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Omega Tube Design Extends the Usability of Coriolis Technology in Mass Flowmetering Applications. Presented by John Daly NA Sales Manager Rheonik USA. Introduction.
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NA Sales Manager
The objective of this session is to introduce Omega Tube Coriolis technology, comparing it to conventional Coriolis technologies currently available and describe why challenging and extreme flow applications can be solved using it
Coriolis Mass Flowmeters have been available commercially for about 20 years
Over the past decade, they have been one of the fastest growing flow measurement technologies. Growth has been driven by a unique ability to directly measure mass as well as many other general advantages
For most critical measurements, mass or normalized volume is of interest – volume alone is insufficient for many applications
In the Mountains
On the Beach
Out in Space
Coriolis meter technology is offered by around a dozen suppliers, each having their own design. Here is a sample of some of the different types:
Parallel Straight Tube
All work using the same Coriolis Principle but different designs are more suited to specific applications; i.e. straight-through designs may be more suitable for hygienic applications
M = Mass of moving element (liquid or gas) in pipe
F = Coriolis force
v = velocity of mass moving
w = rotation speed / angular velocity
F = 2 * M * v * w
Measured time difference / phase shift (t) is proportional to flow
No ideal design possible – simplified considerations:
Semi-circular Measurement Tube
Carefully balanced oscillation system consisting of rods and cross bar counter weight
Flow Supply Section
Thick wall tubing required to meet pressure rating. Without Omega Tube torsion rod/cross bar system, it would not be possible to provide sufficient oscillation for reliable meter operation
Turbine and PD meters not ideal due to abrasive nature of fuel oil
Ultrasonic meters not accurate enough due to flow profile issues
Omega Tube Design can accommodate thick wall tube to meet pressure requirements while providing high accuracy across a range of 0.25 kg/min to 50 kg/min
The Omega Tube Design lends itself to variations in material of tube construction. Because of the torsion rod/mass weight design, tubes manufactured from exotic materials such as Tantalum can be accomodated without requiring meter redesign
Omega Tube Design Mass Flowmeters are resilient to extremes of temperature due to remote electronic mounting
the Mass Flowmetering Experts
For more information on Omega Tube Coriolis Mass Flowmeters, please come to the South Fork Instruments Table