What type of compressor is not suitable for industrial ammonia refrigeration systems?

Dynamic displacement compressors are not suitable for industrial ammonia refrigeration systems primarily due to their operational characteristics and the specific needs of such refrigeration applications.

In industrial settings, especially those using ammonia as a refrigerant, the system often requires a compressor that can handle large amounts of gas efficiently and maintain high pressures and flow rates. Dynamic displacement compressors operate based on the principles of centrifugal force and are effective for specific applications, such as air conditioning or processes where a continuous flow and lower compressibility fluids are involved. However, ammonia, being a refrigerant that can condense and vaporize rapidly, often requires compressors that can handle changes in pressure and volume more effectively.

Positive displacement compressors, on the other hand, work by trapping a volume of refrigerant and compressing it, which makes them well-suited for ammonia systems. They provide the necessary pressure increases to facilitate the refrigeration cycle effectively. Similarly, scroll compressors can be used for smaller applications, but in the context of large-scale industrial refrigeration, dynamic displacement is less effective.

In summary, while dynamic displacement compressors have their applications, they do not align with the requirements of industrial ammonia refrigeration systems, which favor compressors that can handle the specific dynamics and properties of ammonia efficiently.