# Wet Steam

Written by Jerry Ratzlaff on . Posted in Thermodynamics

## Wet Steam

Wet steam contains both water and steam held in suspension just below the satutation temperature

### wet steam dryness fraction FORMULA

$$\large{ \zeta = \frac { w_s } { w_w \; + \; w_s } }$$

Where:

$$\large{ w_s }$$ = mass of steam

$$\large{ w_w }$$ = mass of water

$$\large{ \zeta }$$  (Greek symbol zeta) = dryness fraction

### wet steam enthalpy FORMULA

$$\large{ h_t = h_s \; \zeta \; + \; \left( 1 \; - \; \zeta \right) h_w }$$

Where:

$$\large{ h_s }$$ = enthalpy of dry steam

$$\large{ h_t }$$ = enthalpy of wet steam

$$\large{ h_w }$$ = enthalpy of saturated water of concensate

$$\large{ \zeta }$$  (Greek symbol zeta) = dryness fraction

### wet steam ENTropy FORMULA

$$\large{ s_t = s_s \; \zeta \; + \; \left( 1 \; - \; \zeta \right) s_w }$$

Where:

$$\large{ s_s }$$ = entropy of dry steam

$$\large{ s_t }$$ = entropy of wet steam

$$\large{ s_w }$$ = entropy of saturated water of concensate

$$\large{ \zeta }$$  (Greek symbol zeta) = dryness fraction

### wet steam FLOW COEFFICIENT FORMULA

$$\large{ C_v = C_{vs} \; \dot \; \; \zeta ^ { \frac { 1 } { 2 } } }$$

Where:

$$\large{ C_v }$$ = saturated wet steam flow coefficient

$$\large{ C_{vs} }$$ = saturated flow coefficient

$$\large{ \zeta }$$  (Greek symbol zeta) = dryness fraction

### wet steam specific volume FORMULA

$$\large{ \upsilon_t = \upsilon_s \; \zeta }$$

Where:

$$\large{ \upsilon_s }$$ = enthalpy of dry steam

$$\large{ \upsilon_t }$$ = specific volume of wet steam

$$\large{ \zeta }$$  (Greek symbol zeta) = dryness fraction