TITLE.PM5

184 ENGINEERING THERMODYNAMICS

dharm

/M-therm/Th4-5.pm5

T 2

Ta

T 1

pa

p 1

p 2 2

p

v 12 = v v

a

1

(a)

vv 12 = p 2

a

p 1

s 1 s 2

s

T 1

T 2

T

1

2

(b)

Also

v

v

T

g Ts

sup 2 sup

2

2

2

=

∴

T

T

xv

s v

g

g

sup 2

2

1

2

=^1

...(4.69)

vg 2 and Ts 2 can be found from the steam tables corresponding to pressure p 2 and then Tsup 2

can be calculated by using the above equation. When the final condition is known, the change in all
other properties can be found easily.