Forskellig måleteknologi!20Flowm%E5... · Siemens Flow Instruments A/S T.I: 19/11-2009 Specificer krav 4 Forsyning & kommunikation (MMI) Display Relæ Analog udgang (f.eks 4-20mA)

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Siemens Flow Instruments A/S

T.I: 19/11-2009

Flowmålemetoder til forskellige installationsforhold

Forskelligt behov?

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T.I: 19/11-2009

Flowmålemetoder til forskellige installationsforhold

Forskellig måleteknologi!

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T.I: 19/11-2009

Specifikation af en flowmåler

Flowmåle opgave

2. Vurdér teknologi

1. Specificer krav

3. Planlæg installation

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T.I: 19/11-2009

Specificer krav 1

MedieVæske eller gas

Tryk (inkl. Vacuum & pulsationer)

Temperatur (inkl. evt chok)

Aggressivitet

Rent eller med fremmedpartikler

En eller flerfaset

Ledende eller isolerende

Aflejringer

Flowprofil

Hygiejne krav

IP klasse

Temperatur

Korrosion / rengøring

Hygiejne krav

Tilslutninger

Ex område eller sikkert område

Miljø

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T.I: 19/11-2009

Specificer krav 2

Præcisionskrav

Absolut nøjagtighed

Gentagelsesnøjagtighed

Volumen, masse eller energi måling

Nulpunktsnøjagtighed

Dynamikområde

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T.I: 19/11-2009

Specificer krav 3

Regulering eller totalisering?Afregning

Batchmåling

Overvåge process eller udstyr

Trend overvågning

Støj overvågning

Updateringshastighed

Nulstilling

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T.I: 19/11-2009

Specificer krav 4

Forsyning & kommunikation (MMI)Display

Relæ

Analog udgang (f.eks 4-20mA)

Digital udgang (f.eks 0-10kHz frekvens eller puls til tæller)

Seriel bus (f.eks Profibus PA)

Parallel bus (f.eks HART)

Opsætning manuelt på transmitter eller via bus eller service kanal

Forsyning med batteri, DC aller AC

Trådløs kommunikation til opsætning/aflæsning (f.eks Irda) eller dynamiske måledata (f.eks Wireless HART eller wireless M-Bus)

Diagnose

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T.I: 19/11-2009

Specificer krav 5

Godkendelser & lovgivning

Drikkevandsgodkendelse

Fødevaregodkendelse/pharmaci

Afregning

Trykdirektiv

Ex

SIL

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T.I: 19/11-2009

Specificer krav 6

ØkonomiFør du køber den billigste måler bør du overveje:

Hvad koster en målefejl?

Hvad koster et nedbræk?

Nødvendig levetid?

page 10 Group / Region / DepartmentProtection notice / Copyright notice

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Valg af teknologi

SITRANS F M Electromagnetic flow meters

Conductive fluids Clean slurries, paper &

pulp Good price performance Most recognised Easy to use Comprehensive product

range for all industries Sizes DN 2 to 2000

SITRANS F C Coriolis mass flow meters

Mass flow [kg] Low flow performance Liquid & gas Multiparameter Easy to use Comprehensive product

range for all industries Sizes Di 1.5 to Di 40,

and DN 50 to DN 150

SITRANS F US Ultrasonic flow meters

Large sizes cost efficient Clean non conductive

liquids Hot water applications District heating Non conductive fluids e.g. oil Sizes DN 25 to 4000 Clamp On technology


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Elektromagnetiske flowmålereVirkemåde

When a conductor moves through a uniform magnetic fielda potential difference is generated between the ends of the conductor

E = B·l·vE = Elektrode signalB = Flux desity (magnetic field strength)l = Length of conductor (distance between electrodes)v = Velocity (Flow velocity of media)


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Elektromagnetiske flowmålere

MAG meters can only measure:

Fluids with electrical conductivity

YesWaterMilk Chemicals

NoGasoline/oil Liquefied gas Demi water

Some examples:


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Elektromagnetiske flowmålereTypical applications - Food & beverage - MAG 1100

Brewery (Denmark)Dairy (Denmark)


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Elektromagnetiske flowmålere Typical applications – WWW - MAG 3100 / 6000

Desalination plant (Israel and Oman)


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Elektromagnetiske flowmålere Typical applications – WWW – MAG 8000 compact IP68

Water supply (MID KENT Water, UK)


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Elektromagnetiske flowmålereStyrker & svagheder

Strengths works on almost any conductive liquid accurate and repeatable no pressure drop in the process. large measuring range (1/12” to 10 feet) bidirectional measurement

Limitations does not work for gases or steam. does not work on non-conductive fluids (hydrocarbons, ultra clean water) electrodes subject to coating

Application area


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Ultralyds flowmålereVirkemåde

Transit time flowmeters work by measuring the time difference (∆T) between an ultrasonic pulse sent in the flow direction (downstream) and an ultrasound pulse sent opposite the flow direction (upstream). The greater flow the larger transit time difference

SONOFLO® - Ultrasonic time of flight

V = K * ∆T


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Ultralyds flowmålere

Yes OilWater and demi water District heating water (incl. additives) Gas

No Steam, because of pressure and temperature conditions Glacial Acetic Acid, because this acid is not very sonically conductiveMultiphase media

Some examples:

Fluids with and without electrical conductivity


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Ultralyds flowmålereVirkemåde

Inline Clamp-on


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SONOKIT advantage: Large dimension range (DN3400) High accuracy (typically 0.5 .. 1%) Perfect for concrete pipes Experience (SONOFLO)

Application in a power station: Cooling water,

concrete pipe Di = 3.40m Solution: SONOKIT-2

Benefit: - Installation with the pipe manufacturing- Full integration in the pipe construction- Stable construction

Ultralyds flowmålereTypical applications – SONOKIT / Inline


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Ultralyds flowmålere Typical applications – clamp on

Application;Sprogø, Denmark

Clamp-onDN 400 PVC pipe


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“FUS” Benefits:

Suitable for large dimensions

Perfect for high temperature

Long experience in Energy (SONOFLO)

Heat energy for power plant in “Horsens” in DKWish: mA- and frequency output Solution: 4x FUS060 with 2x SONO3100

Heat calculator and PT100 temperature sensor pair was customer specified („Kamstrup“)

Ultralyds flowmålereTypical applications - Inline


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Ultralyds flowmålereStyrker & svagheder

Strengths no moving parts and no pressure loss

can work on a very large range of pipes (1/4” to 30 ft) clamp-on units save installation costs clamp-on: no need for stopping the process both conductive and non-conductive liquids gas applications

Limitations installation is sensitive to mounting location longer inlet pipe requirements process events (build up inside the pipe, air bubbles, noise) can affect performance small pipe sizes are not easy/typical

Application area


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Coriolis masseflowmålere

If you can pump it, Coriolis can measure it!Liquids, gasses, slurries, density and fraction

Requirements to media:- Homogenous- Homogeneous mix of solids- Air free (homogenous mix)

Application area


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Coriolis masseflowmålere Multi-parameter flowmåling

Mass flow rate [Kg/s]Total mass [Kg]Density [Kg/m3]Temperature [°C]Volumetric flow rate [l/s]Total volume [l]Fraction flow [Kg/s]% Fraction [%]Total fraction [Kg]


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Coriolis masseflowmålereVirkemåde

Driver amplitude Coriolis amplitude

Δt

m = k·Δt·


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Coriolis masseflowmålereVirkemåde


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Coriolis masseflowmålereTypical applications - Food & beverage

These meters are very common to drink manufacturers. Proportions, like the sugar content in drinks, are very important to the recipe. The Coriolis meter provides highly accurate control of the manufacturing of the product.

An inline mixing skid used for drink manufacturers.


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When extracting oil from the ground, a common measurement that is required is the amount of water in the oil. This can be done using the density measurement from the meter and will identify how much oil is left in the well.

Coriolis masseflowmålereTypical applications - Chemical industry


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Coriolis masseflowmålereTypical applications - Automotive

The priority is……Cutting costs of manufacturing. This can be done by: less material waste more accurate and repeatable process controlBOSCH ABS Test Rig

SITRANS FC300


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Coriolis masseflowmålereStyrker & svagheder

Strength very high accuracy and repeatability true mass flow measurement multiple measurement (mass, volume, temperature,

density)

Limitations limited size for meters (1/12” to 10”) can cause pressure drop in the process that interferes

with quality Application area


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Planlæg installationen!Mål altid så direkte som muligt ud fra det virkelige behovPlacer måleren så arbejdsbetingelserne bliver så konstante som muligtDimensioner måleren så den arbejder i dens optimale arbejdsområdeMinimer eksterne påvirkninger hvis muligt (kræfter, vibrationer kondens)Undgå at placere lige efter bøjninger, ventiler, T-stykker etc.

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Protection notice / Copyright notice

Thank youvery much

Documents

Forskellig måleteknologi!20Flowm%E5... · Siemens Flow Instruments A/S T.I: 19/11-2009 Specificer krav 4 Forsyning & kommunikation (MMI) Display Relæ Analog udgang (f.eks 4-20mA)