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Title: An Update On V-Cone Meter Wet Gas Flow Metering Research
Author: Richard Steven, Tom Kegel, Charles Britton
Source: Flomeko 2005
Year Published: 2005
Abstract: With the increasing importance of wet gas flow metering to industry, the Differential Pressure (DP) meter wet gas flow correlations are being increasingly utilised. Currently little information exists regarding the applicability of such correlations beyond the limits of the data sets used to create them. In particular little is known about the repeatability of a DP meter with wet gas flows, meter size and liquid property effects on the validity of the DP wet gas correction factors. In 2001 NEL tested a 6 schedule 80, 0.75 Beta Ratio V-Cone meter with a N2 / kerosene wet gas flow as part of the UK governments Department of Trade and Industry (DTI) funded Flow Programme. In 2002 McCrometer and NEL jointly presented analysis of this data at the North Sea Flow Measurement Workshop (NSFMW) 1. The parameters that affected the over-reading (i.e. the positive error induced by the presence of liquid with the gas flow) were shown and a wet gas flow correlation was offered. For a known liquid mass flow rate or liquid to gas flow rate ratio the meters gas prediction was to 2% with a few outliers. In 2003 McCrometer presented results of repeat tests at NEL and a single wet gas data set from a 4 schedule 80, 0.75 Beta Ratio V-Cone meter tested with natural gas (NG)/ decane at CEESI 2. The V-Cone meter was shown to be repeatable and the results from CEESI were similar to those of NEL. However, in general, the question of what effect meter size and liquid phase properties have on DP meter wet gas overreadings is largely unanswered, even though the applicability of published correlations in different applications is a very relevant industrial issue.

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