Description
Calculate the saturation vapor pressure \(P_{ws}\)(?) with respect to water, as a function of temperature \(t\)(K) and pressure \(p\)(?).
Used in virtual temperature calculation through Aspen V3.4.4. No longer used.
Formula
$$
p_s = 1013.246 \\
t_s = 373.16 \\
e_1 = 11.344(1-t/t_s) \\
e_2 = -3.49149(t_s/t - 1) \\
f_1 = -7.90298(t_s/t - 1) \\
f_2 = 5.02808\log(t_s/t) \\
f_3 = -1.3816(10^{e_1}-1)10^{-7} \\
f_4 = 8.1328(10^{e_2}-1)10^{-3} \\
f_5 = \log(p_s) \\
f = f_1 + f_2 + f_3 + f_4 + f_5 \\
e_s = 10^f \\
P_{ws} = 0.62197\frac{e_s}{p-e_s}
$$
Source
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