Improved Design of a Multi-Stage Continuous-Resistance Trim for minimum Energy Loss in Control Valves

Taimoor Asim, Antonio Oliveira, Matthew Charlton, Rakesh Mishra

Research output: Contribution to journalArticle

Abstract

Control valves used in energy systems are often integrated with trims having well designed flow paths to regulate fluid flow. These trims, known as multi-stage continuous-resistance trims, comprise of staggered arrangement of circular cylinders enabling pressure drop reduction in controlled stages. The trim design process currently used doesn’t ensure good local flow characteristics and relies almost entirely on the global performance indicators. The existing design largely ignores the effects of geometrical features of the trim, resulting in severe performance issues locally. In the present investigation, unique geometry-dependant local flow parameters have been analysed, using Computational Fluid Dynamics, and integrated with the global performance indicators to develop an improved trim design. Novel geometry and flow based parameters have been developed that uniquely relate the local flow behaviour within the trims to their corresponding geometrical parameters. It has been observed that the change in geometrical parameters of the trim significantly affects trim’s performance, for example, reduction in the cylinders’ dimensions, under same operating conditions, reduces the normalised pressure drop, flow velocity and energy by 28.4%, 26.8% and 37.9% respectively. The work highlights the need for modification in existing trim design methodology.
LanguageEnglish
Pages954-971
Number of pages18
JournalEnergy
Volume174
Early online date9 Mar 2019
DOIs
Publication statusPublished - 1 May 2019

Fingerprint

Energy dissipation
Pressure drop
Geometry
Circular cylinders
Flow velocity
Flow of fluids
Computational fluid dynamics

Cite this

Asim, Taimoor ; Oliveira, Antonio ; Charlton, Matthew ; Mishra, Rakesh. / Improved Design of a Multi-Stage Continuous-Resistance Trim for minimum Energy Loss in Control Valves. In: Energy. 2019 ; Vol. 174. pp. 954-971.
@article{1e8c90e153934dffa669ef2e87e05813,
title = "Improved Design of a Multi-Stage Continuous-Resistance Trim for minimum Energy Loss in Control Valves",
abstract = "Control valves used in energy systems are often integrated with trims having well designed flow paths to regulate fluid flow. These trims, known as multi-stage continuous-resistance trims, comprise of staggered arrangement of circular cylinders enabling pressure drop reduction in controlled stages. The trim design process currently used doesn’t ensure good local flow characteristics and relies almost entirely on the global performance indicators. The existing design largely ignores the effects of geometrical features of the trim, resulting in severe performance issues locally. In the present investigation, unique geometry-dependant local flow parameters have been analysed, using Computational Fluid Dynamics, and integrated with the global performance indicators to develop an improved trim design. Novel geometry and flow based parameters have been developed that uniquely relate the local flow behaviour within the trims to their corresponding geometrical parameters. It has been observed that the change in geometrical parameters of the trim significantly affects trim’s performance, for example, reduction in the cylinders’ dimensions, under same operating conditions, reduces the normalised pressure drop, flow velocity and energy by 28.4{\%}, 26.8{\%} and 37.9{\%} respectively. The work highlights the need for modification in existing trim design methodology.",
keywords = "Control Valves, Computational Fluid Dynamics, Continuous-Resistance Trims, Local flow behaviour, Pressure drop",
author = "Taimoor Asim and Antonio Oliveira and Matthew Charlton and Rakesh Mishra",
year = "2019",
month = "5",
day = "1",
doi = "10.1016/j.energy.2019.03.041",
language = "English",
volume = "174",
pages = "954--971",
journal = "Energy",
issn = "0360-5442",
publisher = "Elsevier",

}

Improved Design of a Multi-Stage Continuous-Resistance Trim for minimum Energy Loss in Control Valves. / Asim, Taimoor; Oliveira, Antonio; Charlton, Matthew; Mishra, Rakesh.

In: Energy, Vol. 174, 01.05.2019, p. 954-971.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Improved Design of a Multi-Stage Continuous-Resistance Trim for minimum Energy Loss in Control Valves

AU - Asim, Taimoor

AU - Oliveira, Antonio

AU - Charlton, Matthew

AU - Mishra, Rakesh

PY - 2019/5/1

Y1 - 2019/5/1

N2 - Control valves used in energy systems are often integrated with trims having well designed flow paths to regulate fluid flow. These trims, known as multi-stage continuous-resistance trims, comprise of staggered arrangement of circular cylinders enabling pressure drop reduction in controlled stages. The trim design process currently used doesn’t ensure good local flow characteristics and relies almost entirely on the global performance indicators. The existing design largely ignores the effects of geometrical features of the trim, resulting in severe performance issues locally. In the present investigation, unique geometry-dependant local flow parameters have been analysed, using Computational Fluid Dynamics, and integrated with the global performance indicators to develop an improved trim design. Novel geometry and flow based parameters have been developed that uniquely relate the local flow behaviour within the trims to their corresponding geometrical parameters. It has been observed that the change in geometrical parameters of the trim significantly affects trim’s performance, for example, reduction in the cylinders’ dimensions, under same operating conditions, reduces the normalised pressure drop, flow velocity and energy by 28.4%, 26.8% and 37.9% respectively. The work highlights the need for modification in existing trim design methodology.

AB - Control valves used in energy systems are often integrated with trims having well designed flow paths to regulate fluid flow. These trims, known as multi-stage continuous-resistance trims, comprise of staggered arrangement of circular cylinders enabling pressure drop reduction in controlled stages. The trim design process currently used doesn’t ensure good local flow characteristics and relies almost entirely on the global performance indicators. The existing design largely ignores the effects of geometrical features of the trim, resulting in severe performance issues locally. In the present investigation, unique geometry-dependant local flow parameters have been analysed, using Computational Fluid Dynamics, and integrated with the global performance indicators to develop an improved trim design. Novel geometry and flow based parameters have been developed that uniquely relate the local flow behaviour within the trims to their corresponding geometrical parameters. It has been observed that the change in geometrical parameters of the trim significantly affects trim’s performance, for example, reduction in the cylinders’ dimensions, under same operating conditions, reduces the normalised pressure drop, flow velocity and energy by 28.4%, 26.8% and 37.9% respectively. The work highlights the need for modification in existing trim design methodology.

KW - Control Valves

KW - Computational Fluid Dynamics

KW - Continuous-Resistance Trims

KW - Local flow behaviour

KW - Pressure drop

U2 - 10.1016/j.energy.2019.03.041

DO - 10.1016/j.energy.2019.03.041

M3 - Article

VL - 174

SP - 954

EP - 971

JO - Energy

T2 - Energy

JF - Energy

SN - 0360-5442

ER -