Pipeline Pumping and Compression Systems: A Practical Approach

Mohitpour, Mo; Botros, K. K.; Hardeveld, Thomas Van

doi:10.1115/1.802786

Cited by 14 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…v) Compressibility of the capacitance system (e.g., vessels, accumulator) attached to the shell side ½V c =B sf dP, where V c is the liquid volume in the capacitance system. If there is a vapour space in this system, V c would be the sum of the actual liquid volume plus an equivalent liquid volume V e to account for the vapour space of volume V sg via the following equation (Mohitpour, Botros, & Van Hardeveld, 2008):…”

Section: Dynamics Of the Shell Sidementioning

confidence: 99%

Dynamic model for a heat exchanger tube rupture discharging a high-pressure flashing liquid into a low-pressure liquid-filled shell

Ennis

Botros

Patel

2011

Journal of Loss Prevention in the Process Industries

View full text Add to dashboard Cite

Section: Dynamics Of the Shell Sidementioning

confidence: 99%

Dynamic model for a heat exchanger tube rupture discharging a high-pressure flashing liquid into a low-pressure liquid-filled shell

Ennis

Botros

Patel

2011

Journal of Loss Prevention in the Process Industries

View full text Add to dashboard Cite

“…These elements are throttle or pressure loss elements, combining and dividing tees, reducers or expanders, capacitance (plenum, volume, vessels), choked and unchoked valves, heat exchangers with a set duty or a set outlet temperature, adiabatic or isothermal flash separators, etc. A full account of the governing equations for these elements is given in [21]. Throttle elements atid capacitance elements are modeled based on quasi-steady state equations describing pressure changes as well as energy and mass balances across the element.…”

Section: Momentummentioning

confidence: 99%

“…The final phase VI is compressor wind down in which small over and under shootings around the recycle system resistance line occur until zero flow and zero head are reached. Note that the recycle system resistant line is not the surge control line [20,21].…”

Section: Introductionmentioning

confidence: 99%

Single Versus Dual Recycle System Dynamics of High Pressure Ratio, Low Inertia Centrifugal Compressor Stations

Botros

2011

Journal of Engineering for Gas Turbines and Power

Self Cite

View full text Add to dashboard Cite

Compression systems are designed and operated in a manner to eliminate or minimize the potential for surge, which is a dynamic instability that is very detrimental to the integrity of the compressor unit. Compressor surge can occur when compressors are subjected to rapid transients such as tho.se occtirring following an emergency shutdown (ESD) or a power failure, which in turn, requires fast reaction. To prevent this from occtirring. compressor stations are designed with single or dual recycle systems with recycle valves, which are required to open upon ESD. There has been extensive debate and confusion as to whether a single recycle or a dual recycle system is required and the circumstances and the conditions under which one system or the other must be used. This paper discusses this crucial design issue in detail and highlights the parameters affecting the decision to employ either system, partictdarly for high pressure ratio, low inertia compressors. Parameters such as gas volume capacitance (V) in the recycle path, compressor power train inertia, compressor performance characteristics, the recycle valve coefficient (Cv). prestroke and stroke time, and check valve dynamic charactetistic are crucial in determining the conditions for dynamic instabilities. A simple analytical methodology based on the perturbation theory is developed that provides a first-cut analysis to determine if a single recycle system is adequate for a given comptession system. The concept of an inertia number is then introduced with a threshold valtte that determines which recycle system to tise. Techniques to circumvent compressor surge following ESD are discussed and their respective effectiveness are highlighted including when and if a delay in theftiel cutoff'will be effective. An example of a case sttidy with actual field data of a high pressure ratio centrifugal compressor employed in a natural gas compressor station is presented to illustrate the fundamental concept of single versus dual recycle systems.

show abstract

“…9 Therefore, pulsation filters must be designed to meet the demand of current compressors. Orifice plate [10][11][12] might be used to attenuate the pulsations in the piping of reciprocating compressor for its simple structure, convenient installation and high performance. However, Broerman et al 8 pointed out that to modern high-speed compressor, using orifice plate for nozzle resonance controlling can dramatically reduce its capacity, and potentially increase pulsations in the lower frequencies.…”

Section: Introductionmentioning

confidence: 99%

Influence of a tapered cylinder nozzle on pressure pulsations in a variable high-speed reciprocating compressor piping system

Liu

Wang

Feng

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part E:

View full text Add to dashboard Cite

This paper investigates the influence of a tapered cylinder nozzle (TCN) on pressure pulsations in a high-speed reciprocating compressor piping system. Numerical methods, the 3D frequency-domain finite element method (FEM) and the 3D time-domain computational fluid dynamics (CFD) were used to separately calculate gas column natural frequencies and pressure pulsations. With favorable agreement between model predictions and experimental data, it is concluded from predictions that an installed TCN changes both the values and distribution of frequencies because installation of a TCN filter can alter gas column structure in the piping system. The order of frequency dominated by cylinder nozzle response increases sharply as the TCN diameter ratio increases and the TCN length to diameter ratio decreases. Pressure fluctuations can be effectively attenuated in piping system under different functioning conditions, e.g. variable compressor speeds and variable discharge pressures.

show abstract

Pipeline Pumping and Compression Systems: A Practical Approach

Cited by 14 publications

References 0 publications

Dynamic model for a heat exchanger tube rupture discharging a high-pressure flashing liquid into a low-pressure liquid-filled shell

Dynamic model for a heat exchanger tube rupture discharging a high-pressure flashing liquid into a low-pressure liquid-filled shell

Single Versus Dual Recycle System Dynamics of High Pressure Ratio, Low Inertia Centrifugal Compressor Stations

Influence of a tapered cylinder nozzle on pressure pulsations in a variable high-speed reciprocating compressor piping system

Contact Info

Product

Resources

About