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Table A1
123
At base conditions
of °C & bars
At sample gas conditions of °C & bars
Gas
Type
Mol.
Mass
M
γ
at sample
conds.
4
Z
s
5
ρ
s
true
6
V
F
7
Z
8
Z
F
9
E
F
10
Δ
F
%
11
E
1
12
Δ
1
%
13
E
2
14
Δ
2
%
15
ρ
s
ind.
Cal
X
xx x X
Cal
Y
yy E
2y
Y’
Sample
A
aE
1a
E
2a
A’
Sample
B
bE
1b
E
2b
B’
Sample
C
cE
1c
cC’
Column 2: Data is derived from page x.x or other suitable tables.
Column 3: Data is interpolated from Gas Tables (e.g. IUPAC) at SAMPLE GAS conditions.
Column 4: Data is interpolated from Gas Tables (e.g. IUPAC) at BASE GAS conditions.
Column 5: Calculated using
ρ
s
s
ss
PM
xT xZ
=
00831434.
Column 6: Calculated using
V
M
x
F
=−1 0000695
γ
.
Column 7: Calculated using Z=1-0.000238P for Nitrogen.
Z=1+P(0.00017+6E-05xM-1.13E-05xM²+7.2E-03xI) for CH
4
P is pressure in bars absolute,
I is volume/mole fraction of inert gases
Column 8: Calculated using Z
F
= Col 7 / Col 4
Column 9: Calculated using E
F
= Col 6 x Col 8
Column 10: Calculated using Δ
F
%= (1-Col 9)x100%
Column 11: E
1
= x or y or calculated for E
1a
,E
1b
or E
1c
(see Eqn. A10)
Column 12: Calculated using Δ
1
%= (Col 11-Col 9)x100%
Column 13: E
1
= x or c or calculated for E
2y
, E
2a
or E
2b
(see Eqn. A11)
Column 14: Calculated using Δ
2
%= (Col 13-Col 9)x100%
Column 15: Calculated using
ρ
s
ind
x=
+100
100
Col 14
Col 5
Eqn. A10
E
Xx
A
AXY y X x
AY X
a1
1
111
=−
−
−
−−−−
−
()( )[()()]
()
E
Xx
B
BXY y X x
BY X
b1
1
1
11
=−
−
−
−−−−
−
()
()[()()]
()
E
Xx
C
CXY y X x
CY X
c1
1
1
11
=−
−
−
−−−−
−
()
()[()()]
()
Eqn. A11
E
Xx
Y
YXC c X x
YC X
y2
1
111
=−
−
−
−−−−
−
()( )[()()]
()
E
Xx
A
AXC c X x
AC X
a2
1
111
=−
−
−
−−−−
−
()( )[()()]
()
E
Xx
B
BXC c X x
BC X
b2
1
111
=−
−
−
−−−−
−
()( )[()()]
()
Note: Use Eqn. A10 with methane/Nitrogen reference gases, Eqn. A11 for methane/sample gas C
as references.