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Journal of Failure Analysis and Prevention

, Volume 16, Issue 1, pp 19–36 | Cite as

Investigation of Efficiency Deterioration Causes in Process Centrifugal Compressor Operation

  • Waleed Al-Busaidi
  • Pericles Pilidis
Case History---Peer-Reviewed
  • 222 Downloads

Abstract

The high operating efficiency of centrifugal compressor is a basic requirement to maintain the gas productivity and machine availability. However, there are several factors influencing the stage efficiency in the operating environment leading to a deterioration in the compressor performance in addition to its impact on the mechanical integrity of the internal components. These variables can be classified into three main groups which are suction parameters variation, flow profile distortion, and compressor component damage. The determination of the root cause will help for a proper maintenance plan and to reduce the machine downtime. Hence, this paper will introduce a new approach to identify the inefficient compressor operation causes based on the available operation data. The investigated case is a three-stage gas transport centrifugal compressor driven by 2.9 MW two-shaft gas turbine. The outcomes from the conducted optimisation are compared with the measured discharge parameters and the findings from the internal inspection observation to emphasize the outcomes from the derived approach.

Keywords

Centrifugal compressor Performance deterioration Inefficient operation 

List of Symbols

η

Polytropic efficiency

nv

Volume polytropic exponent

nT

Temperature polytropic exponent

X, Y

Compressibility functions

k

Specific heats ratio

Ab, Bb

Correlation coefficients

MW

Molecular weight

φ

Flow coefficient

hp

Polytropic head

s

Work coefficient

u

Tip blade speed

bara

Bar absolute

MSCMD

Metric standard cubic meter per day

CMH

Cubic meter per hour

\(\rlap{--}{\dot V}\)

Inlet volume flow

BHP

Brake horsepower

Z

Compressibility factor

N

Rotational speed

OP

Operating point

DP

Design point

R

Gas constant

ρ

Density

Subscripts

act

Actual

i

Different rotational speeds

Ref

Reference conditions

DP

Design point condition

OD

Off-design condition

s

Compressor suction

p

Polytropic

Notes

Acknowledgments

The first author would like to thank Cranfield University and Petroleum Development Oman Company for their contributions in this study.

References

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Copyright information

© ASM International 2016

Authors and Affiliations

  1. 1.School of Aerospace, Transport and ManufacturingCranfield UniversityBedfordshireUK

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