In a dynamic compressor, air pressure is increased by:

In a dynamic compressor, such as a centrifugal compressor, air pressure is increased by employing a series of stages. This process involves using multiple impellers and diffusers arranged in a sequence, where each stage adds energy to the air, subsequently increasing its pressure. By expanding the process over several stages, the compressor can achieve a significant rise in pressure, which is essential for many applications within refrigeration and other industrial settings.

In this multi-stage approach, each stage is designed to enhance the overall efficiency and pressure gain of the system. The use of various impellers allows for better management of airflow and pressure increases, resulting in a final discharge pressure that is higher than what would be achieved in a single stage. This method also helps in optimizing the performance of compressors operating at different conditions.

Other methods of increasing pressure, such as applying heat or reducing intake volume, do not function effectively in dynamic compressors. Dynamic compression relies primarily on the kinetic energy imparted to the air, which is transferred into potential energy, resulting in an increase in pressure. Thus, employing a series of stages is fundamentally integral to the operation and efficiency of dynamic compressors.