Answer: Your question lacks some details below is the missing detail
a) Determine the net work output per unit mass (wnet). Use the PG model.
b)What would the answer be if the reheat were eliminated?
answer :
a) 278.173 kJ/kg
b) 205.21 kJ/kg
Explanation:
Given data :
T1 = 300 k
P1 = 0.1 MPa
rp ( pressure ratio ) = 9
T3 = 1000 k
intermediate reheating = 1000 K
a) Determine Work output per unit mass ( wnet )
wnet = [ mCp ( T3 - T2 ) + mCp ( T5 - T4 ) ] - [ mCp ( T6 - T1 ) ] ---- ( 1 )
where: mCp = 1.005 kJ/Kgk , T3 = 1000 k , T5 = 1000k , T4 = 730.59 k ( calculated value ), T2 = 562.03 K ( calculated value ) , T6 = 730.59 K , T1 = 300k
Input values into equation 1
wnet = 278.173 kJ/kg
b) wnet without reheat
= [ mCp ( T3 - T2 ) + mCp ( T4 - T1 ) ] ---- 2
T4 = 1000 k / 9^(1.4-1 / 1.4 ) = 533.776 k , T3 = 1000 k , T2 = 562.03 K , T1 = 300 k
input values back to equation 2
wnet = 205.21 kJ/kg
