96/01952 An exergy method for compressor performance analysis

1996 ◽  
Vol 37 (2) ◽  
pp. 132
Keyword(s):  
Performance Analysis ◽  
Compressor Performance ◽  
Exergy Method

On-Line Monitoring Software and Diagnostic Tool for Centrifugal Compressor Performance Evaluation

2006 ◽  
Author(s):  
Kamorudeen B. Abidogun ◽  
Mohamed S. Al-Ghamdi ◽  
Adel Al-Ali ◽  
Khalid Al-Yousef
Keyword(s):  
Performance Evaluation ◽  
Performance Analysis ◽  
Centrifugal Compressor ◽  
Intelligent System ◽  
Accumulation Rate ◽  
Gas Analysis ◽  
Actual Performance ◽  
Process Gas ◽  
Performance Deterioration ◽  
Compressor Performance

In-house developed centrifugal compressor performance software was customized for PETROKEMYA (an affiliate of SABIC) Olefins III cracked gas compressor (CGC), the heart of ethylene plant. The software provides live performance analysis of the machine by calculating, per section, polytropic efficiency, polytropic head, and gas power using Lee-Kesler equation of state. Gas analysis is read online to reflect the minute changes in the composition on the calculated parameters. Actual operating parameters are plotted continuously and compared to the performance curves in order to predict possible performance deterioration before it becomes too late. Such information is useful in determining future maintenance requirements based on the actual performance of the machine rather than the traditional time-based maintenance. Moreover, it ensures proper timely action through optimization of wash oil or other chemical injection to help minimize fouling accumulation rate and maximize production and machine availability. Features are introduced to enable performance analysis of the compressor since commissioning to be carried out by click of a button, providing useful information for upgrading and troubleshooting. Unlike its commercially available counterpart with write-protected restrictions, the software is easily modified for additional features that are of interest to Engineers. Features planned for the future include adding intelligent system capability for predicting performance deterioration severity, auto-notifying agents etc. Performance evaluation of a 45 MW, five section process gas compressor before and after turnaround (T/A), clearly revealed the fouling prediction capability of the software.

Wet Gas Performance of a Single Stage Centrifugal Compressor

2008 ◽  
Author(s):  
O̸yvind Hundseid ◽  
Lars E. Bakken ◽  
Trond G. Gru¨ner ◽  
Lars Brenne ◽  
Tor Bjo̸rge
Keyword(s):  
Performance Analysis ◽  
Centrifugal Compressor ◽  
Single Stage ◽  
Water Mixture ◽  
Performance Parameters ◽  
Operating Range ◽  
Wet Gas ◽  
Gas Compression ◽  
Compressor Performance ◽  
The Impact

This paper evaluates the performance analysis of wet gas compression. It reports the performance of a single stage gas centrifugal compressor tested on wet gas. These tests were performed at design operating range with real hydrocarbon mixtures. The gas volume fraction was varied from 0.97 to 1.00, with alternation in suction pressure. The range is representative for many of the gas/condensate fields encountered in the North Sea. The machine flow rate was varied to cover the entire operating range. The compressor was also tested on a hydrocarbon gas and water mixture to evaluate the impact of liquid properties on performance. No performance and test standards currently exist for wet gas compressors. To ensure nominated flow under varying fluid flow conditions, a complete understanding of compressor performance is essential. This paper gives an evaluation of real hydrocarbon multiphase flow and performance parameters as well as a wet gas performance analysis. The results clearly demonstrate that liquid properties influence compressor performance to a high degree. A shift in compressor characteristics is observed under different liquid level conditions. The results in this paper confirm the need for improved fundamental understanding of liquid impact on wet gas compression. The evaluation demonstrates that dry gas performance parameters are not applicable for wet gas performance analysis. Wet gas performance parameters verified against results from the tested compressor is presented.

Assessment and Performance Analysis of Centrifugal Compressors

2000 ◽  
Author(s):  
A. Whitfield ◽  
M. A. Johnson ◽  
M. Dosanjh
Keyword(s):  
Performance Analysis ◽  
Incidence Angle ◽  
Gas Pipeline ◽  
Assessment Procedure ◽  
Vaneless Diffuser ◽  
Flow Angle ◽  
Absolute Flow ◽  
Compressor Performance ◽  
And Performance ◽  
Velocity Diffusion

Abstract A centrifugal compressor performance analysis and assessment procedure is described which is based on the measurement of the basic performance characteristics of the compressor only. It is shown that a useful assessment of the compressor performance can be carried out within the uncertainty bounds of a one-dimensional analysis common to a more detailed experimental study. The analysis procedure provides details of the impeller performance in terms of relative velocity diffusion ratio, and details of the impeller/diffuser interface in terms of the absolute flow angle, incidence angle and Mach number. If the compressor design incorporates a vaneless diffuser the flow angle at the volute inlet can be found, leading to a good assessment of the volute performance. The procedure was applied to a small turbocharger compressor with a vaneless diffuser and a number of gas pipeline compressors with vaned diffusers. The ability to derive the required aerodynamic parameters and the limitations involved are described with reference to one of the gas pipeline compressors and the turbocharger compressor.

On-Design and Off-Design Performance Analysis of a Hybrid MCFC-Micro Gas Turbine System Using the Exergy Method

2005 ◽  
Author(s):  
Huisheng Zhang ◽  
Hongliang Hao ◽  
Shilie Weng ◽  
Ming Su
Keyword(s):  
Power Generation ◽  
Fuel Cells ◽  
Performance Analysis ◽  
Power System ◽  
Gas Turbine ◽  
Molten Carbonate ◽  
Design Point ◽  
Micro Gas Turbine ◽  
Molten Carbonate Fuel Cells ◽  
Exergy Method

Molten carbonate fuel cells have been revealed to be very attractive power generation system, promising highly efficient electricity generation and very low environmental impact. The integration of micro gas turbine and molten carbonate fuel cells has been proposed in the last years as an extremely efficient solution for power generation. A steady-state thermodynamic exergetic model for MCFC/MGT hybrid power system is developed on the IPSEpro simulation platform, and applied to a performance analysis of exergy. The exergy method highlights irreversibility within the system components, and it is of particular interest in this paper. The simulation results show that the coupling of MGT with a MCFC reactor has shown a potential for an exergy efficiency of plant over 55% at design point and high efficiency at off-design point compared to other conventional power system.

Performance Analysis of a Microturbine Centrifugal Compressor From a Manufacturing Perspective

2011 ◽  
Author(s):  
A. Javed ◽  
M. Olivero ◽  
R. Pecnik ◽  
J. P. van Buijtenen
Keyword(s):  
Performance Analysis ◽  
Centrifugal Compressor ◽  
Cost Effective ◽  
Geometric Information ◽  
1D Model ◽  
Zone Modeling ◽  
Computational Fluid Dynamics Cfd ◽  
Compressor Performance ◽  
Secondary Zone ◽  
Geometric Changes

Gasturbine part manufacturers are often not involved in the design process. This means opportunities to optimize the design including manufacturing issues are missed. This paper presents a performance analysis of a microturbine centrifugal compressor from a manufacturer’s perspective. A one-dimensional (1D) performance modeling tool has been devised to predict the design and off-design performance by sequentially calculating the processes in the impeller, vaneless diffuser and scroll. Part drawings have been used to obtain the geometric information. Comprehensive two-zone modeling has been applied along with a set of meanline empirical loss models integrated in the secondary zone to estimate the entropy gain. This novel methodology has allowed the calculation of individual impeller loss mechanisms instead of predicting them as bulk. Computational Fluid Dynamics (CFD) has also been used to quantify the secondary flow properties and improve the 1D model. The results have been validated through a comparison with the microturbine test data. A sensitivity analysis has been performed to investigate the influence of geometric changes upon compressor performance. The study is important to develop design for manufacturing capability and optimize the designs for cost-effective manufacturing.

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