What are the different types of cooling towers?
There are three main types of cooling towers that are defined by how water or air pass through them. These types include crossflow, counterflow, and hyperbolic. There are also two varieties classified solely on airflow, known as induced draft and passive draft cooling towers.
Which pump is used in cooling towers?
Centrifugal pumps are ideal for water cooling pumps as they are designed for the handling of water at various performance requirements. Cooling pumps, whilst generally using water, can also transfer coolants such as liquid refrigerant or glycol.
What types of motor drives are used on towers?
Today, we will be discussing the top four most commonly used fan drivers for cooling towers. As mentioned earlier, we will be talking more about the four primary types of cooling tower fan drivers- the gear drive, belt drive, direct drive, and EC motor.
What is a cooling tower motor?
Cooling Tower motors are designed for operation in high humidity environments. They are available in Totally Enclosed Air Over enclosures for mounting in the air stream and Totally Enclosed Fan Cooled enclosures for mounting outside the air stream.
What is the most common type of cooling tower?
Wet cooling towers (open circuit). These tend to be one of the most popular styles because they are cost-effective and will achieve the most possible cooling. Heat transfer is measured via a decrease within the process temperature and the wet bulbtemperature and how cold water temperature becomes. Dry cooling towers.
What is the meaning of TR in cooling tower?
Ton of Refrigeration
Ton of Refrigeration (TR): Ton of Refrigeration (abbreviated as TR) is an important historical unit of refrigeration capacity. Originally 1 TR was defined as the rate of heat transfer required to make 1 short ton (2000 lbs) of ice per day from water at 0oC.
What is CHW pump?
Chilled water (CHW) systems are cooling systems that circulate CHW throughout a building for cooling and dehumidifying a building’s air. They come in all shapes, sizes, and configurations.
How many GPM are in a ton?
As stated above, 1 ton of cooling is equal to 12,000 Btu, so a 200-ton chilled water plant has 2.4 million Btu. The most common chilled water delta T is 12°F; in the equation, the system requires a chilled water flow of 400 gpm, which equates to 2 gpm per ton.
Do cooling towers have belts?
Belts matching the profile and length requirements of the sheaves transmit power. Unlike gears, belt drives are exposed to the cooling tower’s hot, moist environment. Belt drives are often employed in cooling towers with lower horsepower requirements. Like a gear drive, the belt drive does not require a VFD.
What are the two types of fan drives?
There are two basic types of fan drives.
- Straight radial.
How is cooling tower capacity calculated?
This should be expressed in Fahrenheit and is denoted as dt in the formula. Multiply 500 times the water flow rate, times the temperature difference, divided by 12,000 or 500 x q x dt/12,000. The result is the tons of capacity of the cooling tower.
How is water cooled in a cooling tower?
A cooling tower is a specialized heat exchanger in which air and water are brought into direct contact with each other in order to reduce the water’s temperature. As this occurs, a small volume of water is evaporated, reducing the temperature of the water being circulated through the tower.