Vortex Flow Meters
Vortex Flow Meters
(OP)
Dear Engineers
Recently I read an article about flow metering, which stated the following:
1) 'Coriolis meters are not recommended for wet gas application' <<is this because it is dependent on the density of the gas and composition, hence fluctuating water content can affect the readings?
2) 'Vortex meters have the least problems with wet gas compared to other measuring principles, and only measure the gas component in wet gas application' <<< how is a vortex meter reading not effected by the water content in wet gas applications?
Any relavent information would be welcome
Regards
Recently I read an article about flow metering, which stated the following:
1) 'Coriolis meters are not recommended for wet gas application' <<is this because it is dependent on the density of the gas and composition, hence fluctuating water content can affect the readings?
2) 'Vortex meters have the least problems with wet gas compared to other measuring principles, and only measure the gas component in wet gas application' <<< how is a vortex meter reading not effected by the water content in wet gas applications?
Any relavent information would be welcome
Regards





RE: Vortex Flow Meters
Your statement on vortex meters must be from a vendor as no data supports this conclusion see: http:
The quest for an (industry acceptable) two phase meter shall continue......
RE: Vortex Flow Meters
RE: Vortex Flow Meters
My preference for rapidly changing, slugging fluids is the V-Cone meter. It doesn't do all that much better job on slugging flows than the mass flow meters, but it seems to recover faster from a slug.
David
RE: Vortex Flow Meters
Assuming the temperature and pressure of the gas constant in both cases, higher moisture content in a gas flow should cause the Coriolis to read higher volumetric flowrate than a denstiy compensated Vortex. However, I don't know what is the use of that.
RE: Vortex Flow Meters
I obtained that info from the Canadian process Equipment & Control news website, here is the link:
http://ww
Yes I looked at V-Cone meters, in perticular the Roxar wet gas and the MRM V-Cone. The Roxar one claims to use microwave technology to measure the water content, the condensate is estimated by a ratio input. I am told they can handle wet gas applications and the sales engineer claims a slug will not effect the instrument.
I have looked at Coriolis meters too, but there is none suited for pipe sizes >6". There are some companies working on larger 12" ones, but these are still on the drawing board. I have noted some use the coriolis in parallel to cater for larger pipe sizes, but so far no vendors seem to recommend them for a 24" line with wet gas.
RE: Vortex Flow Meters
The coriolis meter measures mass and only mass. In the electronics it can take the input signal and perform time based calculations to arrive at an average stream density. It can then use that desity to get a volumetric flow (at flowing conditions). You still need to perform calculations to get back to standard conditions and thats where the rub comes from because to adjust back to standard, you need to know the composition.
RE: Vortex Flow Meters
RE: Vortex Flow Meters
The Liquids content is <0.5%, this can be handled by some meters in the market but they do not meet the straight length requirement, pipe size and/or low pressure operation requirement (<15bara)
The V-Cone is the only one i have seen that meets all of these, but I was just curious as to what i had read in regard to vortex and coriolis meters.
RE: Vortex Flow Meters
Although somewhat different than the V-Cone, a few other head type flow meters like the Fluidic Techniques FlowPak also limit the straight run requirements. The head during a slug is likely outside the normal range. However modern dp transmitters are generally unaffected by actual dp well beyond their calibrated range.
RE: Vortex Flow Meters
RE: Vortex Flow Meters