Which style of compressor can NOT be used in an industrial Ammonia refrigeration system?

In industrial ammonia refrigeration systems, dynamic displacement compressors are typically not used due to their limitations with the properties of ammonia. These compressors operate by imparting kinetic energy to the refrigerant, which makes them less suitable for the specific demands and characteristics of ammonia as a refrigerant. Ammonia has a high molecular weight and can lead to issues such as wear and corrosion in dynamic systems, which affects efficiency and reliability.

On the other hand, positive displacement compressors, including reciprocating and rotary vane types, are widely used in these systems. They work by trapping a fixed volume of refrigerant and compressing it, making them highly efficient for handling refrigerants like ammonia that require reliable handling of pressures and varying temperature conditions.

Positive displacement compressors provide the necessary compression needed while effectively managing the physical properties of ammonia, ensuring robust operation within industrial settings. Their ability to handle high-pressure variations and their efficiency make them the preferred choice for ammonia-based refrigeration.