• Resolution of high vibration on a Generator 

  Ganesh , Sankar; Shalabi, Mustafa (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  This is a synchronous generator driven by a GT through a speed reduction gearbox with a rated power of 25 MW(3600 rpm). Generator bearing high vibration levels resulted in several machine trips during the startup attempt ...

• Mechanical Improvement of Electrical Interharmonics Damping 

  Hutten, Volker; Anantham, Vijay (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  During operation of compressor trains by a variable speed drive system (VSDS) integer and non-integer harmonics are generated in the inverter. Via the electrical system of inverter and motor a torsional excitation is ...

• Case Study on investigation and resolution of Dry Gas Secondary Seal Failure 

  Kamal, Girish; Salehan, Fairul Azam Bin (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  Dry Gas (DGS) Secondary Seal installed on one of the Flash gas compressor unit at an onshore gas treatment facility failed resulting in equipment downtime and process gas flaring. During detailed tear down inspection, ...

• Compressor Dry Gas Seal Failure Due To Oil Ingress 

  Kumar, Arun; Brar, Navneet Singh (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  This case study of a typical tandem arrangement dry gas seal failure during compressor start-up elaborates importance of start-up environment consideration during design for a compressor dry gas seal system. The seal failed ...

• Impeller High cycle fatigue failure on a Natural Gas Pipeline Compressor Following Choked Flow Operation 

  Moyroud, Francois; Alas, Pascal; Libeyre, Francois (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  The impeller of a natural gas pipeline compressor failed at the junction between the blade trailing edge and the hub. A root cause analysis showed the machine had been operated beyond the compressor map right limit during ...

• Dry Gas Seal Failure due to Axial Sub-synchronous Vibration on a Hydrogen Recycle Gas Compressor. 

  Eisenmann, Robert; Santos-Gutierrez (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  Approximately 6 months after commissioning a new hydrotreater hydrogen recycle gas compressor the site experienced a dry gas seal failure. The investigation revealed wear of the primary seal dynamic sealing element due to ...

• Understanding Design Parameters That Affect Thermal Stability of High-Speed Turbo Machinery (Also Known As the Morton Effect) 

  Benton, Robert; Eiswerth, Ethan (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  At present, there are no commercially available codes in industry that have proven to reliably predict a rotors sensitivity to the Morton Effect. The Morton Effect refers to synchronous rotor instability due to non-uniform ...

• Analysis and Countermeasures for Sideband of Gear Mesh Frequency(GMF) Induced by Shaft Fretting Corrosion in a Gearbox 

  Bae, Seungil; Kim, Bumsu; Jang, Jongoh; Lee, Sangjoo (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  CS deals with trouble shooting and solving a chronic fretting corrosion damage b/w a gear and shaft (shrink fit). The damage on the geared shaft always accompanied by an increase in the amplitude and frequency side bands ...

• Compressor Startup Flaring Avoidance Design Methodology 

  Amodeo, James; Narayanan, Krishnan (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  This case study outlines the methodology used to avoid the flaring of refrigerant inventory during the startup of a 3-section refrigeration compressor used in LPG chilling service. S&B Engineers and Constructors (S&B) and ...

• Preventing a Major Wreck on a New Reciprocating Compressor: The importance of commissioning testing 

  Eisenmann, Robert; Santos-Gutierrez (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  During commissioning testing of three new reciprocating compressors a fault was detected requiring the testing to be stopped. Debris was found in the bearing resulting in minor damage due to the early indication from the ...

• Steam Turbine 101/201 Combined, Basic Knowledge of Steam Turbine 

  Walton, Matt; Alvarado, Fabiola; Jain, Mayank; Takemura, Daisuke; Tasaki, Akinori (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  It is shown as the outline in this short course that the role of steam turbine, history, classification, basic structure, components and their function, manufacturing and design process and control system. And also, the ...

• A Review of the Critical Design Parameters for Labyrinth Type Separation Seals on Dry-gas-seals 

  Hanekom, Dian (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  An ethylene compressor experienced a dry-gas-seal (DGS) hang-up condition and a RCA concluded that a possible root- or contributing cause is lube oil passing the labyrinth type separation seal into the secondary DGS cavity, ...

• Gas Seal Failures Caused by Axial Vibrations 

  Byrne, James; Potter, Patrick; Vazquez, Jose (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  This case study describes the root cause investigation of 12 dry gas seal failures in three integrally geared centrifugal compressors over a period of 12 years. These compressors are in fuel gas booster service, supplying ...

• Steam Turbine with 0.9X Vibrations 

  Mialkowski, Piotr (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  This 15 MW steam turbine/gearbox/4-pole generator train, following a recent overhaul, was showing unusual phenomenon of high level 0.9X vibration during shutdown, as well as power limits due to vibration level increase. ...

• High Vibration Due to Steam Turbine Deposits 

  Yu, John; Zhou, Tony Wei; Lin, Haibo; Wang, Carl Feng; Peton, Nicolas (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  This presentation provides a case study how to correctly deal with increased vibration on a steam turbine that drives a compressor. After the machine had not operated for a week, vibration level increased 5 times during ...

• Steam Turbine Reoccurring Rubs, Troubleshooting and Corrective Action 

  Smith, Patrick; Ziegler, Brent (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  Rubs in steam turbines can be especially difficult to diagnose because the vibration signature can manifest differently depending on the location, severity, rotordynamics, machine design and bear similarities to other ...

• Cavitation/NPSH (Field Problems) 

  Schiavello, Bruno; Visser, Frank; Green, Patrick; Henry, David; Atkins, Ken; Cicatello, Giancarlo; Annese, Francesco; Curtin, Greg; Adams, Ron (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  Unexpected cavitation erosion Key parameters to consider for Root Cause Analysis when experiencing cavitation damage NPSHR, NPSHA, NPSH margin Performance loss due to insufficient NPSHA (margin) NPSH 40,000 hours ...

• Investigation and Resolution of Governing Valve Linkage Failure for Compressor Drive Steam Turbine 

  Nishiyama, Kenichi; Jain, Mayank; Subramani, Elumalai (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  Fatigue failure of Governing Valve Linkage Rod end bearing and wear marks on several parts was observed on a extraction steam turbine (driving a centrifugal compressor) after it was in service for more than 9 year. The top ...

• Cryogenic Fluid Pumping Applications 

  Hall, Lonn; Calafell, Dag; Patel, Vinod; Bailey, Bill; Loughman, David; Jarrah, Yousef; Karakas, Enver; Adams, Ron (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  Calculating efficiency, power & considerations Condition monitoring Cryogenic pump system components Accessories to cryogenic pump systems Shaft supports: bushings, bearings Rotordynamics Balance requirements ...

• Sealless Pumps 

  Wood, Daniel; Fegan, Denny; Yutzky, Keith; Moy, Matt; Hodgson, Judy; Baker, Gene (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)

  Types of sealless pumps and application limitations such as HP, pressure, temperature, solids, etc. Applications where sealless pumps have been successfully applied, and where they have failed Environmental performance ...

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