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Now showing items 21-30 of 51
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 ...
Cryogenic Fluid Pumping Applications
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Calculating efficiency, power & considerations
Condition monitoring
Cryogenic pump system components
Accessories to cryogenic pump systems
Shaft supports: bushings, bearings
Rotordynamics
Balance requirements ...
Cavitation/NPSH (Field Problems)
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Unexpected cavitation erosion
Key parameters to consider for Root Cause Analysis when experiencing cavitation damage
NPSHR, NPSHA, NPSH margin
Performance loss due to insufficient NPSHA (margin)
NPSH 40,000 hours
...
Pipeline Applications
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Operation (single, series, batch products, parallel)
Maintenance (mechanical seals, bearings, pigging, vibration)
Hydraulic rerates (destaging, volute chipping, volute inserts, impeller underfilling)
Midstream Pipeline Applications – Design Aspects and Considerations for Mechanical Seals
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
There are few applications that place a significant demand on mechanical seals such as those associated with the handling of various fluids through pipelines. Pipeline applications are unique in that they typically encompass ...
Water Hammer and Piping Stresses
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
This tutorial provides guidance to help understand the causes, and to prevent or mitigate the effects of water hammer, or fluid transients, in piping and pipeline systems. The text of this paper is based on early drafts ...
The Theory and Application of True Weighted Efficiency -- A New Metric to Evaluate Pump Energy Efficiency Considering Multiple Operating Conditions
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Energy efficiency is being emphasized more prominently in the pump industry. A consistent method for evaluating pump energy efficiency with multiple operating conditions is needed. New energy efficiency indices have been ...
Best Practices for Cartridge Mechanical Seal Installations
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
The reliability of a mechanical seal depends on more than the design of the seal itself. It also depends heavily on the practices used to install the mechanical seal into the centrifugal pump or other equipment. The actual ...