prowirl - endress+hauser · pdf file24/03/2013 . the two sensors for prowirl 72 and 73...
TRANSCRIPT
24/03/2013
Products Solutions Services
Vortex
Prowirl
Slide 1 SW Lim
24/03/2013
Vortex Applications
Vortex - Prowirl
Steam
Liquids
Gases
Slide 2 SW Lim
24/03/2013
Vortex Measuring Principle
Vortex - Prowirl
Slide 3 SW Lim
24/03/2013
All you need for vortex measurement
f = Vortex frequency
V = Volume flow
f ~ V
Bluff Body DSC Sensor
Transmitter
Vortex - Prowirl
Slide 4 SW Lim
24/03/2013
Differential Switched Capacitor Sensor
Vortex - Prowirl
Counter Electrode & Paddle have the same mass = perfectly balanced system = immune against vibrations
Laser welding not in touch with process = no corrosion
Trigger Level
Sign
al A
mpl
itude
The movement of the paddle generates sinusidal voltage change between Electrode 1 and 2
Electrode 2 Electrode 1
Slide 5 SW Lim
24/03/2013
Stable Strouhal Number = Excellent Performance
•The E+H bluff body guarantees a stable Strouhal number over Re 20’000 •The range from Re 4’000 to 20’000 should be avoided when sizing
Vortex - Prowirl
0.75% o.f.s 0.75% o.r.
Slide 6 SW Lim
24/03/2013
Measuring Range of a Vortex Flowmeter
1. Low flow limitation – Reynolds number • Vortex performs best at Re> 20,000 • Increase of viscosity due to low process temperature lower Re number • Small flow velocity lower Re number
2. Low flow limitation – density/velocity • Higher density and velocity creates stronger signal
Vortex - Prowirl
Slide 7 SW Lim
24/03/2013
Effects of build-up and abrasion
Radius because of abrasion
has no effect
Build-up has no effect
If no corrosion and operating at velocity's that could cause erosion (>50m/sec for abrasive gases) then the meter calibration is for life!!! Amplifier or Sensor changes do not influence the performance! *** Life-Time-Calibration ***
Vortex - Prowirl
Slide 8 SW Lim
24/03/2013
Vibration Immunity
Vortex - Prowirl
20 40 60 80 100 120 140 160 180 200 300 400 500
4
3.5
3 2.5
2
1.5
1
0.5
0
Z-Axis Y-Axis
X-Axis
X-Axis Z-Axis Y-Axis
Test proves vibration immunity: exceeds1g in all axes from 20 to 500 Hz
Acc
eler
atio
n (g
)
Frequency (Hz)
Slide 9 SW Lim
24/03/2013
High Resistance to Water Hammer
Puddle of water is shot against the meter if the rupture disc bursts due to high pressure
• Water hammer simulator at University of Karlsruhe
• Tested with water slugs up to 100m/s (>350 km/h)
• No effect on sensor performance or calibration
Vortex - Prowirl
Slide 10 SW Lim
24/03/2013
Vortex Temperature Shock Test
• Heating sensor to +400ºC
• Shock cooling in water +25ºC
• 3X reheating to +400ºC and shock cooling in liquid nitrogen -196ºC
Vortex - Prowirl
Slide 11 SW Lim
24/03/2013
Vortex Temperature Shock Test
Vortex - Prowirl
Slide 12 SW Lim
24/03/2013
Vortex- For liquids, gases and steam
Vortex - Prowirl
Promass 72 Volume Flow Measurement
Promass 73 • Temperature Measurement • Mass Flow Calculation
Prowirl • Measuring accuracy :±0.75% o.r. (liquid) ±1.00% o.r. (gas) • Process temperature: -200 to +400ºC • Process pressure up to 250 bar • Flanged version: DN 15 to 300 (1/2” to 12”) • Wafer version: DN 15 to 150 (1/2” to 6”) • Nominal Diameter Reduction version saves cost and add flexibility • Dualsens: single body meter with two transmitter for redundancy
measurement
Slide 13 SW Lim
24/03/2013
The two sensors for Prowirl 72 and 73
• Prowirl 72 comes with the reliable and proven paddle sensor for volumetric flow measurement
• Prowirl 73 also has additionally
an integrated temperature sensor (PT1000) for mass flow calculations of: • liquids • Saturated steam • gases at constant pressure
The same type of sensor is used for all meter sizes means cost reduction of spare part handling
Vortex - Prowirl
Slide 14 SW Lim
24/03/2013
Common Vortex Installation
About 70% of all vortex installations require a reduction of line size, including:
1. reducer 2. min. 15 DN straight run (inlet) 3. Vortex 4. min. 5 DN straight run (outlet) 5. expander
1. 2. 3. 4. 5.
Vortex - Prowirl
Slide 15 SW Lim
24/03/2013
All of this is replaced now – by one flow meter! with the same specifications…
Vortex - Prowirl
Prowirl F sensor DN100/4” standard
Prowirl F sensor DN100/4” R Style reduced by one line size to DN80/3”
Prowirl F sensor DN100/4” S Style super reduced by two line sizes to DN50/2”
DN100
DN100 to DN80
DN100 to DN50
Slide 16 SW Lim
24/03/2013
Prowirl F, FR, FS “Dualsens”
• The Dualsens model has one single meter body with only one bluff body but two individual sensors and transmitters
• The model is used in applications where
redundancy of a measuring point is required • When a plant/process can’t be shut
down in case of a failure (e.g. boiler mains)
• When a critical process variable needs crosschecking with a second value
Vortex - Prowirl
Slide 17 SW Lim
24/03/2013
Steam Measurement with Prowirl
• Because of the technological advantages of Prowirl most of its applications can be found in steam metering
• About half of all Prowirl are installed in steam applications • Temperature shocks and water hammer at startup require an extremely
robust flow meter such as Prowirl • The Prowirl measures the volumetric flowrate of steam accurate and
independently of process conditions • The Prowirl 73 can additionally compute the massflow of saturated steam
Vortex - Prowirl
Slide 18 SW Lim
24/03/2013
Vortex - Prowirl
What type of steam is measured? 1. Saturated steam >85% of Vortex steam applications
• In most industries used for heating and to be added to processes • Density is defined by either pressure OR temperature • Process conditions usually 4…15 bar /145…200°C • Saturated steam sometimes becomes slightly overheated. This leads to
small errors if not considered
2. Superheated steam Normally measured with a Dp solution • Used for high energy flow i.e. power generation • To define density pressure AND temperature is needed • Process conditions often >300°C and pressure >80 bar
3. Wet steam • Not commonly used in process industries • Difficult or impossible to measure because of likely 2nd phase flow • Prowirl is able to measure steam qualities better 95% (vol.)
Slide 19 SW Lim
24/03/2013
Vortex Solutions for Steam Mass Flow
Prowirl 72 Constant Process
Conditions
Prowirl 73 Sat. Steam Measurement
with Integrated T-Measurement
Price
Func
tiona
lity
Prowirl 72 + RMS + p-Sensor + T-Sensor
Superheated Steam
Prowirl 73 with HART Input
Superheated Steam
Vortex - Prowirl
Slide 20 SW Lim
24/03/2013
Limitations in Vortex Steam Applications
1. Nominal Bore • In power generation and very large main line after the boiler sizes >NB
300 are installed • Diameters larger NB150 versions in general are quite expensive compared
with other technologies
2. Hi Pressure • High pressure versions of Prowirl cover up to PN250 but are limited to
max. NB150 • High pressure versions are generally more expensive then dP solutions for
this applications
3. Hi Temperature • Whilst saturated steam applications are well below 400°C superheated
steam is occasionally even higher in temperature
Vortex - Prowirl
Slide 21 SW Lim
24/03/2013
Installation requirement
Vortex - Prowirl
Slide 22 SW Lim
24/03/2013
Vortex - Prowirl
Flow conditioner to reduce inlet run
Slide 23 SW Lim
24/03/2013
Vortex - Prowirl
What should be improved?
Slide 24 SW Lim
24/03/2013
Prowirl 73F – Saturated Steam in Chemical Plant
Vortex - Prowirl
• Borden Chemicals
• Brisbane, Australia
• Saturated steam
• Prowirl 73F
• Remote electronics for easy access
Slide 25 SW Lim
24/03/2013
Prowirl 72F – High pressure steam
Vortex - Prowirl
• Saturated steam, wet
• Pressure 110 bar/1635 PSI
• Temperature 320 °C/610 °F
• Flow Range 680 kg/h /1500 lb/h
• Prowirl 72F:72F40-S92AA1NAB0AW
• NB 1 ½” and 2” Cl.1500 TSP flanges
Chevron Bakersfield, California
Slide 26 SW Lim
24/03/2013
Superheated Steam
Vortex - Prowirl
• Internal Billing Application in chemical industry
• Superheated steam measurement
• V, T and P wired to flow computer
• Mass calculation of superheated steam
Slide 27 SW Lim
24/03/2013
Prowirl 72F – Demineralized Water
Vortex - Prowirl
Measurement technology: • PROline Prowirl 7x
Process: • Monitoring the flow rate of demi-
water for controlling the desalination plant.
• Medium: Demineralized water • Operation: max. 2 bar, max. 25°C
Features: • Compact device with flanges for easy
instrumentation without extra equipment.
• Wide turndown of up to 40:1 for safety flow rates while fluctuate process.
• Proven capacitive sensor and the „Vortex“ system itself for long term accuracy.
Slide 28 SW Lim
24/03/2013
Prowirl 72F Dualsens – Liquid Bitumen
Vortex - Prowirl
• Chemical plant
• Liquid bitumen
• 300°C
• Dualsens model
Slide 29 SW Lim
24/03/2013
Prowirl 72F – Liquid Nitrogen
Vortex - Prowirl
• Ossigeno, Switzerland
• Road tanker unloading
• Several temperature shocks of >200 °K / week
• Liquid N2
• -190 °C, 10 bar
Slide 30 SW Lim
24/03/2013
Prowirl 72F - Liquid Nitrogen
Vortex - Prowirl
Slide 31 SW Lim
24/03/2013
Advantages and Limitation
Vortex - Prowirl
Advantages • High pressure range • Suitable for gas, steam and
liquids • High temperature range • Independent of gas properties
Limitations • Sizes max. DN 300 • Min. flow limitation
Slide 32 SW Lim
24/03/2013
Products Solutions Services
Any Questions?
Slide 33 SW Lim
24/03/2013
Products Solutions Services
Thank you very much for your attention
Slide 34 SW Lim