# Wet Steam

Written by Jerry Ratzlaff on . Posted in Thermodynamics

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

## wet steam dryness fraction FORMULA

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

Where:

$$\zeta$$ (Greek symbol zeta) = dryness fraction

$$w_s$$ = mass of steam

$$w_w$$ = mass of water

## wet steam enthalpy FORMULA

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

Where:

$$h_t$$ = enthalpy of wet steam

$$h_s$$ = enthalpy of dry steam

$$\zeta$$ (Greek symbol zeta) = dryness fraction

$$h_w$$ = enthalpy of saturated water of concensate

## wet steam ENTropy FORMULA

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

Where:

$$s_t$$ = entropy of wet steam

$$s_s$$ = entropy of dry steam

$$\zeta$$ (Greek symbol zeta) = dryness fraction

$$s_w$$ = entropy of saturated water of concensate

## wet steam specific volume FORMULA

$$\upsilon_t = \upsilon_s \; \zeta$$

Where:

$$\upsilon_t$$ = specific volume of wet steam

$$\upsilon_s$$ = enthalpy of dry steam

$$\zeta$$ (Greek symbol zeta) = dryness fraction

## wet steam FLOW COEFFICIENT FORMULA

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

Where:

$$C_v$$ = saturated wet steam flow coefficient

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

$$\zeta$$ (Greek symbol zeta) = dryness fraction