Which type of compressor is known to develop the most gas pulsations?

The reciprocating compressor is known to develop the most gas pulsations due to its operational mechanics. This type of compressor utilizes a piston within a cylinder to compress the refrigerant gas. As the piston moves, it creates a cyclic suction and discharge process, leading to significant pressure changes within the cylinder.

This action inherently produces pulsating flows, particularly at higher speeds or loads, causing fluctuations in pressure and flow rates in the discharge line. These gas pulsations can lead to vibrations and noise, which are notable characteristics of reciprocating compressors.

In contrast, rotary, scroll, and centrifugal compressors operate on different principles, which allow them to maintain smoother gas flow and minimize pulsation effects. For example, rotary and scroll compressors continuously compress the refrigerant with fewer distinct cycles, leading to a more consistent discharge without the same level of pulsation. Centrifugal compressors operate based on kinetic energy conversion and tend to produce steady airflow rather than pronounced pressure changes. Therefore, the inherent design and function of reciprocating compressors primarily contribute to their higher levels of gas pulsations compared to other types of compressors.