Question

C50. A mass of wet steam at
temperature 165 °C is expanded at
constant quality 0.8 to pressure 3bar.
It is then heated at constant pressure
to a degree of superheat of 66.5 °C.
Find the enthalpy and entropy
changes during expansion​

Answer 1

Answer:

p1=7bar

t1 165

Explanation:

for steam table

h1=hf+0.8h

= 2349jjkg

s1=165

t2 =133.t

h2= 561.4+0.8×2163.2

= 2292kg

enthalpy=57kjkg