Which type of compressor is commonly used as a booster compressor in a cascading refrigeration system?

A rotary vane compressor is often used as a booster compressor in a cascading refrigeration system due to its ability to provide high efficiency and a relatively smooth delivery of refrigerant at varying pressures. This type of compressor utilizes sliding vanes that rotate within a cylindrical housing, creating multiple chambers that expand and contract to compress the refrigerant effectively.

In cascading refrigeration systems, which are designed to achieve very low temperatures, having a boost from a compressor can enhance the overall efficiency and performance of the system. The rotary vane compressor is capable of operating effectively within the specific pressure ranges required for booster applications, allowing it to deliver necessary refrigerant to the secondary refrigeration cycle with improved energy efficiency.

Other types of compressors, while also used in refrigeration systems, may not provide the same performance characteristics or operational benefits in this specific application, making the rotary vane compressor a fitting choice for this role.