What is the practical maximum compression ratio for a rotary vane compressor?

The practical maximum compression ratio for a rotary vane compressor is typically around 4:1 compression ratio (CR). This limit is influenced by various factors inherent to the design and operation of rotary vane compressors.

Rotary vane compressors use sliding vanes within a rotor to trap and compress the refrigerant within a housing. As the rotor turns, the vanes slide in and out, creating varying volumes in which the refrigerant gas is compressed. The design limits of the construction and efficiency of these compressors mean that achieving a higher compression ratio could lead to increased discharge temperatures and potential mechanical failures due to excessive wear or overheating.

Beyond the 4:1 CR, efficiency may decrease, and the risk of operational issues rises, making it impractical for most applications. The environment in which the compressor operates, including temperature and pressure, is also a significant consideration that can affect the utmost achievable compression ratio. It is essential for users and technicians in the field to understand these limitations to select appropriate compressor types for their specific needs and maintain optimal performance and reliability in ammonia refrigeration systems.