The fan forces air into the tower, creating high entering and low exiting air velocities. Remaining heat removed by passing airflow through the cooling tower. Based on the movement of Air and the Hot Water Flow these can be classified into two types: Cross flow is a design in which the air flow is perpendicular to the water flow. Mechanical draft cooling towers utilize power driven motor fans to force or draw air through the tower. Example 1-2. The spray helps ensure a uniform distribution of the water over the fill, and the droplets provide a large surface area for air contact. Hot water is sprayed from the nozzles for increasing the heat transfer surface area. They are classified by the type of draft (natural or mechanical) and by the direction of air flow (counter or cross). Types of Cooling Towers One way to distinguish between cooling towers is how the air and water interact, open cooling towers or closed cooling towers. in this design hot water enters at the top & air enters from the bottom and exit at the top of the tower. This was the classification of mechanical draft industrial cooling tower based on the placement of fans. A skilled water treatment expert can give you an overview of the type of system you may need, but most cooling tower water treatment will include a few specific features most of the time. Hyperboloid shape aids in accelerating the upward convective air flow, which improves cooling efficiency. A large amount of heat generated by industrial processes and different machines should be removed if you want your system to operate efficiently and to decrease the amount of money you need to pay for the extra pressure that such inefficient systems use. In this type of cooling tower air flows in opposite direction to the water flow. What is a Cooling Tower A cooling tower extracts heat from water by evaporation. cooling water. Below, we’ll discuss some of the different cooling tower types. Cooling tower works on the principle of evaporation. Water in the tower packing, water from top to bottom, air from the bottom, both flow to the opposite of a cooling tower. Forced draft cooling tower. Natural Draft Cooling Towersare usually used for large power plants and industries with infinite coolin… 8.3.2 Layout. Dry Cooling Towers: In this type of cooling tower, the working fluid is channelled through tubes which collects the ambient heat and then this heat is exchanged with atmosphere using air as a medium. Since these are smaller they only come in tonnages up to around 1,500 per cell. Air flow first enters an open area beneath the fill media and then drawn up vertically. In most of the industrial process,water is widely used as a cooling medium because it is very efficient,readily available & relatively cheap. Mechanical type cooling tower is more beneficial than natural type cooling tower because of :- Required fields are marked *. After exchanging heat from those equipments, its temperature got increased hence it is sent to cooling tower. Different types of cooling tower fills decide how to install them into the towers. These types include crossflow, counterflow, and hyperbolic. These large fans force or suck air through circulated water. fan is installed centrally at the the top, which creates suction in the cooling tower and discharges it to the atmosphere. In a dry tower the water passes through a heat exchanger where it is cooled by air. Water cooled after heat transfer collected at basin or the bottom of the tower and hot/Warm and moist air get discharged from the top of the tower to atmosphere. Rutger Botermans, Peter Smith, in Advanced Piping Design, 2008. We offer an extensive selection of cooling towers for commercial HVAC, process cooling, power generation and industrial processes. 1. During the cooling tower working process, small volumes of water evaporate, lowering the temperature of the water that’s being circulated throughout the cooling tower. As the flow of water and air cross each others, these types of cooling tower are called as cross flow cooling tower. Typically 75% to 80% of heat is removed from water by evaporation process. Cooling towers use the principle of evaporation of water against the air flow. It is an artificial device used to cool the hot cooling water coming out of condenser effectively. 2. Forced draft cooling tower 2. Central air conditioners and heat pumps are designed to cool the entire house. Cooling Tower fans Purpose: To move a specified quantity of air through the system, overcoming the system resistance, which is defined as the pressure loss. Natural Draught Cooling Tower: In this type of cooling tower, fan is not used for circulating air but … A Forced draft cooling tower is a mechanical draft tower with a blower type fan at the intake. This is the basic flow of cooling water, where cooling water taken from the reservoir and pumped to the plant and after that the temperature is reduced by cooling tower and again it pumped to the plant. Utilities are equivalent to the heart of any industrial process as they play an important role in maintaining adequate requirement of a product process. Working principle of mechanical cooling tower is pretty much same as natural cooling tower which is principle of evaporation but the only difference is here the air is circulated into the cooling tower is through mechanical means. Industrial cooling tower is a device which act as a heat rejection equipment. As shown in Fig. Cooling tower is a special type of heat exchanger which rejects waste heat to the atmosphere by making direct contact between air and water to lower down the temperature of water. Let us discuss each of … The tower approach is defined as the difference between the water temperatures leaving the cooling tower minus the entering wet-bulb temperature. A cooling tower performs to cool down the water used in the industrial process. Natural draught tower utilize the principle of buoyancy to achieve the desired effect. Forced draft cooling tower. Hot water that comes from the plant and is to be cooled pumped using pump to the top of the cooling tower which is considered as inlet of cooling tower or hot water inlet. The process and the tower design are the most important factors when considering the type of packing to use.The process determines the water quality and temperature.In areas of fouled water it is important to ensure that the packing does not clog up and reduce its performance. I am very passionate about researching water treatment products available on marketplaces. The water treatment option that is best for your cooling tower will depend on what type you have (for example, closed loop versus open circulating), the chemical makeup of the circulating water, and whether or not you reuse blowdown for the cooling tower. Wet Cooling towers: It is also known as open circuit cooling towers. Types Of Cooling Towers-Comprehensively the cooling towers are grouped by the sort of air acceptance used and are delegated a characteristic draft and incited draft cooling towers. Mechanical type cooling tower working much similar as natural type cooling tower. For circulation proper size fan or centrifugal fan are used. The purpose of filling mater is to provides a more contact surface area for heat transfer. An drift eliminator is installed inside the tower to prevent loss of water droplets along with the forced air. Closed cooling systems use dry, wet or hybrid cooling towers. Fresh air is induced  at bottom of the tower and which then flows in the upward direction where heat transfer takes place between warm water coming from top and and cool air coming from lower side. Natural Draft cooling towers use the design and shape of the tower itself to move up the air naturally using fans. Cooling Tower is also a water saver equipment where you can save huge amount of water by recycling the water. Air flow enters one or more vertical faces of the cooling tower to meet the fill material. The only between the induced draft cooling tower and forced draft cooling tower is that the fan is located at the top in the induced draft cooling tower. The device that comes in use for releasing the heat to the atmosphere is known as “cooling tower.” Let’s understand the basic concept of how does a cooling tower work and what the varieties are there in the market. read If you find this information useful then do appreciate us in the comment section and incase you find some information missing then let us know, we will incorporate in in our article. There are different types of industrial cooling tower. 1. What is Cooling Towers | Types Of Cooling Towers What is Cooling towers. In crossflow cooling towers air enters at 90 degree to the direction of water. For the price, it is an expensive type of cooling tower and also gets vulnerable in the cold. Induced draft cooling tower. The cooling component of this new electricity station is a natural draft cooling tower 200 m high, the tallest cooling tower and the largest shell structure in the world. Cooling towers use the principle of evaporation of water against the air flow. Dry Cooling Towers: In this type of cooling tower, the working fluid is channelled through tubes which collects the ambient heat and then this heat … Model T-3500 Cooling Tower from Cooling Tower Systems, Inc. Chapter 5: Mechanical Maintenance Practices Cooling towers, like any other equipment, must be routinely inspected and maintained to ensure adequate and efficient delivery of required cooling while maintaining (or … A Chemical Engineering professional who is learning and developing himself to get into more deeper of engineering concepts. Gravity distributes the water through the nozzles uniformly across the fill material. In crossflow cooling tower, hot water sprayed from the top which is perpendicular to air which enters from the side walls of the tower horizontally and then rise upward from the center of the cooling tower. In Forced draft system, exhaust fan placed at the base which forced the air to flow  from bottom to top of the tower. Construction of Cooling Tower. Mechanical draft cooling tower are again of two types: 1. Cooling towers are a special type of heat exchanger that allows water and air to come in contact with each other to lower the temperature of the hot water. No liquid or water is hence used for cooling in this type of setup. Induced draft cooling tower. The basic working principle of cooling tower is to cool the hot water with the help of atmospheric air. To help understand how Cooling Towers work, let’s look at an example of a typical, common Cooling Tower found on a city office type building. Enter your email address to subscribe to this blog and receive notifications of new posts by email. 2. Natural draft cooling tower: A large tall tower which is also wide-mouthed is used for this type of cooling. Liang Chi cooling tower Sdn Bhd Liang Chi Cooling Tower is a leading global manufacturer of cooling towers since 1962, headquartered in Taipei, Taiwan. The main function of cooling tower is to reject heat of hot water into atmosphere & cooling down the water for further reuse.There are different types of cooling tower. Mechanical draft cooling towers. Water cooled after heat transfer collected at basin or the bottom of the tower and hot/Warm and moist air get discharged from the top of the tower to atmosphere. The height of the cooling tower in thermal power plant is about 9 feet or above from the ground level. The purpose of filling mater is to provides a more contact surface area for heat transfer. What is the Cooling Tower? When a closer design approach is chosen, the resulting cooling tower provides colder water to the chiller condenser, even on a design day, which in turn reduces compressor energy. In Forced draft system, exhaust fan placed at the base which forced the air to flow from bottom to top of the tower. It is used in industries to reduce temperature of water and thereby provide cooling water utility for the process. Water treatment for cooling towers depends heavily on the material that the tower system is made of, as well as the properties of the water in your area. Crossflow towers. The height of the cooling tower in thermal power plant is about 9 feet or above from the ground level. We use cookies to ensure that we give you the best experience on our website. Types of Cooling Systems Central Air Conditioners and Heat Pumps. The dry and cool air from outside the tower will fall in, creating a constant cycle of air flow. The common working principle employed by most of the towers is “evaporative cooling”. It utilises the principle of buoyancy to achieve the desired effect.The warm and moisture-laden air inside the tower will naturally rise towards the dry and cooler air outside the tower and this differential acts as a medium of heat exchange. Work done by the fan: air flow x pressure loss Efficient System Operation of a Cooling tower Natural draft cooling towers 2. 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