Which type of compressor would be least likely used in a low-pressure chiller?

In a low-pressure chiller system, the choice of compressor is critical to the efficiency and performance of the equipment. Rotary vane compressors are less suitable for low-pressure chiller applications primarily because they are typically designed for higher pressure and flow applications. Their operational characteristics do not align as well with the demands of low-pressure systems.

Centrifugal, screw, and scroll compressors, on the other hand, are more commonly used in low-pressure chillers due to their ability to efficiently handle the lower pressure ranges required in these applications. Centrifugal compressors are known for their high efficiency and capacity, making them ideal for larger chillers. Screw compressors offer reliable performance and good efficiency at varying loads, while scroll compressors are also efficient in low-pressure applications and are often used in smaller chiller units.

Thus, rotary vane compressors are the least likely to be used in low-pressure chillers, primarily due to their design and performance limitations in this specific application.