Screw Chillers- Types, Working, and Applications

Screw chillers are used in air, as well as water chillers. They are great for small to medium cooling loads and are available in 70 to 600 tons, 250 to 2100 kW.

These compressors use two interlocking rotating rotors that compress the refrigerant. Their capacity is controlled through the speed control or slider.

Types of screw chiller:

It is important to know the types of screw chillers to select the right one as per the application. Screw compressors can be single-screw or twin-screw.

·         The single-screw compressor type screw chiller

It consists of gate rotors and one main rotor, which is the driving rotor. It meshes with gate rotors and performs the compression process.

·         The twin-screw compressor type screw chiller

In this kind of compressor, there are two helical grooved rotors. When the two rotors mesh, the fluid flows. This type of compressor is used in industrial and commercial applications.

Working of a screw chiller

Normally, the male rotor is the one that is connected to the motor. It is the driving rotor. The female rotor is driven by it. When these two rotors rotate, the grooves' volume comes down, and as a result of this, refrigerant compresses.

The process starts when the inlet port sucks the refrigerant. In the next step, the tooth space is reduced when the seal line moves in the direction of discharge. It is the stage when compression happens. Compression continues till both the rotors reach the discharge port. The tooth space then discharges the refrigerant with a seal line at discharge.

Applications of screw chiller

A screw compressor is used across many industries. A screw chiller is counted as the most essential product for food cooling, and pressurized transport, and agitation in the food processing industry.

Some other applications of screw compressors include pharmaceutical facilities, machinery, electronics, civil engineering, construction, pulp and paper, automobiles, electronics, theme parks, and more!

The bottom line

The screw compressor is one of the most important parts of the machinery, and hence, it has an array of applications ranging across various industries.

Discover the Specifications of Water Cooled Scroll Chillers

Extreme tropical weather could make it challenging to cool industrial and commercial establishments. However, that does not mean that those facilities must sacrifice energy efficiency and spend more money on cooling. With a water cooled scroll chiller, they can enjoy cool water that effectively dehumidifies, cools, or humidifies the air. High-quality water cooled scroll chillers are designed and built following international standards, using the best scroll compressors by Copeland and Danfoss. They have a small footprint to allow installation in any space.

 

Standard water cooled scroll chiller models come in a range from 1KW to 203.8KW. They provide cooling in temperatures ranging from -15 degrees Celsius to 25 degrees Celsius. When you get yours from an experienced engineering team, you can be confident in the type and quality of the scroll chiller you are investing in. It will be the most suitable cooling solution that will meet your unique requirements.

 

Knowing the specifications of the water cooled scroll chiller will help you find and select one in the right size to ensure reliable and high-quality performance and a lengthy service life. Reputable manufacturers offer the range of scroll chillers from 1 to 60 tons, with a built-in tank and water pump to simplify installation either indoors or outdoors. Here’s what you need to consider when reviewing the specifications:

 

• Temperatures - A cooling capacity range of 9.2KW to 203.8KW, a set temperature range from 5 degrees Celsius to 30 degrees Celsius, and a temperature cooling vibration of ± 1 degree Celsius.
  
  
• Smart microprocessor controller – For precise temperature control and precise monitoring, with audible alarm for running failure and easy to read text display.

 

• Schneider Electric components – A high-quality water cooled scroll chiller comes with proven reliable components for important parts like the breaker, AC connector, and thermal relay for a longer service life and to ensure stability.

 

• Heat exchanging parts – Specially designed tube and shell condenser to reduce susceptibility to blocking caused by poor water quality, and a superior quality brazed plate heat exchanger for efficiency.
  
  
• Hydronic module – A built-in large-flow circulation pump and buffer tank to simplify installation and usage. Outlet and inlet water bypass valves adjust as needed to the water pressure. It is easy to check the water quality and level through the water tank sight glass.