Now showing items 142-161 of 180

    • Rotordynamics Analyses of a Modified Hydraulic Power Recovery Turbine 

      Kai Chiat, Cheong; Lek, Edmund; Tzuu Bin, Ng (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Problem Statement, Machine Information, Torsional Model & Assumption, Torsional Response & Results, Tuning Methods, Field Validation, Conclusion
    • Rotordynamics, Design Aspects, Field and Operational Experiences of a Novel, Large Compressor String Supported by Active Magnetic Bearings 

      Gausmann, Rainer; Heidtmann, Frank (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      The giant Groningen onshore gas field in the Northeastern Netherlands started production in 1963. About 35 years later, the decreasing reservoir pressure required a first stage of compression to provide sufficient capacity ...
    • Save your Centrifugal Machinery during Commissioning 

      Kumar, Arun; Sabharwal, Mohit (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      During the commissioning of centrifugal machines (Compressors, steam turbines, pumps, fans etc.), a lack of flushing, inspection and ignorance of critical areas & procedures can lead to major problems, damage, and serious ...
    • Shop Rotordynamic Testing - Options, Objectives, Benefits & Practices 

      Cloud, C. Hunter; Kocur, John (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Tutorial 18: Understanding the lateral rotordynamic behavior is critical in determining the reliability/operability of rotating equipment. Whether examining a centrifugal pump or compressor, steam or gas turbine, motor or ...
    • Simplified Modal Analysis for the Plant Machinery Engineer 

      Vázquez, José A.; Cloud, C. Hunter; Eizember, Robert J. (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Tutorial 6: Experimental modal analysis and operating deflection shapes (ODS) are powerful tools in vibration analysis and machinery troubleshooting. However, the machinery plant engineer often doesn’t believe such techniques ...
    • Solutions To Requirements On Electrical Drives In O&G Applications 

      Ganesan, Vijay; Busse, Stephan; Demmig, Sven (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Lecture 3: Variable-frequency drives (VFDs) are being increasingly employed in oil and gas (O&G) applications due to their better efficiency, reliability and process control when compared to conventional drives. In comparison ...
    • Squeeze Film Dampers: An Experimental Appraisal of Their Dynamic Performance 

      San Andrés, Luis; Jeung, Sung-hwa; Den, Sean; Savela, Gregory (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Lecture 15: Squeeze Film Dampers (SFDs) are effective means to ameliorate rotor vibration amplitudes and to suppress instabilities in rotor-bearing systems. A SFD is not an off-the-shelf mechanical element but tailored to ...
    • Stability Considerations - A Simplified Approach 

      Baumann, Urs (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Tutorial 2: In many cases it is necessary to judge the stability behavior of a specific compressor. This might be the OEM checking the feasibility of a proposed compressor layout or it might be the user judging one of his ...
    • Static and Rotordynamic Analysis of a Plain Annular (Liquid) Seal in the Laminar Regime with a Swirl Brake for Three Clearances 

      Ahmed Bin Najeeb, Ovais; Childs, Dara (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Annular seals are non-contacting mechanical elements designed to reduce leakage between two areas of differing pressures such as between two impeller stages in a pump. Circumferential fluid rotation inside the annular ...
    • Steam Turbine Steam Control Valve Failure 

      Bhat, Vasanth; Suthan, Thangavel (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      The Wet Gas compressor is one of the most critical assets in a FCCU/RCCU of a oil refinery. The back pressure steam turbine driver of this compressor faced two failures in the main valve stem of the steam inlet valve. ...
    • Steam Turbine Vibration Resonance of Pedestal, Vibration Investigation with Countermeasures in Singapore 

      Ikeno, Kyoichi; Katagake, Makoto; Hata, Satoshi (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Case Study 3
    • Steam Turbines: Operation & Maintenance 

      Josefczyk , Ronald; Kumar, Arun (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Suggested Topics: • Overhaul intervals • Maintenance practices Solid particle erosion • Contract versus in-house maintenance Mechanical driver turbine issues - design et al • Steam path repairs • Turbine casing and alignment ...
    • Steam Whip Phenomenon in Steam turbine 

      Peton, Nicolas; Drygin, Sergey (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      This case study is designed to outline how the high vibration issue was successfully diagnosed, the root cause for the high vibration found and correction actions recommended. The source of mentioned high vibration - sub ...
    • Stress Corrosion Failure of a Low Pressure Disk from a 800MW Steam Turbine 

      Tipton, Anthony (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Case Study 1: Stress corrosion cracking is known to be a function of stress, material and environment. However, a fourth variable that is often overlooked is operating time. Maintaining steam chemistry within OEM and ...
    • Structural Dynamic Behavior of Frame 9E GTG Module for LNG Plant 

      Giancotti, Marco; Fattori, Stefano; Biondi, Roberto; Margiotta, Alessio (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Lecture 9: The traditional onshore installation of heavy duty gas turbine generator trains, especially for power >80MW, is stick built on heavy and rigid concrete block foundation. The challenge of modularization is that ...
    • Subsea Compression Applications , 

      Gilarranz, José; Maier, William; Baumann, Urs; Barratt, Richard; Bigi, Manuele (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Tutorial 22: The use of Subsea gas compression technology for subsea re-injection and/or gas transport boosting represents a new and exciting application for rotating equipment, which will allow new gas/condensate field ...
    • Subsynchronous Shaft Vibration in an Integrally Geared Expander-Compressor due to Vortex Flow in an Expander 

      Hirata, Daisuke; Nagai, Naoyuki; Higashimori, Hirotaka; Shoji, Yoshiaki (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Subsynchronous shaft vibration was observed in an integrally geared expander-compressor when the machine was operated with a partial load in the course of plant start up. The root cause of the synchronous shaft vibration ...
    • Subsynchronous Vibrations on a Vertical Electrical Motor During Factory Testing – Observed Phenomenon, Interpretation and Resolution 

      Gelin, Alain; Cloud, C. Hunter; Quoix, Bernard; He, Minhui (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      During the factory tests of a vertical electric driven de-ballasting pump, casing vibrations were observed on the motor above the contractual limit of 2.8 mm/s, mainly on the motor’s top, Non-Drive End. Supported by fluid ...
    • Superimposing Planetary Gears as Variable Speed Drives for Rotating Equipment 

      Tilscher, Martin; Lauter, Bernd; Lindenmaier, Jochen (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      There are many high-power and high-speed pumps installed in power plants, oil & gas applications and in petrochemical industry consuming a considerable amount of energy. Significant interest exists within operators to ...
    • Surge Exploration Tests and Second Quadrant Characteristic Dynamic Modeling on High Pressure Ratio Compressor (Hprc) Prototype 

      Baldanzini, Fabio; Pelella, Marco; Calosi, Mirco (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      High Pressure Ratio Compressor (HPRC) technology is based on an innovative architecture that combines unshrouded and shrouded impellers on a single high-speed shaft to achieve pressure ratios and efficiency levels higher ...