vortex technology and applications
TRANSCRIPT
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Where Flow Measurement Meets Innovation…
Vortex Technology and Applications
SLT Corporation
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Where Flow Measurement Meets Innovation…
Presentation Overview
• History of Vortex Shedding Technology
• Vortex Shedding is all around you
• Vortex Shedding in measurement
• Understanding your Applications
• Knowing your options
• Using the sizing software
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Where Flow Measurement Meets Innovation…
History of Vortex Shedding Technology
• Da Vinci observed vortex shedding in 1516
• Von Karman provided an empirically determined
formula for it in 1911-1912.
• Allen Rodely & Charlie McMurtry developed this
technology working at Eastech Corp. in the
early 1970’s.
F = v/d x Sf D = shredder bar width
F = vortex frequency
V = inlet velocity,
Sf = Strouhal factor, constant over wide Reynolds # in the measuring range
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Where Flow Measurement Meets Innovation…
Vortex Shedding is all around you !
• Flags waving
• Road signs shaking in high winds
• Cloud formations over large land masses
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Where Flow Measurement Meets Innovation…
Vortex Shedding is all around you !
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Where Flow Measurement Meets Innovation…
Vortex Shedding in Flow Measurement
• Bluff body induces low pressure pulses (vortices) on
opposite sides
• Piezo electric crystals located on the opposite side of bluff
body to convert pulses into voltage signals
• Voltage signal (pressure pulse) is directly proportional to
volumetric flow rate
• Sensors NEVER come into contact with the fluid
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Where Flow Measurement Meets Innovation…
Vortex Shedding in Flow Measurement
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Where Flow Measurement Meets Innovation…
Vortex Shedding in Flow Measurement
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Where Flow Measurement Meets Innovation…
Dual Piezo Technology
One sensor picks up one signal +
noise.
Two sensors pick up two vortex
signals, 180° out of phase + two
noise signals 180° in phase.
Out of phase signal is amplified,
in phase signal is not.
TWO PIEZO ELECTRIC SENSORS
(Behind Stainless Steel Wall)
A
B
Time
B
Time
A
C
180° out of phase
Electronics Filtering
Vortex Shedding in Flow Measurement
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Where Flow Measurement Meets Innovation…
• Measure Steam, Gas and Liquids
• No moving parts
• No leak paths to sensors or electronics
• Wide turndown
• True linear meter
• Accurate for custody transfer
• Unlimited line size
• Hot tap option
Technical Advantages
Vortex Shedding in Flow Measurement
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Where Flow Measurement Meets Innovation…
• Reynolds number less
than 10000
• High viscosity liquids
• Not recommended for
batch control
Technical Limitations
Vortex Shedding in Flow Measurement
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Where Flow Measurement Meets Innovation…
Standard Piping Requirements
Understanding your Applications
Straight Run Piping Requirements Upstream Downstream
One 90º elbow before the meter 10 D 5 D
Two 90º elbows before the meter 15 D 5 D
Two 90º elbows out of plane
before the meter
30 D 5 D
Reduction before the meter 10 D 5 D
Regulator or Valve partially closed
before the meter
30 D 5 D
D is equal to the internal diameter of the pipe.
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Where Flow Measurement Meets Innovation…
Benefits for Liquids
Understanding your Applications
• No Moving Parts
• 30 to 1 turndown in most liquids
• Liquids with suspended particals
– Sand, dirt, dust, salt, grains, seeds ect
• Great for Conductive & Non-conductive
Considerations for Liquids
• Non-compressible fluid can have pressure
pulsations. Must be away from pumps.
• Piping requirements
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Where Flow Measurement Meets Innovation…
Benefits for Gases
Understanding your Applications
• Wet or Dry Gases
• Meter accuracy is forever constant
• Frequency will not change with density
• Meters will never need recalibration
Considerations for Gases
• Piping requirements
• Min & Max Flow Ranges
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Where Flow Measurement Meets Innovation…
Benefits for Steam
Understanding your Applications
• Solid Stainless Steel Construction
• Water Slugs will not damage meter
• Meter is .25% repeatable for application adjusting
• No internal o-rings, seals or gaskets to replace or service.
• A completely maintenance free steam flow meter
• Meters will never need recalibration
Considerations for Steam
• Piping requirements
• Min & Max Flow Ranges
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Where Flow Measurement Meets Innovation…
NEW Meter Tagging and Application
Identification
• Each new meter will come equipped with its own
identification tag.
• This tag will show important information about the model of
the vortex flow meter, the application serial number, and the
meter’s flow range.
• All installation manuals will also have a duplicate tag
located on the front cover of each manual.
• End user immediately identify the matching installation
manual with the corresponding vortex flow meter.
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Where Flow Measurement Meets Innovation…
LPIV Low Profile Insertion Vortex
• Solid Stainless Steel Construction
• Electron Beam Welded
• Holding Nut & Alignment Pin
• Alignment Mounting Assembly
• Explosion Proof Enclosure
• Weather Proof Multi Pole Connector
• Microtel Smart TX
• Quick and easy installation
• Line sizes 2” – 24” (50mm – 600mm)
• Comes standard with all mounting hardware
Knowing your options
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Where Flow Measurement Meets Innovation…
Lines from 50 mm – 600 mm
Gas/steam to 75 meter/sec
Liquids 0.4 to 9 meter/sec
Alignment Pin
FM approved
To up to 340 oC
Pressure up to 210 Barg
Acc. +/- 1% Reading
Rep. +/- 0.25% Reading
Knowing your options
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Where Flow Measurement Meets Innovation…
Knowing your options
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Where Flow Measurement Meets Innovation…
• Solid Stainless Steel Construction
• Electron Beam Welded
• Removable Insertion Tool
• Explosion Proof Enclosure
• Weather Proof Multi Pole Connector
• Microtel Smart TX
• Alignment Arrow
• Quick and easy installation
• Line sizes 2” – 48” (50mm – 1200mm)
• Valve, Flange or NPT Connections
Knowing your options
HTIV Hot Tap Insertion Vortex
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Where Flow Measurement Meets Innovation…
Knowing your options
Lines from 50 mm – 1200 mm
Gas/steam to 75 meter/sec
Liquids 0.4 to 9 meter/sec
Hot Tap Option
Removable Tool
FM approved
To up to 340 oC
Pressure up to 210 Barg
Acc. +/- 1% Reading
Rep. +/- 0.25% Reading
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Where Flow Measurement Meets Innovation…
Knowing your options
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Where Flow Measurement Meets Innovation…
• Solid Stainless Steel Construction
• No O-Rings, Seals or Gaskets !!!
• No Leak Paths
• Machine Radius Enhance Signal Quality
• Slim Profile Meter Body
• Reduced Internals for LOW-FLOW Options
• Measures 2-3 Times Lower Flow
• Weather Proof Multi Pole Connector
• Microtel Smart TX
• Line sizes ¾” – 12” (18mm – 300mm)
Knowing your options
VP & FVP Vortex Plate and Flanged Vortex Plate
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Where Flow Measurement Meets Innovation…
Sizes 3/4 to 12 Inches
Gas/steam to 75 m/s
Liquids 0.4 to 9 m/s
FM approved
Flanges available
Low Flow Applications
Acc. +/- 0.5% Reading
Rep. +/- 0.25% Reading
Vortex Plate
Flanged Vortex Plate
Knowing your options
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Where Flow Measurement Meets Innovation…
Knowing your options
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Where Flow Measurement Meets Innovation…
Lines from 50 mm – 600 mm
Gas/steam to 75 meter/sec
Liquids 0.4 to 9 meter/sec
Alignment Pin
FM approved
To up to 340 oC
Pressure up to 210 Barg
Acc. +/- 1% Reading
Rep. +/- 0.25% Reading
Knowing your options
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Where Flow Measurement Meets Innovation…
New Extreme Pressure Flanged Vortex Pl
ate Model
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Where Flow Measurement Meets Innovation…
API Flange & Right Gasket
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Where Flow Measurement Meets Innovation…
Application
• American Petroleum Institute
Flanges (API) for extreme pressure,
• Special for an oil company in their oil
wells & For extreme pressure between
3500 psig – 4000 psig.
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Where Flow Measurement Meets Innovation…
Up Coming
New Products
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Where Flow Measurement Meets Innovation…
Microtel MASS MTX pressure and temp di
splay
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Where Flow Measurement Meets Innovation…
Microtel MASS MTX total and rate dis
play
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Where Flow Measurement Meets Innovation…
Tools of the Trade
Nice Instrumentation Sizing Program •Quick results
• English & Metric
• Steam, Gas & Liquids
• All Meter Types
• All Schedule Types
• Line sizes 1 – 48”
• Precise Customer
Sizing Information
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Where Flow Measurement Meets Innovation…
THANK YOU !
SLT Corporation
Representative
SKn Tecknopark Biz#508 Sangdwon 1dong,
Jungwon-gu, Seongnam-city, Gyeonggi-do, korea
Tel. +82-31-776-4300 / Fax +82-31-776-4303