Saturation vapor pressure (Pws) is the equilibrium water vapor pressure in a closed chamber containing liquid water. It is a function only of temperature, and it indicates the maximum amount of water that can exist in the vapor state.
Water vapor saturation pressure (Pws) is calculated with the following 2 formulas:
where
- T
- Temperature in K
- Ci
- Coefficients
- C0
- 0.49313580
- C1
- -0.46094296 * 10-2
- C2
- 0.13746454 * 10-4
- C3
- -0.12743214 * 10-7
where
- bi
- Coefficients
- b-1
- -0.58002206 * 104
- b0
- 0.13914993 * 101
- b1
- -0.48640239 * 10-1
- b2
- 0.41764768 * 10-4
- b3
- -0.14452093 * 10-7
- b4
- 6.5459673