In case of wet steam, the actual entropy can be calculated with the vapor quality, x, and the specific entropies of saturated liquid water and dry steam. Thermal Engineering

## Specific Entropy of Wet Steam

## Specific Entropy of Wet Steam

Similarly, the specific entropy of saturated liquid water (x=0) and dry steam (x=1) can be picked from steam tables. In case of wet steam, the actual entropy can be calculated with the vapor quality, *x,* and the specific entropies of saturated liquid water and dry steam:

*s*_{wet}* = s*_{s}* x + (1 – x ) s*_{l}* ** *

*where*

*s*_{wet}* = entropy of wet steam (J/kg K)*

*s*_{s}* = entropy of “dry” steam (J/kg K)*

*s*_{l}* = entropy of saturated liquid water (J/kg K)*

References:

**Reactor Physics and Thermal Hydraulics:**
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