Implicit Z-factor Correlations @model for the natural gas in the wide range of pseudo-reduced temperature 1.05 \leq T_{pr} \leq 3 and pseudo-reduced pressure 0.2 \leq P_{pr} \leq 15:
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where
Z | Z-factor | ||||
T | fluid temperature | T_{pr} = T/T_{pc} | pseudo-reduced temperature | T_{pc} | pseudo-critical temperature |
P | fluid pressure | P_{pr} = P/P_{pc} | pseudo-reduced pressure | P_{pc} | pseudo-critical pressure |
and
A_1 = 0.3265 | A_2 = -1.070 | A_3 = - 0.5339 | A_4 = 0.01569 | a_5=0.000002 | a_6=-0.004693 | a_7=0.096254 |
a_8=0.166720 | a_9=0.966910 | a_{10}=0.063069 | a_{11}=-1.966847 | a_{12}=21.0581 | a_{13}=-27.0246 | a_{14}=16.23 |
a_{15}=207.783 | a_{16}=-488.161 | a_{17}=176.29 | a_{18}=1.88453 | a_{19}=3.05921 |
See also
Natural Science / Physics /Thermodynamics / Z-factor / Z-factor Correlations @model
Reference