Question

Determine the specific enthalpy of wet steam at a pressure of 70 kN m-2 and having a dryness fraction of 0.85.

Answer 1

$H=C_p+\frac{pmr}{T},$ $c_p=\frac{C_p}{m},$

$h=\frac Hm=c_p+\frac{pr}{T},$

$h=1007+\frac{70000\cdot 0.85}{393}=1158~\frac{J}{kg}.$