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Vortex Flow Technology. Corporate Brand.

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Presentation Transcript
corporate brand
Corporate Brand

The acute angle and sharp straight edges of the top half of the diamond symbol represent Yokogawa’s cutting-edge technology while the gentle curvature of the bottom half represents the warm-hearted nature of Yokogawa’s people. By balancing these two elements, Yokogawa aims to contribute toward the realization of a thriving global society in much the same way as the sun. This property is reflected in the bright yellow of the diamond.

– Corporate trademark since October 1986

history of yewflo vortex
History of YEWFLO Vortex

1969

Yokogawa designs

first Vortex meter

1995

Mass YEWFLO

introduced

1982

Dual piezoelectric

sensor

1988

10,000 units

installed (USA)

1990

YEWFLO 100%

American made

2002

Digital YEWFLO

1979

First industrial

YEWFLO released

1987

First 0.5 inch

Vortex flowmeter

1989

First “Smart”

Vortex flowmeter

1993

Microprocessor

-based

“SMART” flowmeter

slide4

Product Line-Up

Dual Sensor Designs

High-Purity Design

  • Semi-conductor and
  • biotech industries
  • Electropolished
  • 7-15Ra finish
  • Redundant sensors for
  • critical applications

High Pressure Design

  • 1500# & 2500# flange
  • ratings
slide5

Principle of Operation

The analogy of a golf ball moving through the air is useful in describing vortex formation:

A slow moving putt barely displaces

the molecules of air

The higher velocity of a chip shot causes irregular eddies to form behind the ball

The velocity associated with a drive is

sufficient to cause a strong, regular

vortex formation behind the ball

slide6

Mountain Top

Vortices

Principle of Operation

Vortex formation in clouds blown by a mountain top is an example from nature of the vortex phenomenon

slide7

Principle of Operation

Light breeze - Laminar flow,

no vortices formed

NR = 0-5000

Stiff breeze - Transition flow,

irregular vortex formation

NR = 5000-20000

Strong wind - Turbulent flow,

regular vortex pattern

NR = >20000

principle of operation
Principle of Operation

When a flowing medium strikes a non-streamlined bluff object,

it separates, moves around the object and passes downstream.

At the point of contact with the object, vortex swirls separate from the

body on alternating sides. This separation causes a local increase

in pressure and a decrease in velocity on one side and a decrease

in pressure and an increase in velocity on the opposite side. The

alternating velocities generate alternating pressure forces on either side

of the bluff body. The frequency of these pressure changes is

proportional to velocity.

typical vortex sensors
Typical Vortex Sensors

Thermistor

Differential Switched Capacitor

Integral Diaphragm

YEWFLO Shedder Bar

slide10

Unique Sensor Design

How Does It Work?

Flow

Flow hits the shedder bar, separates and due to the shape of the bar, forms vortices. The vortices create an alternating pressure differential across the bar. The bar is physically stressed toward the low pressure side of the bar.

A piezoelectric crystal converts a mechanical stress into an electrical pulse. The crystals are hermetically sealed and not in contact with the process.

Crystal A

Crystal B

L

H

Force

slide11

Principle of Operation

The Karman vortex frequency “f” is proportional to the velocity ”v”. Therefore, it is possible to obtain the flow rate by measuring the Karman vortex frequency:

f = St (v/d)

where: f = Karman vortex frequency

St = Strouhal number (constant)

v = Velocity

d = Width of vortex shedder (constant)

what is strouhal number

l

What is Strouhal Number?
  • The Strouhal number is the ratio between the vortex interval and the shedder bar width
  • Usually the vortex interval (l) is about 6 times the shedder bar width (d), while the Strouhal number is the reciprocal value (~0.17)
  • When the Strouhal number is fixed, the velocity can be measured by counting the number of vortices
slide13

Sensor Assembly

POTTING COMPOUND

“O” RING SEAL

CAP ASSEMBLY

HERMETIC SEAL

METAL TUBE

INSULATOR (SHRINK TUBING)

METAL DISC

PIEZOELECTRIC CRYSTALS

CERAMIC PLATE

METAL PLATE

SOLID METAL SHEDDER BAR

slide14

Unique Sensor Design

“O” Ring Seal

Metal Tube

  • No thin

diaphragms

to damage

  • No ports to plug
  • MTBF in excess of

250 years

Piezoelectric Crystals

Metal Plate

Metal Disc

Ceramic Plate

Solid Metal Shedder Bar

field proven mechanical construction

Indicator/Totalizer

Local Interface

  • Amplifier
  • Remote available
  • Gasket
  • High Reliability

Hermetically Sealed

Sensor

  • Body
  • Full ANSI rating
  • Shedder Bar
  • Solid metal
  • Rugged construction
  • No moving parts
Field Proven Mechanical Construction
why are more users applying vortex
Why are more users applying Vortex?
  • Vortex Simplifies Installation & Reduces Costs
  • Improved Reliability
    • No Impulse Lines to Plug, Freeze, or Leak
    • Reduced potential leak points
  • Reduced Cost
    • In-line device is cost-effective in smaller lines
    • Reduced maintenance: No impulse lines, No Periodic Calibrations Required
  • Can be applied in most applications where DP-Orifice has traditionally been used
    • 2-wire Device
    • Applicable to Liquid, Gases and Steam
    • Wide Temperature Range to 842 F (450 C)
vortex flowmeter benefits
Vortex Flowmeter Benefits
  • Digital flow signal
    • No zero drift
    • Pulse output for totalizing
  • Low installed cost
  • Wide rangeability
  • Inherently Linear output
  • Low pressure drop
  • Liquid, steam, or gas applications
  • Immune to density & viscosity changes
vortex performance benefits
Vortex Performance Benefits
  • High Accuracy

+/- 0.75% of reading (liquid)

+/- 1% of reading (gas, steam)

  • Automatic Gas Expansion Factor Correction
    • dramatically improves accuracy
  • Temperature Compensation
    • eliminates ambient temperature effects on the analog output
  • Turn Down
    • as high as 20:1 provides accurate control over wider process conditions
slide19

SSP

~Spectral Signal Processing

  • Featuring YOKOGAWA’s new, proprietary digital signal processing technique
  • No start-up tuning
  • Advanced self-diagnostics
  • Parameter settings made simple
  • Compact design
  • Clear, two-line display
adaptive noise suppression ans
Adaptive Noise Suppression (ANS)
  • ANS takes advantage of Yokogawa’s unique dual sensor design
  • By individually analyzing the signal from each sensor ANS can deduce which portion of the signal is flow and which portion is noise.
  • Improves signal to noise ratio
  • Continuously analyzes the incoming signals and adapts to changing noise conditions

N1

S1

S2

N2

Polarization

Direction

S

N

Lift

Direction

Bending moment of shedder bar in lift force direction

slide21

Time

SUB6

SUB5

SUB4

SUB3

Gain

SUB2

SUB1

Frequency

Sensitivity Curve

Vortex Signal

Noise

Amplitude

Frequency (log)

SB6

SB5

SB4

SB3

SB2

SB1

Gain

[Separation by SAF]

Frequency

Time

~ Spectral Signal Processing

SSP

Noisy

Vortex

Signal

The signal is split into individual sub-bands like the frequency spectrum display of an audio graphic equalizer. The band splitting filter also applies intelligent attenuation to linearize the amplitude vs. velocity charac-

teristic. Based on application information such as liquid or gas, flow span and density a predicted amplitude/sensitivity curve is computed. The results of the individual sub-band analyses are

compared to the predicted sensitivity curve. Finally a tight band pass filter is focused around the vortex flow signal.

Frequency

Analyzing/

Intelligent

Amplification

Spectrum

Analyzing

Spectral

Adaptive

Filtering (SAF)

Output

Waveform

slide22

Signal Processing Circuitry

Piezo-ceramics

A/D

CHARGE

SPECTRUM

CONVERTER

CONVERTER

ANALYZER 1

Output

CPU

Circuit

CHARGE

SPECTRUM

A/D

CONVERTER

ANALYZER 2

CONVERTER

Noise Ratio Setting

Counter

Schmitt

Summer

BPF

Trigger

B

SPECTRUM

A

ANALYZER 3

GATE ARRAY

In digitalYEWFLO the signal processing circuitry is fully digitized. This permits signal

processing which had been previously performed by analog circuits (such as an adder,

Schmitt trigger, and filter) to be incorporated into a gate array, resulting in reduced parts

and a downsizing of the converter.

effect of vibration
Effect of Vibration

Fluid: Water

Size: 50mm

Setting: Default

Span: 15 m3/h (2 m/s)

Vibration: 1G

low flow response
Low Flow Response

Fluid: Water Size: 50mm Setting: Default

simplified parameter settings
Simplified Parameter Settings
  • Frequently-used parameters grouped together in a quick access format decreases commissioning time.
new compact amplifier housing
New Compact Amplifier Housing
  • Smaller than Yewflo*E-30%
  • Fewer parts for improved reliability

(volume reduction)

slide27

Features & Functions Summary

  • No start-up tuning
  • Automatically selects the optimum settings - even in noisy environments
  • Low flow stability
    • Accurately senses vortices at low flow rate for stable, accurate flow measurement
  • Backward compatible
    • The SSP amplifier can be retrofitted to provide the best vortex flow measurement
    • available today
  • Advanced self-diagnostics
    • Provides diagnostic messages on high vibration environments, excessive flow
    • fluctuations, and clogging or plugging in the area around the shedder bar. Analysis
    • of the process allows true condition-based maintenance
  • Simplified parameter settings
    • Frequently used parameters grouped together in a quick-access format decreases
    • commissioning time
slide28

Features & Functions Summary

  • Clear, parallel two line LCD display
    • Displays simultaneous flow rate and total along with process diagnosis
  • Configurable through display interface (MMI)
  • New compact amplifier housing
    • Lighter, small and easier to handle design with increased reliability and performance
  • Simultaneous analog and pulse outputs
  • Status output (flow switch function) or alarm output
  • BRAIN, HART and FF communications
  • Wide process temperature range
    • High temperature option to 842 deg. F (450 deg. C)
  • High accuracy
    • +/- 0.75% of reading (liquid)
    • +/- 1% of reading (gas, steam)
digitalyewflo multi variable mass vortex flowmeter
digitalYEWFLOMulti-variable Mass Vortex Flowmeter
  • Provides simultaneous outputs for temperature monitoring and mass flow measurement
  • Computes mass flow rate in real time based on the measured temperature
  • Displays mass flow rate and temperature on two line LCD indicator
digitalyewflo multi variable mass vortex flowmeter31
digitalYEWFLOMulti-variable Mass Vortex Flowmeter
  • Decreases the need for temperature monitoring loops and thus simplifies instrumentation
    • Reduced openings on process pipes for inserting thermowells, that can potentially cause leakage, will slash instrumentation costs and increase the safety of the process lines
  • Temperature indication allows flow conditions to be monitored
    • The self diagnostics related to the RTD provides checks for an out of range temperature output or abnormal temperature and so provides a window into the process

RTD embedded in

shedder bar

slide32

Multi-variable Option ~ Flow & Temperature

Built-in temp sensor

  • Protected in shedder bar
  • +/- 1 deg C (liquid), +/- 2 deg C (gas/steam); RTD Pt 1K ohm

Multi-variable option

  • Flow & temperature values displayed
  • Dual output (flow: pulse, temp: 4-20)

Steam mass flowrate calculation

  • Mass flowrate calculated using steam table and measured temperature (fixed pressure)
  • +/- 2% of rate accuracy

Piezo sensors

Shedder bar

RTD sensor

installation considerations general
Installation ConsiderationsGeneral
  • Pipe orientation
    • Ensure that pipe stays full
  • Meter orientation
    • Can be mounted in any direction
  • Materials of construction
    • Ensure that material is compatible with process fluid
  • Heat of Process
    • Ensure proper meter selection for process temperature
successful vortex applications
Successful Vortex Applications
  • Proper Vortex Sizing
    • Process conditions
  • Piping requirements
  • Full pipe
proper piping requirements

Gas

Proper Piping Requirements
  • Attitude insensitive
  • Full pipe required
  • Good alignment of piping
  • Concentric Reducers if required
proper gasket selection and installation
Proper gasket selection and installation

Correct I.D. required

Self Centering (Recommended)

Proper material

Problems occur if... gasket is too

small,gasket is deformed, has shifted

position, or if the mating pipe connection is

misaligned.`

slide40

Reliable Flow Measurement Solution

Vortex has come a long way over the year.

Use Vortex as another flow measurement solution. It really does Work!