Multivariable Flow Measurement

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I have prepared this presentation after successful commissioning of two such Multivariable Transmitters with 1595 Conditioning Orifice, used to measure raw gas of two trains in OMV (Pakistan) Exploration GmbH. Sawan gas processing plant,

  • dear mr:Ali

    i have a concern in our multiveriable transmitter.the ranhe of the transmitter is 0-5500 mm h2o.this transmitter is always bad ,so i took the physical measurements as shon below



    range=0-5500 mm H2o

    Transmitter orifice details from the tab

    DIAMETER=7.207 ‘’

    MFG#656239 003

    12’’ 300/316

    READING FROM THE FIELD TRANSMITTER

    FLOW = 92.714 T/H

    PERSSURE =16.82Kg

    TEMP =45.195 DEG CEL

    READING FROM TRANSMITTER DRAIN POINT HP AND LP SIDE

    HP =6794 ‘’ H2o

    LP =6577 ‘’ H2o

    DELTA P = 217’’ H2o

    =5511.8mm H2o

    even the delta p is below the range ,transmitter is showing bad.can you please tell me the reason and relation of pressure ,temperature and d/p.

    your immidiadte responds is highly appritiated

    thanks
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  • dp transmitter The DPT-4001 differential pressure transducer sensor operates on the capacitance principal and is capable of sensing ultra low differential pressures. In the capacitance cell, a very lightweight, responsive diaphragm deflects a small amount when pressure is applied. This deflection results in a change in capacitance, which is then detected and processed electronically into 4-20 mA output signal linear to the differential pressure.
    http://www.paragoncontrols.com/airflow_pressure_measurement_DifferentialPressureTransducers.aspx
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Multivariable Flow Measurement

  1. 1. Flow Measurement Through MULTIVARIABLE Transmitter
  2. 2. Conventional Flow Calculation FLOW COMPUTER / DCS
  3. 3. Traditional DP TRANSMITTER, DP flow has been calculated in a DCS or flow computer using a simplified mass flow equation. In simplified DP mass flow measurements, a constant is used to represent many of the terms in the flow calculation The constant combines unit conversion factor, velocity of approach factor, gas expansion factor, and discharge coefficient. The simplified flow equation cannot compensate for changes in these terms, resulting in unrecorded errors in the calculated flow rate. Conventional Flow Calculation FLOW COMPUTER / DCS
  4. 4. Enhance Flow Calculation MULTIVARIABLE TRANSMITTER
  5. 5. Qmass = Mass flow N = units conversion factor Cd = discharge coefficient E = velocity of approach factor Y1 = gas expansion factor d2 = bore of differential producer DP = Differential pressure p = density The MULTIVARIABLE TRANSMITTER (3095MV) provides the greatest DP flow accuracy over the widest operating range by dynamically calculating all flow equation coefficients real time, including discharge coefficients, velocity of approach factor, thermal expansion effects, and density. This fully compensated flow equation reduces the sources of traditional DP flow uncertainty, thereby providing a more accurate flow calculation. It uses a fully compensated equation from mass flow through any differential producer Enhance Flow Calculation MULTIVARIABLE TRANSMITTER
  6. 6. How Does MULTIVARIABLE Tx3095MV Calculate Mass Flow? Using the EA Software the user enters the process fluid (EA database already knows molecular weight, isentropic exponent, and constants), primary element type and size, and pressure and temperature operating conditions. The Model 3095MV measures the static pressure, differential pressure, and process temperature. The internal flow computer dynamically calculates all flow equation coefficients in real time including: discharge coefficient, velocity of approach factor, thermal expansion effects, and density Result is the greatest DP flow accuracy over the widest operating range!
  7. 8. Advantages of MULTIVARIABLE TRANSMITTER 3095MV Primary element and fluid flexibility Provides flow computer functionally in a single, compact package. Dynamically Compensated mass flow 1% of mass flow rate accuracy over 10:1 flow range Four measurements (Qm, DP, P, T) in one device providing real-time data to perform mass and heat balances across process units. Output options 4-20 mA / HART based , Configuration of Pressure, Temp & DP through HART , Easy to configure with AMS & Engineering Assistant (EA) software
  8. 9. The innovative technology and design of the Conditioning Orifice Plate enables multiple benefits without compromising performance. The Conditioning Orifice Plate follows the discharge coefficient of the ISO 5167-2:2003(E) Conditioning Orifice Plate rivals the performance of the standard orifice plates while virtually eliminating straight pipe run requirements. With sufficient straight run, the accuracy curve of the Conditioning Orifice Plate would follow the ISO 5167 standard. Rosemout 1595 Conditioning Orifice Plate
  9. 10. Conditioning Orifice Plate Technology is based on the same Bernoulli streamline energy equation and as a result follows the same Discharge Coefficient versus Reynolds Number relationship as standard orifice plates. Installation in short straight pipe run, tight fit applications. Improved performance in wet gas applications by allowing condensate to pass and preventing the “damming” affect suffered by standard orifice plates. None of the three standards provide allowances for drain vent holes in the orifice plate. Rosemout 1595 Conditioning Orifice Plate
  10. 11. Rosemout 1595 Conditioning Orifice Plate
  11. 12. Rosemout 1595 Conditioning Orifice Plate
  12. 13. Configuration with HART Communicator Configuration with AMS / Engineering Assistant (EA) software
  13. 14. Configuration with AMS / Engineering Assistant (EA) software
  14. 15. Process parameters Display Configuration with AMS / Engineering Assistant (EA) software
  15. 16. Configuration with AMS / Engineering Assistant (EA) software Flow configuration wizard
  16. 17. Configuration with AMS / Engineering Assistant (EA) software
  17. 18. Configuration with AMS / Engineering Assistant (EA) software Gas Calculation Method Selection
  18. 19. Configuration with AMS / Engineering Assistant (EA) software Gas Composition for Density measurement
  19. 20. Configuration with AMS / Engineering Assistant (EA) software Primary Element 1595 Conditioning Orifice Plate selection
  20. 21. Configuration with AMS / Engineering Assistant (EA) software Operating envelope (Pressure & Temperature)
  21. 22. Configuration with AMS / Engineering Assistant (EA) software Auto Compressibility Calculation for corrected volume
  22. 23. Configuration with AMS / Engineering Assistant (EA) software Configuration properties
  23. 24. Configuration with AMS / Engineering Assistant (EA) software Configuration properties
  24. 25. Configuration with AMS / Engineering Assistant (EA) software Configuration properties
  25. 26. Configuration with AMS / Engineering Assistant (EA) software Configuration properties
  26. 27. Configuration with AMS / Engineering Assistant (EA) software Configuration properties
  27. 28. Configuration with AMS / Engineering Assistant (EA) software Configuration properties
  28. 29. Configuration with AMS / Engineering Assistant (EA) software Configuration properties
  29. 30. Configuration with AMS / Engineering Assistant (EA) software Configuration properties
  30. 31. Configuration with AMS / Engineering Assistant (EA) software Configuration properties
  31. 32. Configuration with AMS / Engineering Assistant (EA) software Configuration properties
  32. 33. Configuration with AMS / Engineering Assistant (EA) software Configuration properties
  33. 34. Configuration with AMS / Engineering Assistant (EA) software Configuration properties
  34. 35. Configuration with AMS / Engineering Assistant (EA) software Configuration properties
  35. 36. Configuration with AMS / Engineering Assistant (EA) software Configuration properties
  36. 37. Configuration with AMS / Engineering Assistant (EA) software Configuration properties
  37. 38. Configuration with AMS / Engineering Assistant (EA) software Online Validation on DP, Pressure & Temperature
  38. 39. Configuration with AMS / Engineering Assistant (EA) software Parameters display
  39. 40. THANK YOU
  40. 41. Q A QUESTION ANSWERS

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