Increasing demand is placed on reciprocating compressors to have more control over the flow rates. Therefore, this session examines how stepless capacity control in reciprocating compressors affects system dynamics and pulsation characteristics. We’ll analyze the specific flow phenomena created when suction valve actuators regulate capacity from 100% to zero, with emphasis on:

• Reverse flow mechanics through regulated suction valves
• Altered frequency spectra in both suction and discharge flow profiles
• Non-proportional relationship between reduced flow rates and pulsation amplitudes