orifice flow meter
- 2. Introduction Presented By: Syed Misbah Ullah M13-CE53
- 3. Orifice flow meter • Table of contents Applications Advantages Disadvantages
- 5. Definition • A device which is used to measure flow rate • It is conduit or restriction to create pressure drop. • Used for all fluids
- 6. Laboratory pic of Orifice meter
- 7. Applications It is used for close system An orifice plate can be use to measure the flow of • Gases • Liquids
- 8. Applications • Gases:- Small dia orifice plate is used for gases because Gases are compressible fluid
- 9. Applications • Liquids:- Large dia Orifice Plate is used for liquids Because liquids are incompressible
- 11. Advantages • Simplest Structure. • Relatively Cheap.
- 12. Advantages • Occupies less space and • installation is easy.
- 13. Advantages • For fluids containing solid particles an eccentric or segmental orifice can be used.
- 14. Advantages • Measuring range can be changed easily
- 15. Advantages • Flow rate is proportional to pressure drop 𝑄 = 𝑘 𝑑𝑒𝑙 𝑃 Q= Flow rate K= A constant value, which is determined by orifice size and types of the fluid del= Change P= differential pressure across the orifice plate
- 16. Disadvantages • Pressure recovery is poor, thus resulting power loss is more. • It maximizes form friction (Friction within the layers of fluids) • Value of Coefficient of discharge is less. It's value is 0.62 to 0.68
- 17. Disadvantages Coefficient of discharge CD= 𝐴𝑐𝑡𝑢𝑎𝑙 𝑓𝑙𝑜𝑤 𝑇ℎ𝑒𝑜𝑟𝑖𝑡𝑖𝑐𝑎𝑙 𝑓𝑙𝑜𝑤 =0.62 to 0.68 (Which mean high losses) • Area of vena contracta has to be calculated
- 18. • Disadvantages • In gas applications in order to be accurate, it requires constant Pressure temperature
- 19. Conclusion o flow sensor which is used throughout the World is the Orifice flow meter due to • Its simple structure, • Easy to install, and • Inexpensive nature
- 20. Syed Misbah Ullah Mob=+923068520193 Institute of Chemical Engineering & Technology Punjab University Lahore