What type of compressor is characterized by having zero gas pulsations?

A centrifugal compressor is characterized by having zero gas pulsations primarily due to its design and operational principles. In a centrifugal compressor, gas is drawn into the center of a rotating impeller and then flung outward by centrifugal force, creating a continuous flow of gas. This rotational motion allows for a steady stream of gas, which minimizes fluctuations in pressure and flow, resulting in smooth operation without the gas pulsations typically associated with reciprocating and other types of compressors.

Additionally, because the gas moves through the compressor in a continuous manner rather than being compressed in discrete strokes or cycles, it ensures a consistent output and enhances the overall efficiency of the system. This is particularly advantageous in applications where smooth flow and minimal vibrations are essential, such as in large industrial and HVAC systems.

In contrast, reciprocating compressors compress gases using pistons moving in and out of cylinders, which inherently creates pulsations in the gas flow. Screw compressors also have a continuous flow but can experience some level of pulsation depending on their design. Rotary compressors may exhibit pulsations as well, especially in certain configurations. Therefore, the characteristic of zero gas pulsation distinctly identifies the centrifugal compressor as the correct choice.