1. Analysis of Rankine Cycle: Techno-economically Feasible Thermodynamic Model
P M V Subbarao
Professor
Mechanical Engineering Department
An appropriate selection of operational parameters & Processes

2. Optimal Design of Vapour Power Plant

3. pmax=10MPa

4. pmax=10MPa

5. hturb,in
hturb,out

6. If Carnot Studies The Rankine Cycle !
smin
smax

7. Carnotization of Rankine Cycle
Equivalent Carnot cycle of Rankine Cycle
Heat Addition in Steam Generator, qin
Mean Effective Temperature of heat addition for equivalent isothermal process or entropy averaged temperature

8. Equivalent Carnot Model of Rankine Model
Heat rejection in Steam Condenser, qin
Mean Effective Temperature of heat rejection for equivalent isothermal process.

9. Equivalent Carnot Model of Rankine Model
Tm,in
Tm,out
smin
smax

10. Analysis of Equivalent Carnot Model
Net work out put =
Heat Input =
Efficiency,

11. Parametric Study of Rankine Cycle
23.5MPa
22MPa
18MPa
10MPa
6MPa
D.S.S.
3MPa h
1MPa
Tmax

12. Ideal Rankine Cycle : P-h Diagram
pmax=17Mpa
h=42.05%
Tequi=284.40C
Tmax=5500C 1 2 3 4 1 2 3 4
pmax=5Mpa
h=37.8%
Tequi=246.30C

13. Selection of Optimum Boiler Pressure
Tmax = 450 oC h
Pressure, MPa

14. Selection of Optimum Boiler Pressure
Tmax = 450 oC x
Pressure, MPa

15. Selection of Optimum Boiler Pressure
Tmax = 450 oC xh
Pressure, MPa

16. Progress in Rankine Cycle
Year
1907
1919
1938
1950
1958
1959
1966
1973
1975 MW 5 20 30 60
120
200
500
660
1300
p,MPa
1.3
1.4
4.1
6.2
10.3
16.2
15.9
24.1
Th oC
260
316
454
482
538
566
565
Tr oC --
FHW 2 3 4 6 7 8
Pc,kPa
13.5
5.1
4.5
3.4
3.7
4.4
5.4
h,%
~17
27.6
30.5
35.6
37.5
39.8
39.5 40

18. qin
wnet

19. qin
wnet

21. htur.,in
htur.,out

22. htur.,in
htur.,out

24. Selection of Optimum Boiler Pressure
Tmax = 450 oC xh
Pressure, MPa

25. Parametric Study of Rankine Cycle
22MPa
23.5MPa
18MPa
10MPa
6MPa
w, kJ/kg
3MPa
1MPa
D.S.S.
Tmax, 0C
450
550
650
150
250