Now showing items 103-122 of 180

    • Large Cooling Water Pump Upgrade for Increased Capacity And Reduced Impeller Cavitation 

      Visser, Frank (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      This case study discusses the hydraulic upgrade of two sets of four (25 percent) large vertical cooling water pumps. To increase the electrical output of subject power station, the cooling water pumps of block 1 and 2 had ...
    • Large Vibrations on Centrifugal Compressor Caused by Inappropriate Operation During Mechanical Running Test 

      Bidaut, Yves (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      During the mechanical test of a centrifugal compressor, the rotor experienced a sudden increase of the radial vibrations. After re-start, the compressor showed unacceptably high vibrations. The RCA revealed: The vibrations ...
    • Lubrication: Fluid Film Bearings: Operation, Maintenance, Troubleshooting 

      Byrne, James; He, Minhui; Holscher, Norbert; Pettinato, Brian (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Turbomachinery bearings: Sleeve and tilting pad journal bearings, Thrust bearings, Babbitt bearing failures Bearing upgrades: Clearances, preload, offset, Installation, Oil Specific questions: Journal bearing fit – loose? ...
    • Magnetic Bearings 

      Raghavendr, Sreenivas; Guerrero, Armando; Gupta, Manoj (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Suggested Topics: • Turbomachinery bearings • Sleeve and tilting pad journal bearings • Babbitt bearing failures • Bearing upgrades • Clearances • Installation • Oil • Annual seals • Polymer seals -Centrifugal compressor ...
    • Materials in Centrifugal Compressor and Steam Turbines: Selection, Processing, and Repair 

      Laney, Scot; Dowson, David (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Materials selection is significant with respect to performance, reliability, and longevity of turbomachinery, particularly given the increasing severity of the process environments. The trends are that the selection is ...
    • Measurements and Analysis of High Machine Vibration - A case Study of Screw Compressor Rub 

      Mekawey, Sherief; Kuebari, Dum (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Case Study 21: This case study concerns a screw compressor operating in offshore process environment with unpredictable gas composition. The compressor was tripped on high vibration during startup after seals replacement. ...
    • Mechanical (Liquid) Seals: General (Installation, Operation, Troubleshooting, and Retrofitting) 

      Asokan, S.P.; Bhat, Vasanth; Carmody, Chris; Forsthoffer, Michael Sean; Forsthoffer, William Eugene; Lalithkumar, Seetharam; Morton, John; Necker, Nikolaus; Wu, Shifeng (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Mechanical seals are the most common method of sealing industrial centrifugal pumps and other rotary equipment. Although the basic concepts of a seals are simple, successfully using seals requires an understanding of the ...
    • Mechanical Seal Failure in the Oil Flooded Compressor 

      Kim, Minho; Kim, Younggon; Kim, Mugeon (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      We consistently experienced mechanical seal failure of the oil–flooded screw compressor in the refrigeration system. The first seal failure happened on July, 2015, which is a year passed since start-up. This seal failure ...
    • Mechanical Seals with DiamondFace Technology Used in Different Pipeline Services 

      Necker, Nicholas (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Technical Brief 2: Mechanical seals are used in a wide range of industrial applications, sealing gases in a compressor or sealing liquids in a pump. Reliability, longevity, emission control and safety are now more important ...
    • Meeting Compression Train Base Package Design Requirements for Service on Floating Production Storage and Offloading Vessels 

      Miller, Harry; Abraham, Ed (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Lecture 6: Typical floating production, storage and offloading (FPSO) compression applications are presented, including drivers and auxiliary equipment, and typical compressor operating conditions. Base packages consisting ...
    • Metallurgical Failure Analysis of Steam Turbine, Compressor, and Hot Gas Expander Components 

      Dowson, David (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      When components fail it is usually unexpected and the root cause is not always known. Downtime from failure can cost a company many thousands of dollars a day depending on the type of equipment. This cost can be magnified ...
    • Modification of Oil Brake on Cryogenic Expander for Improved Efficiency Under Varying Load Conditions 

      Mayne, Trevor; Bowly,Chris (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Investigation into the operation of a 200kW brake oil expander in a 1970’s vintage ethane cracker revealed that maximum gas throughput was significantly below design and that the gas throughput varied significantly in normal ...
    • Molten Urea Transfer Pump Seal Failures 

      Moin, Danish (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Urea melt pumps had been a reliability concern since commissioning (1992). Majority of the concerns were related to the failure of mechanical seal. Unexpected failures of seal were encountered during plant startups or ...
    • 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 ...