Following are some of the fluid flow measuring devices which are available for the flow rate measurement.
- Orifice Plate
- Venture Tube
- Flow Nozzles
- Variable Area
Orifice Plate
Recommended: Orifice Plate Lab Report
Advantages
•Orifice plate is very simplest instrument available which is also very easy to install and remove
•Have high pressure recover efficiency of 65 percent
•Have the ability of measure flow rate over a wide rage
•Cost effective
Disadvantages
•It only support those fluid that are homogeneous is nature
•It work under a limited viscosity of fluid
•Accuracy of orifice plate depends on fluid density, viscosity and pressure
•Working limited to horizontal applications
Venture meter
Recommended: Venture Meter Lab Report
Advantages
• Offer horizontal, vertical and inclined flow measurement
• Perfect working behavior prediction
• Very high pressure recovery efficiency of 90 %
• Highly accurate for a wide range of flow rates
Disadvantages
•Required more space for installation as they have large is size due to their working method
•Have high initial cost
•Difficult to install and remove
•Have limitation of minimum pipe diameter of 7.5 cm
Flow Nozzle
Advantages
•Small in size as compared to venture meter
•Easy to install and remove
•Cost effective
•Discharge coefficient of flow nozzle is high
Disadvantages
•Pressure recovery efficiency is low
•High maintenance cost
•Required more area as compared to orifice plate
Variable area
Advantages
•Offers constant drop in pressure over the length of tube
•Simple construction
•Easy to install and maintain
•Work perfectly for liquid and gas
Disadvantage
•Work only in vertical direction
•Transparent material is required for construction
•High pressure loss
•Limited rage for fluid viscosity
Four different types of flow meters has been present above with their advantages and disadvantages and according to those venture meter is the best choice for the flow meter as it has highest value of pressure recovery efficiency, offer flow rate measurement I any direction and can work I wide range of flow rate. It has high cost and difficulty in installation but that’s one time work.
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