A new correlation for the critical mass flux of natural gas mixtures

The calculation of the critical mass flux for natural gas mixtures is a complex process, requiring an accurate equation of state for such mixtures. A convenient correlation would remove the need for such a calculation. In this paper, two previous correlations are analysed and their limitations descr...

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Bibliographic Details
Published in:Flow measurement and instrumentation 2000-12, Vol.11 (4), p.265-272
Main Authors: Stewart, D.G., Watson, J.T.R., Vaidya, A.M.
Format: Article
Language:English
Subjects:
AGA8
Composition
Correlation
Critical flow
Equation of state
Equations of state of gases
Flux
Mixtures
Natural gas
Pressure effects
Thermal effects
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Summary:The calculation of the critical mass flux for natural gas mixtures is a complex process, requiring an accurate equation of state for such mixtures. A convenient correlation would remove the need for such a calculation. In this paper, two previous correlations are analysed and their limitations described. Neither correlation covers the range of compositions likely to be found in the field. Furthermore these correlations are based on older equations of state. A new correlation has been developed that improves significantly on the previous two. The new correlation covers a greater composition range and is valid in the temperature range 270–330 K at pressures up to 12 MPa. The new correlation is based on mass flux values calculated using the AGA8-92 equation of state for natural gas mixtures. The mean error for the total range of temperature, pressure, and composition is 0.075% compared with values calculated using AGA8.
ISSN:0955-5986
1873-6998
DOI:10.1016/S0955-5986(00)00025-X