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FLOW & LEVEL CONTROL
Some of the latest research being
performed at the Advanced Multiphase Flow Facility will further the
development of this critical technology
flowrate/velocity for a MPFM. They can be separated into two measurement methods: • Direct metering • Indirect metering Direct metering devices include Coriolis,
positive displacement and thermal mass flow meters. They are measurements performed explicitly of the object's characteristic to be measured. i.e. mass is directly measured and not inferred. The more common type of measurement method is indirect, occurring when a parameter is measured and then converted ‘indirectly’ to calculate the flow. Examples of indirect metering devices include ultrasonic, turbine, vortex, differential pressure and electromagnetic meters. There are numerous methods used for
determining the different phase fractions. The main methods used by commercially available multiphase flow meters are gamma ray absorption, electrical capacitance, electrical conductivity, microwave attenuation, microwave resonance and magnetic resonance. All of these different technologies have their
own advantages and disadvantages. Where one MPFM might be the perfect solution for one
FHS-OCT19-ROTECH.qxp:Layout 1 11/10/2019 15:53 Page 1
specific installation, another technology might be required due to differing flowrates, GVF, WLR or operating pressures. As such, it is imperative that an independent, knowledgeable expert is consulted, that has a proven track record in multiphase flow, regarding the appropriate selection of MPFMs. They should have a long- established history of expertise in multiphase flow and have performed research and consultancy with a whole host of operators for all types of multiphase flow meters. Some of the latest research being performed at our Advanced Multiphase Flow Facility will
further advance the development of this critical technology. Current research includes exploring the flow regimes that occur at extreme pressures and the use of multiphase flow meter diagnostics for in situ validation. The question now remains about what shape the next generation of multiphase flow meters will take? Will they be cheaper and less accurate but more commonly used? Only the future will tell.
TÜV SÜD National Engineering Laboratory
www.tuvsud.com/en-gb/nel
LHS 210 / 410
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Tel: +44 (0)1707 331111
info@welwyntoolgroup.co.uk |
www.welwyntoolgroup.com
JULY/AUGUST 2022 | PROCESS & CONTROL 19
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