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Frequency Dependence of Piles' Dynamic Stiffness
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
Technical Brief 6: The evaluation of the dynamic behavior of deep foundations for Turbomachinery Modules is not a simple task due to uncertainties in the evaluation of the soil shear modulus and the approximations introduced ...
Control Systems. Molecular Weight Compensation Consideration in Compressor Surge Control
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
Tutorial 10B: The effects of gas molecular weight variation on a centrifugal compressor’s surge line and computation of the operating margin from surge for the purposes of antisurge control is discussed using different ...
Coupled Torsional and Lateral Analysis for the Determination of the Damping of the First Torsional Mode of Synchronous Motor Driven Compressor Trains
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
Lecture 13: This paper deals with the damping ratio D (modal damping) of the 1st torsional mode of synchronous motor driven compressor trains. The damping ratio is a crucial parameter for the torsional start-up analysis ...
A Solution to Years of High Vibration Problems in Three Reinjection Compressor Trains Running at 33 MPA Discharge Pressure
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
Case Study 22: Over a 13‐year span, a major South American oil company’s maintenance department fought high vibrations in three gas reinjection compressor trains. To reduce the chances of machine trips, technicians field ...
Hydraulic Power Recovery Turbine Operational Failure and Design Enhancement
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
Case Study 23: PTT operate a number of hydraulic power recovery turbines (HPRT) in their gas processing plants in Rayong Thailand. One of the newest plants incorporates some of the largest such turbines ever produced. The ...
Measurements and Analysis of High Machine Vibration - A case Study of Screw Compressor Rub
(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. ...
Considerations in the Design of VFD Motor-Driven Compressors
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
Tutorial 17: The various drivers for process compressor trains are designed in accordance with the pertinent process requirements. In the case of variable speed applications for process compressors, Steam turbines or Gas ...
Using Non-Standard Materials for Couplings on Special Turbomachinery Applications
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
Technical Brief 3: Flexible couplings are a critical component in turbo-machinery train. It is a challenge and very important for coupling designers to select suitable materials for special turbo-machinery applications. ...
Dynamic Analysis of a Multi-Stage Compressor Train
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
Technical Brief 4: A complex multiple-stage compressor train which is part of an off-shore booster installation was facing process and mechanical related problems. The frequency of these problems has increased lately leading ...
Repair of Severely Damaged Rotor as an Emergency Spare
(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 ...