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Competition

Competition. Other types of flow meters Thermal Mass flow competition. Gas is Compressible. Flow Meters. All of these technologies except Thermal and Coriolis measure flow based on density of the gas at the pressure and temperature when the measurement is made.

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Competition

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  1. Competition Other types of flow meters Thermal Mass flow competition

  2. Gas is Compressible

  3. Flow Meters All of these technologies except Thermal and Coriolis measure flow based on density of the gas at the pressure and temperature when the measurement is made • Many types – No Perfect Technology • Differential Pressure • Orifice Plates • Venturi • Averaging Pitot tubes • V-Cone • Vortex • Turbine • Ultrasonic • Positive Displacement • Thermal • Coriolis

  4. Why measure Mass Flow • Not effected by process changes • Repeatability in flow measurements • Process Operations based on mass balance (mass is conserved) • Combustion is based on mass

  5. Orifice Plate DP

  6. Orifice Plates Proven method of flow measurement Well accepted Often customer’s first choice

  7. Venturi Advantage of a Venturi is much of the pressure loss is recoverable Disadvantage installed cost ΔP

  8. Averaging Pitot Tube AKA – Annubar Benefits of sampling velocity at different points. No permanent pressure loss.

  9. Averaging Pitot Tube

  10. DP vs. Flow Differential Pressure Flow Measurement • Measures flow at operating gas density (actual conditions) • Square root relationship between flow and pressure drop • Poor low flow sensitivity • Limited Turndown • May consumes pressure

  11. Vortex Flow Meters Number of vortices dependent upon Reynolds Number

  12. Vortex Meters • In line instrument (few insertion style) • Price increases dramatically with pipe size • Require minimum velocity to generate vortices • Reynolds Number dependent • Poor low flow sensitivity • Measure higher flow rates than Thermal • Not Mass Flow

  13. Turbine Flow Meter Pulse output that goes to electronics to calculate flow rate, total flow, or both

  14. Turbine Flow Meter Issues: • Moving parts in the flow path • Clean gases only • Measure flow at actual operating conditions • Not mass flow (Need to adjust for gas density) • Pressure Drop

  15. UltrasonicTransit Time Requires Pressure and Temperature correction High rangeability Clamp on design Expensive

  16. Ultrasonic Flare Flow Meter

  17. Positive Displacement Mechanical device – moving parts Requires clean/dry gas Pulse output Totalized flow rather than flow rate Requires pressure and temperature correction

  18. Coriolis Mass Flow • Direct Mass Flow • High Accuracy • Very high cost • Limitations on pipe sizes (12 inch maximum) • May not be suitable for low pressure gas flow applications

  19. Advantages of Thermal Mass Flow Low flow capabilities Low maintenance High Turndown Good accuracy Excellent repeatability Easy to install Lowest cost of ownership

  20. Thermal Competition

  21. Competition FCI Sierra Instruments Fox Thermal E+H Kurz Instruments Magnetrol Eldridge

  22. Sierra Boiler Trak Sierra “Boiler Trak” Low cost flow meter for natural gas measurement. • No Hazardous Area Approvals • Standard Air Correlation calibration • Actual gas calibration extra • Fragile light duty epoxy, glass coated ceramic sensor

  23. FCI • ST50/ST51 • Low cost low feature • ST98 • Workhorse for heavy process industry

  24. FCI ST100 Expensive Lot of nice features that few customers need • Many features • Graphic display • Optical touch keypad • Multiple sensor tips • 4 conduit openings • 2 mA + 1 pulse output • Multiple digital outputs • Optional alarms • 4-20 mA input • 5 gas calibration • Data logger • Markings on probe

  25. FCI Veri Cal ST100 only

  26. Fox FT3 Only checks electronics

  27. Other • Calibration verification of other thermal flow meters: • Sierra 640S – connect to computer, only checks electronics • Eldridge – none • Magnetrol – two point – no flow and simulated high flow

  28. Calibration Verification • Sage • Insitu calibration • No hardware required • Tests both sensor and electronics • Information on nameplate • No need to find documentation • Accepted by customers

  29. Hazardous Area Class 1 Div 1 Hazardous conditions occur during normal operation Requires rigid conduit and conduit seals

  30. Hazardous Area Class 1 Division 2 Hazardous conditions only occur during upset Flexible conduit No seals

  31. Hazardous Areas • Only have Class 1 Div 1 Approval • Fox FT3 • FCI ST100 • Sierra 640S • Eldridge Master-Touch

  32. Advantage of Sage In Situ calibration verification Lowest power consumption Graphic display Compact enclosure Competitive pricing Real gas calibration Excellent customer service Competitive pricing Good delivery

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