Now showing items 116-135 of 180

    • Natural Frequency Whirl Instability in an Industrial Gas Turbine 

      White, Chris (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Following failure and in-situ replacement of Bearing 1 on a two-shaft 70 MW industrial gas turbine, excessive vibration was observed on Bearing 2 a few months later. This case study describes the vibration symptoms and ...
    • New Concept of On-Line Wash for Centrifugal Compressor 

      Tokuyama, Shinchiro; Mohit, Goenka; Nakaniwa, Akihiro; Mathew, Ajay; Subramani, Elumalai (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      This paper introduces the development of new concept of on-line wash oil injection system which includes the optimization of quantity of washing oil, location of injection nozzles, direction of nozzle entry, hole size as ...
    • Novel Fiber Optic Technology Monitors In-Slot Vibration and Hot Spots in an Air-Cooled Gas Generator 

      Kung, Peter; Dailey, George; Spencer, Craig; Zou, LuFan; Idsinga,Robert (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Gas-fired and air-cooled generators are subjected to continuous start-stop-load cycles related to thermal/mechanical stresses, and continuous vibration. The machines are designed to run at highly efficient material use and ...
    • NPSHR (NPSH3) IMPROVEMENT OF A LOW PRESSURE SAFETY INJECTION PUMP 

      Visser, Frank; Ketelaar, Mark (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      This case study discusses the rerate of a set of vertically-mounted singlestage end-suction centrifugal pumps used for low pressure safety injection (LPSI) in a nuclear power plant. The original LPSI pumps were supplied ...
    • On The Leakage and Rotordynamic Force Coefficients of Pump Annular Seals Operating with Air/Oil Mixtures: Measurements and Predictions 

      San Andres, Luis; Lu, Xueliang; Jie, Zhu (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      In the subsea oil and gas industry, multiphase pumps and wet gas compressors add pressure to the process fluid thus enabling long distance tie back system that eliminates topside facilities such as an oil and gas separation ...
    • On the Performance of Tilting Pad Bearings: A Novel Model for Lubricant Mixing at Oil Feed Ports with Improved Estimation of Pads’ Inlet Temperature and Its Validation Against Experimental Data 

      San Andres, Luis; Abdollahi, Behzad (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Energy efficient operation of fluid film bearings demands savings in delivery flow while also managing to reduce fluid film and pad temperatures. To achieve this goal, tilting pad journal bearings (TPJBs) implement a variety ...
    • Operating Conditions of Floating Ring Annular Seals 

      Arghir, Mihai; Mariot, Antoine (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Floating ring annular seals are used when large radial rotor displacements must be accommodated. They belong to a larger family of sealing devices that includes face seals and segmented seals. They all use carbon rings and ...
    • Operating With a Broken Pinion Teeth 

      Bhat, Vasanth; Loh, Keith (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      There was a failure in the gear box of the main feed pump of the hydrocracker unit. As no spare was available, there was no immediate fix to the failure. A quick evaluation of the damage to the gear was done and an interim ...
    • Operation of Centrifugal Compressors in Choke Conditions 

      Kurz, Rainer; Marechale, Russell K.; Fowler, Edward J.; Ji, Min; Cave, Michael J. (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Lecture 14: Centrifugal compressors are at times required to operate in or near the choke region. Various limits of the degree of allowable operation in choke have been established. Based on test data and numerical data, ...
    • Operator / OEM Collaboration on Trip & Alarm Rationalization 

      Singh Khaira, Niran; Matheidas, Michael; Meruani, Azeem; Mortada, Mohamad-Ali; Wilson,David (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Turbomachinery has increased in complexity and monitoring capabilities over the last several decades. This has resulted in an increased number of trips to protect various machinery systems. The prevailing OEM philosophy has ...
    • Other Compressors: Reciprocating, Screw (Wet and Dry), Integrally Geared, and Turbo-Expander 

      Guerrero, Armando; Raghavendr, Sreenivas; Schmitz, Ulrich (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Suggested Topics: • Offshore and marine applications • Cryogenic considerations • Industry standards – API 617, 618, API 688, API 670, etc. • Bearings, seals, and couplings • Capacity Control – Speed, IGV, DGV, ...
    • Overview of Turbomachinery for Super-Critical CO2 Applications 

      Wygant, Karl; Allison, Tim; Pelton, Robert; , (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Cycles involving super critical carbon dioxide (sCO2) have the potential to increase system efficiencies well beyond current industry norms. Research on advanced direct and indirect cycles is ongoing in national labs and ...
    • Piping and Machinery Integrity on Structurally Resonant Platforms and FPSOs 

      Cyca, Michael; Eberle, Kelly; Gendron, Guy (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Tutorial 11: Operators face significant integrity risks on offshore production facilities due to vibration of machinery and piping systems. These applications are more challenging than land-based systems because compressors, ...
    • Plunger Pump Station Vibration-Induced Cracks in Piping 

      Crowther, Paul; Eberle, Kelly; Ghattas, Mena (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Many plunger pumps are installed without adequate pulsation and vibration considerations at the design stage. Pressure pulsations from normal pump operating can cause high shaking forces throughout the entire piping system. ...
    • Polytropic Efficiency Improvements and Sustenance on Centrifugal Compressor: Corrosion Erosion and Impact of Fouling 

      Zin, Tan Chek; Sing, Ng Wei; Tharakaram, Arni R.; Koguchi, Satoshi (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Case Study 5: This paper presents a case study on the rapid deterioration of compressor polytropic efficiency relating to systemic fouling and corrosion issues. Due to such issues, compressor service life was reduced from ...
    • Pump Cavitation – Physics, Prediction, Control, Troubleshooting 

      Schiavello, Bruno; Visser, Frank (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      This short course gives insight into roto-dynamic pump cavitation and provides deeper understanding of particulars like cavitation inception, three-percent head drop, 40,000 hours life criterion, cavitation damage potential, ...
    • Recip Pump on Unstable Condensate 

      Jakubiak, Jason; Mascherpa, Luigi (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Pump Design Conditions, Sealing/Packing System Design Features, Sealing/Packing System Failures, Pump Improvements, Conclusions and Lessons Learned
    • Regional Machinery Best Practices 

      Forsthoffer, William Eugene; Forsthoffer, Michael Sean (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Tutorial 4
    • Remaining Life Assessment of Steam Turbine and Hot Gas Expander Components 

      Dowson, David; Bauer, Derrick (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Tutorial 16: In today's market place, a large percentage of oil refinery, petrochemical, and power generation plants throughout the world have been trying to reduce their operation cost by extending the service life of ...
    • Repair of Severely Damaged Rotor as an Emergency Spare 

      Laney, Scot; Richards, Doug; White, Nicholas (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Case Study 10: When the subject compressor was opened for an unrelated reason, it was unexpectedly found to have severe cracking, including a missing piece, on the first stage impeller and foreign object damage to the ...