Your SlideShare is downloading. ×
Flow
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Flow

398
views

Published on

flow meter presentation

flow meter presentation

Published in: Technology, Business

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
398
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
42
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. FlowMeasurement
  • 2. Basic Flow Measurement Many methods of flow measurement Bernoulli’s Equation – A statement of energy conservation 1 2 p + ρv + ρgy = constant 2
  • 3. Flow Pattern
  • 4. Orifice Plate Orifice Plate Flow Sharp Edge Bevel High Pressure Low Pressure Sensing Line Sensing Line
  • 5. Typical Orifice Plates
  • 6. Beveled Edge on Orifice
  • 7. Typical Transmitter Installation
  • 8. Flange Taps
  • 9. Vena Contracta Taps
  • 10. Pro’s and Con’s High delta P High pressure loss Lots of data Erosion Low cost Easy replacement
  • 11. Venturi Tube
  • 12. Flow Nozzle
  • 13. Elbow Taps
  • 14. Pitot Tube
  • 15. Annubar
  • 16. Annubar
  • 17. Annubar
  • 18. Annubar
  • 19. Annubar
  • 20. Output of the Transmitter ∆P
  • 21. Square Root Extractor
  • 22. Flow Loop with Square RootExtractor
  • 23. Extractor at Low Inputs
  • 24. Cutoff Relay
  • 25. Effect of Process Conditions Flow measurements are inferential – Measure a pressure drop and infer a flow Affect by density of the fluid – Temperature – Pressure – Increasing density increases the indicated flow rate
  • 26. Density Compensating Flow High Pressure Sensing Line RTD Low Pressure Sensing Line DP Cell Pressure Cell Logic 4-20 mA Output
  • 27. Flow Measurement Errors Erosion Over ranging the D/P cell Vapour formation in the throat Clogging Plugged or leaking impulse lines
  • 28. For you to do Read pp. 18-32 Answer Questions pp. 82-85, #6-14

×