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

 

Tags: Equations for Steam Equations for Coefficient Equations for Enthalpy Equations for Entropy Equations for Specific Volume