Comparison of the two-phase mass flow coefficient and the over-reading for wet gas flow metering with DP meters

摘要

Highlights?Analyze the difference between the two-phase mass flow coefficient and the over-reading.?Derive the basic form of wet gas correlations based on the two-phase mass flow coefficient.?Propose an alternative as well as better approach to correct the liquid-induced prediction error of the gas flow rate in wet gas with DP meters.AbstractA DP meter with a wet gas correlation is a widely applied technology for metering wet gas flow. The over-reading (OR) is historically the most used parameter for establishing the wet gas correlation. Recently, we proposed a new parameter termed the two-phase mass flow coefficient (K) and whereby new wet gas correlations were developed. In the present study, the comparison ofKandORis conducted. By applying the separated flow model, the basic form of the wet gas correlation based onKis derived, and meanwhile the effect of influential parameters onK