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Water metering & its significance_Sanjeev Saraswat,Yokogawa_2013
 

Water metering & its significance_Sanjeev Saraswat,Yokogawa_2013

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Water metering, the process of measuring water, is a means of achieving water use efficiency. The types available in the market, their design & their accuracy is described here.

Water metering, the process of measuring water, is a means of achieving water use efficiency. The types available in the market, their design & their accuracy is described here.

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    Water metering & its significance_Sanjeev Saraswat,Yokogawa_2013 Water metering & its significance_Sanjeev Saraswat,Yokogawa_2013 Presentation Transcript

    • Water Metering – Its significance Sanjeev Saraswat YOKOGAWA INDIA LIMITED <Document Number> Copyright © Yokogawa Electric Corporation <date/time> -1-
    • Agenda Why Metering Type of flowmeter Electromagnetic flowmeter–Design & construction – Flow tube – Electronics Accuracy Calibration <Document Number> Copyright © Yokogawa Electric Corporation <date/time> -2-
    • WHY METERING <Document Number> Copyright © Yokogawa Electric Corporation <date/time> -3-
    • WHY METERING Cost of Water – Increasing cost because of high expectation of water quality, reliability and sustainability – Expensive to treat – Water rate increasing because of the new filtration plant Water Metering – Effective way of water conservation, particularly when working with other water saving techniques – Pay for the water you use – Provide financial incentive to save water <Document Number> Copyright © Yokogawa Electric Corporation <date/time> -4-
    • Water Metering Water metering is the process of measuring water use. Water meters are used to measure the volume of water used by residential and commercial building that are supplied with water by a public water supply system. Water meters can also be used at the water source, well, or throughout a water system to determine flow through a particular portion of the system. In most of the world water meters measure flow in cubic meters (m3) or litres but in some countries water meters are calibrated in cubic feet (ft.3), or US gallons. <Document Number> Copyright © Yokogawa Electric Corporation <date/time> -5-
    • Velocity Profile flow measurement turbulent flow, Re > 20000 turbulent flow, Re > 20000 Disturbed flow due to swirling What velocity point represents the flowrate? <Document Number> Copyright © Yokogawa Electric Corporation <date/time> -6-
    • FLOW METERING <Document Number> Copyright © Yokogawa Electric Corporation <date/time> -7-
    • Type of Meters Mechanical meters – Propeller senses velocity; Converted to flow rate via gear ratios – Straight section of pipe is best (avoid turbulence); Pipe must be full Pressure differential methods – Difference in pressure is directly related to velocity (fundamental energy relationship in hydraulics) – Pitot tubes, Venturi meters, orifice methods Ultrasonic methods – Non-intrusive (transducers clamped on the outside of the pipe) <Document Number> Copyright © Yokogawa Electric Corporation <date/time> -8-
    • Magmeter principle and benefits • Faraday’s Law Practical design Benefit Measurement: Volume flow, velocity Performance: Good accuracy and wide application range for conductive fluids Non intrusive principle with high turn down and no pressure drop <Document Number> Copyright © Yokogawa Electric Corporation <date/time> -99
    • Why Install A Magmeter? Ideal for conductive fluids (min 1 mS/cm) – Water or Slurries No moving parts – Minimal maintenance No impedance to the flow – Minimal chance of blockage & hence downtime – Minimal loss of pressure from pumps. Highly accurate (<0.5% of measured value) Immune to viscosity & density variations Minimum piping requirements <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 10 Page.10
    • Selection of Electromagnetic Flowmeter Media & Media state Flow rate - Min, Oper, Max Pressure Temperature Density Viscosity Suspended Solids Conductivity Installation – Integral/Remote Process Connection Area classification Line size, material & schedule … Performance parameters Diagnostics, Recording, Indication, Totalisation ….. <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 11 -
    • Flow tube construction Rugged Design <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 12 -
    • Construction of Yokogawa ADMAG 11 10 9 2 4 1 6 5 7 8 3 <Document Number> Copyright © Yokogawa Electric Corporation <date/time> AXF AXR - 13 13
    • Magflo selection - Liner • Provide insulation in flowmeter • Selection of liner – Media – Adhesion – Abrasion – Pressure loss – Life – Fluid turbulence • Surging / Pulsating flow – Full bore external powered flowmeter remain unaffected – Battery-powered types can be susceptible to surging or pulsing flow due to their low measurement sampling rate <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 14 -
    • Variety of Liners • Rubber • Polymer – Teflon - Only DuPont makes Teflon® • Moulded – PFA, FEP • Extruded - PTFE http://www2.dupont.com/Teflon_Industrial/en_US/products/product_by_name/ <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 15 -
    • Extruded liner (PTFE) Mandrel Movie <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 16 -
    • Moulded Liner (PFA) Mendrel <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 17 -
    • Availability leads to benefit - Wide Usage flowmeter Magmeter - PFA Lined flow tube Conventional Type ADMAG reliable Type Electrode Sealing Exposed Electrode Seal Extruded Liner Construction Un-Retained Liner ADMAG Electrode Conventional Electrode Extruded liner 7 Superior Electrode Seal Molded Liner Construction Mechanically Retained Liner Moulded Liner <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 18 - Pag
    • Difference of Inlet / Outlet Sealing PTFE Lining Badly bent 90 deg.! Prone to breakage Molded Teflon liner “PFA ” Extruded Teflon liner “PTFE ” <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 19 - 19
    • Lining – Extruded liner PTFE After 3 months, peeling start <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 20 -
    • Liner availability <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 21 -
    • Variety of flange connections EN EN 1092-1 PN10/16 JIS B2220 10K ASME B16.5 B16.47 AS 2129 Table D 2129 Table E 4087 PN16 AWWA C207 Class D <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 22 -
    • Rotatable electrical connection • Rotatable electrical connection can realizing easy wiring. <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 23 -
    • Installation without the Grounding Rings Stray current Stray current Electrically connected to AXW and pipe flange using metal wire (supplied customer). Check the electrical connection with the tester. <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 24 - Ground
    • The Structure of Grounding Ring • Grounding rings are fixed to flow tube with screws • Provides large surface area for grounding Grounding ring AXW Gasket (supplied customer) <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 25 -
    • ELECTRONICS Reliable Design <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 26 -
    • Coil excitation <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 27 -
    • Excitation Method & Benefit AC Powered Excitation Pulse DC Excitation Dual Frequency Excitation Excitation Waveform Low Flow Flow Signal Waveform High Flow Zero Stability Slurry Immunity Fast Response Pow er Consumption = Excellent = Good <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 28 - Proprietary info goes here… = Fair = Poor
    • Output/Input • 4-20mAdc • Pulse/Freq – 0-10000Hz • Status Output -2 • Auto 2 range indicate, • Forward and reverse indicate, • Totalization switch indicate, • Low limit indicate Either one of the following 2-range switching with external input, Totalization presetting, Zero% signal lock. <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 29 - • Alarm Output -1
    • Display White cotton glove <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 30 - Rubber glove for domest ic use High temp . use glove
    • Water Challenges Common perception • Clean • Easy to handle • Longer life • No maintenance <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 31 Page.31
    • More Information from each Instruments - Magflo • Counter measures in event of error 1.2345m3/h 12345678 FR Display mode FTL 2 second Alternates Process Alarm 31: Empty Pipe Fill flow tube with fluid Alarm mode 2 seconds Countermeasure message for Alarm <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 32 -
    • External Power vs Battery Powered • AC powered with Battery Powered battery back-up – Lower meter cost – Huge installation base – Low cost of ownership • Easy maintenance • No consumable • Consumables – Battery (Sourced from meter supplier only) – Poor performance against pulsating flow – Ambient temp effect is high – Limited vendors – Best performance – Multiple vendors <Document Number> Copyright © Yokogawa Electric Corporation <date/time> – Higher meter cost – Limited installation base – High cost of ownership - 33 -
    • Expert Comments 1. Batteries achieve optimum service life if used at 20° (68° or C F) slightly below 2. If, for example, a battery operates at 30° (86° instead of a C F) more moderate room temperature, the cycle life is reduced by 20 percent. 3. At 40° (104° the loss jumps to a whopping 40 percent, and if C F), charged and discharged at 45° (113° the cycle life is only half C F), of what can be expected if used at 20° (68° C F). <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 34 -
    • ACCURACY Reading between the line <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 35 -
    • Magnetic Flowmeter – Accuracy Statement % of % of % of limit) % of Rate full scale Percent of meter capacity (upper range calibrated span Different accuracy statements defined by vendors can be confusing to customers and now % of reading + xx mm/sec <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 36 -
    • Magnetic Flowmeter - Accuracy Performance specified as a percent of rate, percent of full scale, percent of meter capacity, and percent of calibrated span are different Performance statements can be manipulated because their meaning may not be clearly understood <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 37 -
    • Magnetic Flow meter - Accuracy Typical customer requirement – Flow rate : 0 – XXX m3/hr – Accuracy : 0.5% Flow meter selected typically max. flow corresponding to flow velocity approx. 3m/s Flow velocity at minimum & normal flow rate will be very less Magmeter offering better accuracy at low flow rate is desired <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 38 -
    • CALIBRATION <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 39 -
    • Flowmeter Calibration • Wet calibration – Primary flow laboratory – Flow calibration facility • Dry calibration – Physical dimensions – Electronic techniques • Verification of operation <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 40 - Proprietary info goes here… 40
    • Primary Flowmeter Laboratory <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 41 - Proprietary info goes here… 41
    • Flow Calibration Facility <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 42 - Proprietary info goes here… 42
    • Dry Calibration • Dry calibration – Verify physical dimensions – Electronic techniques • • • • Zero Span Scaling factor Analog output <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 43 - Proprietary info goes here… 43
    • SUMMARY PFA liner upto 400mm; PTFE above 500mm Flush electrode Adhesion level diagnostic Dual/High frequency excitation (Frequency > line freq) 3 line back-lit LCD display with bargraph Diagnostic display in clear message Accuracy at min, oper & max flowrate Output – Analog, frequency, status, alarm <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 44 -
    • History of YOKOGAWA’s Magnetic Flowmeter ’94 ADMAG AE Integral type Ex-proof type ’95 ADMAG CA Capacitance electrode 0.01µS/cm ’09 ADMAG AXR 2wire with Dual frequency excitation ’12 ADMAG AXW Simplified Robust Large size ’83 YEWMAG Signal Processing Pulsed DC Slurry mode (30Hz) 1980 19901990 2000 ’03 ADMAG AXF Enhanced dual frequency excitation, Adhesion check Replaceable electrode ’88 ADMAG Dual frequency excitation <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 45 - 2010
    • History of Large Size Magnetic Flowmeters (from our old album) <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 46 -
    • Big Size ADMAG - Inspection <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 47 Page.47
    • More Information www.admagaxf.com <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 48 -
    • Thank you marketing@in.yokogawa.com <Document Number> Copyright © Yokogawa Electric Corporation <date/time> - 49 -