What is a cooling tower?
A cooling tower is used to cool water. A cooling tower is a heat rejection equipment in which water and air are brought into contact with each other in order to reduce the water’s temperature. During this process, a small amount of water is evaporated, which creates a cooling action.
Types of Cooling Towers
There are various designs and types of cooling towers, which come in numerous sizes. Understanding the different types, along with the advantages and limitations, is important when determining the right cooling tower for your project. The different types of cooling towers serve the same purpose, but they cool the water in different ways.
Crossflow cooling tower
In a crossflow cooling tower, water flows vertically down through the infill while the air flows horizontally, across the flow of the falling water. This type of tower uses gravity flow hot water distribution.
Counterflow cooling tower
For counterflow towers, air flows vertically upward, counter direction to the flow of falling water in the infill. Counterflow towers uses high pressure spray nozzles to distribute water onto the infill.
Induced draft cooling tower
Induced draft cooling towers have fans mounted on top of the unit and pull air through the infill.
Forced draft cooling tower
Forced draft cooling towers uses blowers to push air from the bottom of the tower through the infill.
Cooling tower main components
Infill – The single most important component in the cooling tower is the infill. Water is dispersed through the cooling tower infill to increase the contact surface and prolong the contact time between air and water. Cooling tower infills are available in PVC, PP, or wood type for different industries and water temperatures.
Drift eliminators – Water droplets are drifted out from the discharge air during cooling tower operation. Drift eliminators are designed to reduce water losses, allowing air to discharge while water is deposited back into the tower.
Nozzles – Cooling tower nozzles are used to provide uniform distribution of hot water inside the cooling tower. Most nozzles are made of PVC, ABS, and PP.
Float Valve – Cooling tower float valves are used to maintain the right water levels inside the cooling tower. They regulate and control the water level.
Air intake louvers – Cooling tower inlet louvers serves a few purposes. One is to prevent the sunlight from penetrating the water basin, which reduces mold and algae from forming. Air intake louvers also prevent water from splashing out and enhance the airflow into the cooling tower.
Fans – The main function of cooling tower fans is to push and force the air into the cooling tower. Fans are used to move large volumes of air efficiently with minimum vibration and noise. We offer super low noise cooling tower options for use in situations where very low sound is necessary.
Speed Reducer – Speed reducers are used to slow the rotational speed from the incoming motor to the outgoing fan of a cooling tower. A number of different reduction ratios are available to support the variable strengths and fan speeds of cooling towers. Speed reducers are available in belt and pulley or gear type.
Motor – Cooling tower motors are used to drive the fans for mechanical draft cooling towers. Motors are available in higher efficiencies IE2, IE3, IE4.
Water basin – Cooling tower basin (cold water basin or collection basin) is located below or at the bottom of the cooling tower. It aims to collect water and direct it to the water sump or pump suction line.