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Now showing items 51-60 of 115
Case Study on investigation and resolution of Dry Gas Secondary Seal Failure
(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, ...
Improvement of Rotating Equipment Reliability Using Optical Metrology
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Extreme thermal piping displacements were thought to be the root cause for the observed failures at a large refinery, namely 9 mechanical seal failures in 3 months. Optical Metrology methods were used to identify failure ...
Resolution of high vibration on a Generator
(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 ...
NPSHR (NPSH3) Improvement of a Low Pressure Safety Injection Pump
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
This case study discusses the rerate of a set of vertically-mounted single-stage end-suction centrifugal pumps used for low pressure safety injection (LPSI) in a nuclear power plant. The original LPSI pumps were supplied ...
Dry Gas Seal Failure due to Axial Sub-synchronous Vibration on a Hydrogen Recycle Gas Compressor.
(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 ...
Stray Currents and their Damaging Effects on Rotating Machinery
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Stray currents manifest in rotating machinery as a result of specific abnormalities in machines related to flux imbalance, residual magnetism, electrostatic build-up and induced voltages. Discharges of these voltages in ...
Compressor Dry Gas Seal Failure Due To Oil Ingress
(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 ...
A Case Study of Vibration in Positive Displacement Pump Systems
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Positive displacement pump systems can experience high piping vibrations. System vibration can have many root causes- including underdamped fluid pulsations, mechanical resonance, and poor skid design. This case study shows ...
Fugitive Emissions Containment using a Dual Pressurized Seal and API Plan 53B
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Fluids that require limited emissions are often sealed using dual pressurized mechanical seals and sealing systems. API Plan 53B systems use a bladder accumulator to provide the pressure for the barrier fluid to isolate ...
A Review of Aerodynamically Induced Forces Acting on Centrifugal Compressors, and Resulting Vibration Characteristics of Rotors
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
This tutorial reviews the various types of forces that can cause non-synchronous vibrations in centrifugal compressors. Many of these forces are aerodynamically-induced, such as impeller or diffuser stall or impeller / ...