
User's Guide _______________________________________________________________________
140 __________________________________________________________________ M210762EN-A
Mixing ratio:
w
w
Pp
P
x
-
99.621 ⋅=
(2)
Absolute humidity:
P
a
w
⋅= 68.216
(3)
Enthalpy:
Th ⋅
⋅
⋅
= 5.2)00189.001.1()15.273(
(4)
The water vapor saturation pressure P
ws
is calculated by using two
equations (5 and 6):
∑
=
−=Θ
3
oi
i
i
TCT
(5)
where:
T = temperature in K
C
i
= coefficients
C
0
= 0.4931358
C
1
= -0.46094296 × 10
-2
C
2
= 0.13746454 × 10
-4
C
3
= -0.12743214 × 10
-7
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