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

 

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