk of the cooling that takes place inside the cooling tower (>95%) is driven by evaporation of the water itself. Evaporation requires energy (heat), so when water is evaporated within the fill media in a cooling tower, heat is removed with the water vapor and leaves in the exiting air stream from the top of the tower. The result is that the remaining water is cooled significantly, even to temperatures below the actual ambient temperature.

5.What is the entering wet-bulb temperature?
   Simply stated the entering wet-bulb temperature (EWBT or WBT) is a measure of the level of humidity in the ambient air entering the cooling tower. In general, the higher the wet-bulb temperature, the more moisture that exists in the air. The wet-bulb temperature is a key parameter in the designing/sizing of a cooling tower, since it determines the degree to which more water can be evaporated. Cooling towers operating in high wet-bulb temperatures require a larger tower than those found in lower wet-bulb regions of the country.

6.What are the applications of cooling towers?
  Air Compressors, Annealing Furnaces, Autoclaves, Ball Mills, Chillers, Condensers, Cooling Rolls, Degreasers, Die Casting, Dynamometers, Extruder Barrels, Heat Exchanger, Hydraulic Oil Coolers, Induction Furnaces, Ink Coolers, Kettle Reactors, Oil Coolers, Quench Cooling, Reactors, Spot Welders, Vacuum Pumps.

7. What are the other equipments which require cooling towers?
  Abrasive, Asphalt, Automotive, Bottling, Casting, Chain Stores, Chemical, Dry Cleaners, Fabrics, Food/Beverage, Foundries, Furniture, Heat Treating, HVAC (Comfort Cooling & Refrigeration), Laboratories, Metallurgical, Pharmaceutical, Plastics, Plating, Printing, Pulp and Paper Mills, Rubber, Screw Machines, Textile, Wire and Cable Manufacturing.