Flowmålemetoder til forskellige installationsforhold. Forskelligt behov? Siemens Flow Instruments A/S T.I: 19/

Transkript

1 Flowmålemetoder til forskellige installationsforhold s Forskelligt behov? Siemens Flow Instruments A/S T.I: 19/

2 Flowmålemetoder til forskellige installationsforhold s Forskellig måleteknologi! Siemens Flow Instruments A/S T.I: 19/

3 Specifikation af en flowmåler s Flowmåle opgave 1. Specificer krav 2. Vurdér teknologi 3. Planlæg installation Siemens Flow Instruments A/S T.I: 19/

4 Specificer krav 1 s Medie Væske 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 Miljø IP klasse Temperatur Korrosion / rengøring Hygiejne krav Tilslutninger Ex område eller sikkert område Siemens Flow Instruments A/S T.I: 19/

5 Specificer krav 2 s Præcisionskrav Absolut nøjagtighed Gentagelsesnøjagtighed Volumen, masse eller energi måling Nulpunktsnøjagtighed Dynamikområde Siemens Flow Instruments A/S T.I: 19/

6 Specificer krav 3 s Regulering eller totalisering? Afregning Batchmåling Overvåge process eller udstyr Trend overvågning Støj overvågning Updateringshastighed Nulstilling Siemens Flow Instruments A/S T.I: 19/

7 Specificer krav 4 s 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 Siemens Flow Instruments A/S T.I: 19/

8 Specificer krav 5 s Godkendelser & lovgivning Drikkevandsgodkendelse Fødevaregodkendelse/pharmaci Afregning Trykdirektiv Ex SIL Siemens Flow Instruments A/S T.I: 19/

9 Specificer krav 6 s Økonomi Før du køber den billigste måler bør du overveje: Hvad koster en målefejl? Hvad koster et nedbræk? Nødvendig levetid? Siemens Flow Instruments A/S T.I: 19/

10 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 page 10

11 Elektromagnetiske flowmålere Virkemåde page 11 When a conductor moves through a uniform magnetic field a potential difference is generated between the ends of the conductor E = B l v E = Elektrode signal B = Flux desity (magnetic field strength) l = Length of conductor (distance between electrodes) v = Velocity (Flow velocity of media)

12 Elektromagnetiske flowmålere MAG meters can only measure: Fluids with electrical conductivity Some examples: Yes Water Milk Chemicals No Gasoline/oil Liquefied gas Demi water page 12

13 Elektromagnetiske flowmålere Typical applications - Food & beverage - MAG 1100 Brewery (Denmark) Dairy (Denmark) page 13

14 Elektromagnetiske flowmålere Typical applications WWW - MAG 3100 / 6000 Desalination plant (Israel and Oman) page 14

15 Elektromagnetiske flowmålere Typical applications WWW MAG 8000 compact IP68 Water supply (MID KENT Water, UK) page 15

16 Elektromagnetiske flowmålere Styrker & 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 page 16

17 Ultralyds flowmålere Virkemåde 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 page 17

18 Ultralyds flowmålere Fluids with and without electrical conductivity page 18 Some examples: Yes Oil Water 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 conductive Multiphase media

19 Ultralyds flowmålere Virkemåde Inline Clamp-on page 19

20 Ultralyds flowmålere Typical applications SONOKIT / Inline 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 SONOKIT advantage: Large dimension range (DN3400) High accuracy (typically %) Perfect for concrete pipes Experience (SONOFLO) page 20

21 Ultralyds flowmålere Typical applications clamp on Application; Sprogø, Denmark Clamp-on DN 400 PVC pipe page 21

22 Ultralyds flowmålere Typical applications - Inline Heat energy for power plant in Horsens in DK Wish: ma- and frequency output Solution: 4x FUS060 with 2x SONO3100 Heat calculator and PT100 temperature sensor pair was customer specified ( Kamstrup ) FUS Benefits: Suitable for large dimensions Perfect for high temperature Long experience in Energy (SONOFLO) page 22

23 Ultralyds flowmålere Styrker & 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 page 23

24 Coriolis masseflowmålere If you can pump it, Coriolis can measure it! Liquids, gasses, slurries, density and fraction Application area Requirements to media: - Homogenous - Homogeneous mix of solids - Air free (homogenous mix) page 24

25 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] page 25

26 Coriolis masseflowmålere Virkemåde Driver amplitude Coriolis amplitude m = k Δt Δt page 26

27 Coriolis masseflowmålere Virkemåde page 27

28 Coriolis masseflowmålere Typical 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. page 28

29 Coriolis masseflowmålere Typical applications - Chemical industry 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. page 29

30 Coriolis masseflowmålere Typical applications - Automotive The priority is Cutting costs of manufacturing. This can be done by: less material waste more accurate and repeatable process control BOSCH ABS Test Rig SITRANS FC300 page 30

31 Coriolis masseflowmålere Styrker & 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 page 31

32 Planlæg installationen! Mål altid så direkte som muligt ud fra det virkelige behov Placer måleren så arbejdsbetingelserne bliver så konstante som muligt Dimensioner måleren så den arbejder i dens optimale arbejdsområde Minimer eksterne påvirkninger hvis muligt (kræfter, vibrationer kondens) Undgå at placere lige efter bøjninger, ventiler, T-stykker etc. page 32

33 Thank you very much