Reciprocating Compressor

Pulsation Study for Reciprocating Compressor

The pulsation study for reciprocating compressor could be performed as per API 618, and INERTANCE has a capability to perform below kinds of pulsation analysis , shaking force estimation and mechanical study as per Design approach procedure.

  • Pulsation Study as per API 618
  • Pulsation Suppression Device
  • Pulsation Bottle Sizing as per API 618 & API 11P
  • Pulsation Induced Shaking Force (Unbalanced Forces)
  • Acoustic Simulation
  • Calculation of Peak-to-Peak Pulsation Levels
  • Piping Vibration Criteria
  • Piping Modification
  • Mechanical Review and Piping Restraint Analysis
  • Mechanical Study for Natural Frequency
  • Separation Margin Requirements
  • Pulsation Controls by Orifice
  • Acoustic Resonance
  • Acceleration Head
  • Surge Volume and Acoustic Filter
  • Helmholtz Frequency Estimation

The objective to perform the pulsation study is to avoid problems with vibration, performance, reliability, and flow measuring error caused by acoustical interaction between the compressor and the relevant piping system.
Pulsation study procedure has been determined as per API 618 guideline.

Here, INERTANCE shows the design approach for pulsation study of reciprocating compressor as follows;

Design Approach 1

Design Approach 1 is to perform the empirical pulsation suppression device design using proprietary and empirical analytical techniques to meet line side pulsation levels and the maximum pressure drop based on compressor normal operating condition.

Design approach I as per API 618
Design approach I as per API 618
Design Approach 2, Pulsation Study, Shaking Force

Design Approach 2 is to perform the acoustic simulation and piping restraint analysis, which include the pulsation control through the use of pulsation suppression devices and proven acoustic techniques. In case the detail design of piping system is finalized, the acoustic simulation has to be performed for system reliability. Then, the separation margin based on mechnical natural frequency has to be checked to avoid the mechanical resonance.

Design Approach II as per API 618
Design Approach II as per API 618

 

Pulsation Study for Reciprocating Compressor
Pulsation Study for Reciprocating Compressor
Design Approach 3, Mechanical Study

Design Approach 3 is to perform the mechanical analysis with forced mechanical response analysis in addition to Acoustic study. The forced mechanical response analysis for compressor cylinder as well as associated piping systems has to be performed as results of previous analysis results.

Design Approach III as per API 618
Design Approach III as per API 618

INERTANCE has a capability to select the sizing of surge volume as well as low pass filter, and the related pipe support design, where necessary.

Surge Volume Schematic for Pulsation study
Surge Volume Schematic for Pulsation study

 

Summary for Pulsation Controls for Reciprocating Compressor
Summary for Pulsation Controls for Reciprocating Compressor

 

Mechanical Study by Shaking force of piping system
Mechanical Study by Shaking force of piping system

INERTANCE has a capability regarding noise and vibration engineering, and our experts are familiar with assessment of Pulsation study & Mechanical study. For further information, contact us at (admin@inertance.com).

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