Cooling tower is a device which cools water with the help of evaporation.
Industrial cooling towers play a vital role in modern manufacturing by removing excess heat from industrial processes and enabling the continuous recirculation of cooling water. They are widely used in steel plants, power plants, chemical industries, paper mills, textile industries, food processing facilities, and many other industrial sectors.
The following explanation is shared by Dr. Roger Kumar, Founder & Managing Director of CASE Group, based on his engineering experience in industrial cooling systems.
Expert Explanation by Dr. Roger Kumar
Founder & Managing Director, CASE Group
- 30+ Years in Industrial Engineering
- Founder of CASE Group (Since 1993)
- Expert in Cooling Towers & Coal Gasification
- Recognized by AsiaOne for Sustainable Energy Leadership
- Speaker at Leadership Excellence Summit 2025
Cooling towers are essential in industry to dissipate heat, cool water and enable its recirculation. It is based on the principle of evaporation which takes the latent heat from water and reduces its temperature.
Why is a Cooling Tower Required?
Water is the cheapest form of coolant in the industry. Whenever any machine is working in the industry, it gets heated because of the working. Now, that heat needs to be dissipated.
You either dissipate it with air, which is also cheap, or you can dissipate it with water.
Now, if you dissipate with air, the specific heat of air is one-fourth of that of water. So air-cooled systems are four times bigger and cost more.
The second way is to cool with the help of water.
Now, when you cool with the help of water, water gets heated. So what do we do with it?
Either you throw the water out and you use fresh water.
Now, water is also expensive now. It comes with some cost. There’s a pumping cost. There is a cost of bore water also these days because of the scarcity of water.
So that water needs to be recirculated.
When you recirculate heated water, that water has to be cooled in a device. That device is called a cooling tower.
How Does a Cooling Tower Work?
The cooling tower working principle is based on psychrometry.
It evaporates a part of the water, and when that water evaporates, it takes the latent heat of evaporation.
That latent heat of evaporation is taken from the remaining water.
As a result, the remaining water loses heat.
There is a simple formula:
Q = m × s × θ
If the heat value is less, the mass remains the same, and the specific heat remains the same. The only component that decreases is θ (temperature).
Therefore, the temperature of the water comes down.
This is how a cooling tower cools the water every time it passes through the tower.
How Does a Cooling Tower Help?
So you cool the water in the cooling tower and you recirculate it back into the machine which is required to be water-cooled.
The water remains in a continuous recirculation process, and the machine gets cooled all the time.
It can run 24/7.
Most cooling towers run 24/7 throughout the year unless they are shut down for maintenance.
Water Evaporation in a Cooling Tower
The amount of water that evaporates is directly proportional to the Delta T achieved.
The greater the Delta T, the greater the evaporation.
The evaporated water has to be replaced by an external water source.
Main Components
- Fill Media
- Fan
- Water Distribution System
- Drift Eliminators
- Cold Water Basin
- Pump
- Casing
Applications
- Power Plants
- HVAC Systems
- Chemical Industries
- Pharmaceuticals
- Food Processing
- Petrochemical Plants
- Steel Industries
- Data Centers
Types of Cooling Towers
- Natural Draft Cooling Towers
- Mechanical Draft Cooling Towers
- Induced Draft
- Forced Draft
- Crossflow Cooling Towers
- Counterflow Cooling Towers
This RT series consists of cooling towers, which are square / rectangular in shape. The series is specially designed for high water flow rates because of its multi cell feature. A number of cells can be clubbed together forming multi cell cooling tower thus giving the end user performance and efficiency.
This type of Cooling Tower is round bottle shaped in design. They come in completely knocked down condition. This feature enables them to be easily and economically transported and can be effortlessly installed on high-rise buildings
As the name suggests, these Cooling Towers are constructed of RCC outer structure. These Cooling Towers are permanent structures in the industry and find a place where the water requirement is of very high capacities for e.g. in huge fertilizer plants, power plants etc
This is a contractor’s delight!! No nuts & bolts. Minimum usage of steel. The SQ series cooling tower is designed keeping in mind the small applications of the Cooling Tower. These Cooling Towers can dispatch in totally erected form from our works resulting in no botheration of erection at site.
Also, known as Timber Cooling Tower, this type of cooling device is constructed with chemically treated wood. The wood structure tower is designed with counter/cross flow design, suitable for industrial use in steel mills, Petrochemical mills etc.
Why Choose CASE Cooling Towers
- High Performance with zero spillage.
- Corrosion-Resistant Construction (FRP Casing with stainless steel fasteners are used)
- Energy Efficient ( Aerodynamic shape of motor fan which take very less energy to perform its task)
- Provide PVC water distribution system with low pressure nozzle which helps to cooling rate faster with better cooling
- Fill media is PVC inverted splash V bar give high performance of cooling.
- Customized Designs
- Low Maintenance
- Expert Technical Support
- Reliable After-Sales Service
- Ease to operate and handling
Frequently Asked Questions about Cooling Towers
What is a cooling tower and how does it work?
A cooling tower removes heat from industrial processes by cooling down water using air flow and evaporation. CASE Cooling Towers use advanced technology to ensure efficient heat rejection.
Which industries commonly use cooling towers?
Cooling towers are used in power plants, chemical processing, steel manufacturing, textile units, and many more industrial facilities requiring process cooling.
What are the different types of cooling towers offered by CASE?
CASE offers a wide range of cooling towers including FRP ( SQ Series, RT Series )concrete type, and customized cooling solutions as per industrial needs.
How do I choose the right cooling tower for my industry?
Selection depends on your process heat load, ambient temperature, water flow, WBT. Contact CASE for expert guidance. Selection depends on your process
What are the advantages of FRP cooling towers?
FRP towers are corrosion-resistant, lightweight, durable, and require low maintenance, making them ideal for harsh industrial environments.
How often do cooling towers require maintenance?
Routine inspection every 3–6 months is recommended, while full-scale cleaning and servicing may be needed annually, depending on usage.