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Cooling Tower Material and Main Components

Published on 24/2/2012 & updated on 30/7/2018
Variety of materials are used for constructing Cooling Tower structures. Materials like fiber glass are used for constructing package cooling towers. However for field erected cooling towers material like steel, fiber glass, redwood and concrete and be used depending upon the project location and client preference.
Plus and minuses of each cooling tower material is given below: Wood: Redwood as a material in cooling tower was used in 70’s and 80’s for small capacity cooling towers. Now a days because of its diminishing existance wood is not used in cooling towers.

 colling tower Following are the drawbacks when wood is used as a material:

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Cooling Tower Material and Main Components

Galvanized Steel: It is the most common construction material for cooling towers. G-235 hot-dipped-galvanized steel is suitable from corrosion resistance point of view and also having good structural strength. Stainless Steel: Further development and improvement in the cooling tower material leads to stainless steel, which is superior to G-235.
Stainless steel 304 cooling tower material is used and recommended for cooling towers installed in the highly corrosive environment. Concrete Towers: Concrete cooling towers are usually very large towers. concrete towers Salient features of concrete towers are:

Fibre Reinforced Plastics (FRP) Towers: Application of FRP towers are growing very fast and more and more process plants are replacing their old wooden cooling towers with FRP. fibre reinforced plastics (frp) towers Salient features of FRP cooling towers are:

Components of Cooling Tower

Life of a well maintained cooling towers ranges between 20 to 25 years approximately. There are two type of important components in a cooling: Replaceable Components like Non Replaceable Components/Permanent Structure like Description of the major components of cooling tower and their functions are given below:

Packing Materials Coling Tower

Is vital component of a cooling towers, as it enhances the cooling effective of the cooling tower by providing Spalsh Fills and Film fills. Splash Fills: Towers having horizontal and vertical staggered patterns to splash the hot water falling down from the top of the tower distribution deck. Splash causing the hot water to get divided in fine water droplets and increases its surface area of water between air and water. splash fills Film Fills : These are plastic corrugated sheets that are joined together to give a honeycombed appearance. Material used for film fill are PVC, Polypropylene.film fills

Cooling Tower Hot Water Distribution System

It is for distributing hot circulating water inside the cooling towers to cool the hot process water. It includes distributing basin, headers, distributing arms, spray nozzles, flow regulating valves.

Cooling Tower Cold Water Basin

Cold water basin at the bottom of the tower is designed to collect the cooled water and supply the same to the suction of circulating water pumps. Capacity of the basin should be to hold the 3 times of circulating water flow rate in gpm.

Cooling Tower Fan

cooling tower fan Fans are used in induced draft cooling towers. Commonly used blade material are FRP, Aluminum and hot-dipped-galvanized steel.

Louvers

Function of louver in cross flow cooling tower are function of louver in cross flow cooling tower Louvers are not required in counter flow cooling tower.

Drift Eliminators

Function of it is to remove the water droplet entrained in the hot air going out of the cooling towers. It reduces the drift to less than 0.0005% of the circulating water. It is made up of PVC.




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