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Now showing items 71-80 of 157
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 ...
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 ...
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 ...
Turbomachinery Control Valves Sizing and Selection
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Turbomachinery Controls dedicated to centrifugal and
axial compressors use several types of control valves, such as:
-Antisurge (recycle) valve
-Suction throttle valve
-Hot-gas bypass valve
-Quench control valve
As the ...
Conversion of a Horizontal Split Centrifugal Compressor with a Closed Impeller to an Open Face Impeller with a One Piece Diaphragm
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
A 1970 vintage polyethylene plant faced a market driven requirement to improve its
polyethylene grade.
The improved, new grade required a new highly reactive catalyst and needed to be ready for
customer’s product trial in ...
The Selection and Design of Dual Pressurized Liquid Sealing Systems
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Dual mechanical seals represent one of the most common approaches to improving seal reliability and reducing process emissions. While the presence of the pressurized barrier fluid provides significant benefits, the challenge ...
Overview of Turbomachinery for Super-Critical CO2 Applications
(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 ...
Advancements in Mechanical Sealing - API 682 Fourth Edition
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
API 682 is the leading document for mechanical seals in petrochemical, chemical, and pipeline services worldwide. It has combined the aspects of seal design, testing, standardization, and applications to provide the users ...
Investigating & Improving the Drooping Curve of A Two-Stage Feed Pump
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
A two-stage between-bearing pump of the upgraded material was supplied to replace the existing machine. The pump utilized a higher number of impeller blades to obtain higher efficiency at its design point, but exhibited a ...