DMC / total energy metering.pptslide 1 July 01 Daniel Measurement & Control Kyoung Su Kim

DMC / total energy metering.pptslide 2 July 01 BUSINESS UNITS DIVISIONS Daniel and Emerson

DMC / total energy metering.pptslide 3 July 01 Daniel is the leading, global supplier of precision flow measurement equipment and instrumentation for gas and liquid petroleum products in: production( 생산 ), distribution( 분배 ), storage( 저장 ), and transportation applications( 운송 ).

DMC / total energy metering.pptslide 4 July 01 The World Market Whether you are BUYING or SELLING Gas or Liquid Petroleum Products anywhere in the world... the name you can trust is

DMC / total energy metering.pptslide 5 July 01 Ultrasonic Gas Flow Meters

DMC / total energy metering.pptslide 6 July 01 Fundamentals of Ultrasonic Flow Meters Fundamentals of Ultrasonic Flow Meters

DMC / total energy metering.pptslide 7 July 01 Transit Time Measurement PulserReceiver Detector Clock Intrinsically Safe Transducer Signal Loop 100 MHz Oscillator 120 kHz Ultrasonic Signal ( Well Above Control Valve Interference at 60 kHz)

DMC / total energy metering.pptslide 8 July 01 Ultrasonic Transducer Voltage Output 120 KHz In 120 KHz Out Intrinsically Safe 24v DC input

DMC / total energy metering.pptslide 9 July 01 Ultrasonic Flow Meter Transit Time.004 L Flow X D Transit Time

DMC / total energy metering.pptslide 10 July 01 Flow Equations Any pair of transducers tup = L c - v(x/L) tdn = L c + v(x/L) L Flow X D

DMC / total energy metering.pptslide 11 July 01 Flow Equations Flow is determined from transit times v = L 2x (t1-t2) t 1 t 2 c = L 2 (t 1 +t 2 ) t 1 t 2 v = flow velocity c = speed of sound t 1 = upstream transit time (tup) t 2 = downstream transit time (tdn) 2

DMC / total energy metering.pptslide 12 July 01 Flow Velocity Measurement Flowrate derived from velocity and area measurement

DMC / total energy metering.pptslide 13 July 01 SeniorSonic Calculation Multipath means multiple velocity measurements! Multipath Meter A B C D V n = L 2 (t 1 -t 2 ) 2x(t 1 t 2 ) V avg =  W n V n 4 n=1

DMC / total energy metering.pptslide 14 July 01 Geometric Weighting Factors Fixed factors depend on geometry only! Multipath Meter A B C D W A = W B = W C = W D =

DMC / total energy metering.pptslide 15 July 01 Chordal Velocity Measurement A B C D

DMC / total energy metering.pptslide 16 July 01 Multipath Flowrate Calculation Steps to determining flowrate Measure transit times for each path Calculate velocity for each path (A/B/C/D) Calculate "average" velocity Multiply velocity by meter body area

DMC / total energy metering.pptslide 17 July 01 N=5 N=7 N=9 N=11 N=15 Gas velocity is a function of position in pipe V(r) = V o (1-r/r o ) 1/n Why Multiple Paths ?

DMC / total energy metering.pptslide 18 July 01 Three Zone Example Profile and Area Representation

DMC / total energy metering.pptslide 19 July 01 Path Average vs Flow Average Individual Path Velocity is Average for that Path

DMC / total energy metering.pptslide 20 July 01 Chordal Velocity Measurement

DMC / total energy metering.pptslide 21 July 01 Chordal Velocity Measurement

DMC / total energy metering.pptslide 22 July 01 Chordal Velocity Measurement A B C D

DMC / total energy metering.pptslide 23 July 01 Failed Chord Test Results – 4 inch Meter Difference = %

DMC / total energy metering.pptslide 24 July 01 Summary of Inactive Path Results (19 meters)

DMC / total energy metering.pptslide 25 July 01 Flow Rate Calculations Flow Rate is Determined from Velocity Measurement All Flow Information is Dependent on Correct Transit Time Measurement Transit Time Measurements are Performed by Electronic Means

DMC / total energy metering.pptslide 26 July 01 CUI Software PC based interface program Windows 95,98, NT, XP & 2000 Access flow data and diagnostics Remote access via dialup modem Built-in waveform viewer no need for oscilloscope

DMC / total energy metering.pptslide 27 July 01 Meter monitoring screen

DMC / total energy metering.pptslide 28 July 01 Product Improvements Mark III Electronics w/DFI card Audit trail Dual Serial communication ports Frequency outputs

DMC / total energy metering.pptslide 29 July 01 Electronics Feature Summary 862 Hourly and Daily records 2849 Audit & 3640 Alarm records Dual Modbus RS-232/485 multi-drop Four frequency outputs (configurable) P&T inputs (Compensated) and analog output AGA 8 compressibility for corrected volume Bi-directional meter factors

DMC / total energy metering.pptslide 30 July 01 Electronics Feature Summary (Cont.) Configurable for control valve noise 24 Vdc or 110/220 Vac operation Remote access capability Replaceable transducer wiring One electronics for all models

DMC / total energy metering.pptslide 31 July 01 Entire Electronics – CPU, DFI & PS

DMC / total energy metering.pptslide 32 July 01 DFI, Power Supply & CPU

DMC / total energy metering.pptslide 33 July 01 Summary of Gas Ultrasonic Meter (SeniorSonic) Diameter range:DN (4”-42”) Std Operating Temp:-20 to +100 ºC Pressure range:Up to 2500# ANSI Class Measurement channels:4 Path(8 Transducer) Explosion Proof: EEx d ia IIB T4(ATEX) Accuracy limits:Dry calibration +/- 0.30% Flow calibration +/- 0.10% Repeatability:<0.05% of reading Velocity range:0.3m/s to 30+m/s Turndown:Greater than 100 to 1 Features:Bi-Directional Flow available P / T input( Compensation) Retractable Transducers Replaceable Transducer Wiring

DMC / total energy metering.pptslide 34 July 01

DMC / total energy metering.pptslide 35 July 01

DMC / total energy metering.pptslide 36 July 01 Two 20-Inch Custody SeniorSonic Meters

DMC / total energy metering.pptslide 37 July 01 Three 30-Inch Custody SeniorSonic Meters

DMC / total energy metering.pptslide 38 July 01 SeniorSonic Metering Skid