STEAM TURBINE CALCULATION SHEET
Logo
Page :
1
STEAM CONSUMPTION No . 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Des i g n at i o n
Qu an t i t y
No t e an d ad d i t i o n al i n f o r m at i o n
ADMISSION TURBINE C URTIS+REAC TIO ION N C ontrol stag age e : C urtis CONDENSING TURBINE
Turbine type
REQUIRED CONDITION Steam flow available, m N pi ti Admitted pressure Admitt itted steam mass flow, ma ma po
ton/hr RPM bar A C bar A ton/hr bar A
N o r m al 15 7000 100 550 40 5 0.12
Impulse
R a t ed
m
Reaction
Admitted steam ma
mR
STEAM DATA hi hos Δhs Gove overno rnor val valve ve fact factor or Δhs' hos' pi' ti'
kJ/kg kJ/kg kJ/kg
3490 2155 1335 0.97 1295.0 2195.1 80 540
See steam Mollier diagram See steam Mollier diagram = hi - hos Multi valve 0.97, single valve 0.93 = Gov. vlv. Factor x Δhs (equation 11) See diagram
kJ/kg kJ/kg bar A C
25 26 27 28 29 30
vi'
m /kg /kg
0.0444
See steam table at pi' and ti'
poIMP
bar A
40
31
hos'IMP
kJ/kg
3265
32 33 34 35 36
Head, Δh'IMP Calc. diameter at best eff. Selected dia., D Peripheral velocity, U Head coefficient, μS
kJ/kg mm mm m/s
225 506.75 500 183.6 6.7
37
hos'IMP
kJ/kg
3265.0
=hi - Δh'IMP
38
Efficiency, η05
0.71
Figure 12
39 40 41 42 43 44 45 46
Entrance area factor, A
3
CALCULATION
Control Stage
I xε Nozzle heigh ight, I ε Efficiency factor FI Efficiency factor Fe Efficiency, ηIMP
Equation in fig. 9 Decide D, smaller than calculated
Equation 1
34 mm
0.725 25 0.029 0.93 0.799 0.53
Equation 15 but replace P by (Δhs' x m x η05 )
Select I so that ε within the range below 0.015 - 0.45 for welded, min. 0.07 reaming Figure 13 Equation in figure 13 = η05 x FI x Fε
STEAM TURBINE CALCULATION SHEET
Logo
No.
Designation
Quantity
ΔheIMP
kJ/kg
118.4
= η x ΔhIMP
2 3
heIMP
kJ/kg C
3371.6 470
See steam Mollier diagram
m /kg
0.0825
See steam table
3
4
Exhaust specific volume, vo
5
PLOSS
kW
50.19
Equation 5
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
Control stage power, PIMP
kW
443.3
= (m x ΔheIMP / 3.6) - PLOSS
ton/hr kJ/kg kJ/kg kJ/kg mm mm mm
20.0 3371.6 2235 1136.55 720 630 90 8 0.40 17 264.3 365.5 0.72 66.9
Reaction Stages Reaction stage steam flow, mR hi hos' ΔhsR Pitch diameter, D Base diameter Average blade height, I D/I S/I Calculated number of stages Peripheral velocity, U Steam velocity, C Velocity ratio, U/C ΔhsRSTG
m/s m/s kJ/kg
22
ηR
23
ΔheR
kJ/kg
966.07
24 25 26 27
heR
kJ/kg
2405.5 0.940 2720.0 0.990
28 29
Reaction stages power, PR
kW
5314.6
30
Reaction + impulse power
kW
5757.971
31
Mechanical efficiency, ηm BHP
See fig. 11, at required speed, select pitch and base diameter
=0.2 LP blade,=0.4 MP and =0.6 HP Eq. 12a (integer number)
0.85
X Wet enthapy , Hwet Wet eficiency, ηWET Reaction stages efficiency, η
32 33 34 35 36
2
Note and additional information
1
Exhaust temperature, to
Page :
kJ/kg
0.84
Equation 7.
= ηR x ηWET = mR x ΔhsR x η = PR + PIMP
0.983 kW
5661.5
= (PR + PIMP ) x ηm
STEAM TURBINE CALCULATION SHEET
Logo
A
B
D
B1
hos'=2899 hos=2890
C
Page :
3
STEAM TURBINE CALCULATION SHEET
Logo
Page :
1
STEAM CONSUMPTION No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Designation
Quantity
Note and additional information
ADMISSION TURBINE RATEAU+REACTION Control stage : Rateau CONDENSING TURBINE
Turbine type
Impulse
REQUIRED CONDITION Steam flow available, m N pi ti Admitted pressure Admitted steam mass flow po
ton/hr RPM bar A C ton/hr bar A
STEAM DATA hi hos Δhs Governor valve factor Δhs' hos' pi' ti'
kJ/kg kJ/kg bar A C
24 25 26 27 28
vi'
kJ/kg kJ/kg kJ/kg
Normal 45 6000 100 550 40 10 0.12
Reaction
Rated
m
Admitted steam ma
mR
3490 2155 1335 0.97 1294.95 2195.05 80 540
See steam Mollier diagram, point A. See steam Mollier diagram, point C = hi - hos Multi valve 0.97, single valve 0.93 = Gov. vlv. Factor x Δhs (equation 11) See diagram, point B1
m /kg
0.0444
See steam table at pi' and ti'
poIMP
bar A
40
29
hos'IMP
kJ/kg
3265
30 31 32 33 34
Head, Δh'IMP Selected dia., D Peripheral velocity, U Number of stage, z Head coefficient, μS
kJ/kg mm m/s
225 700 220.3 2 2.3
35
Efficiency, η05
36 37 38 39 40 41 42 43
Entrance area factor, A
44 45
ΔheIMP
3
CALCULATION
Control Stage
I xε Nozzle height, I ε Efficiency factor FI Efficiency factor Fe Efficiency, ηIMP
Fig. 10, near cross poit N and red dot line
Equation 1
0.82 34 mm
0.577 25 0.023 0.97 0.891 0.706
Equation 15 Select I so that ε within the range below 0.015 - 0.45 for welded, min. 0.07 reaming Figure 13 Equation in figure 13 = η05 x FI x Fε
kJ/kg
158.8
= ηIMPx Δh'IMP
STEAM TURBINE CALCULATION SHEET
Logo
No.
Designation heIMP
Quantity
Exhaust temperature, to
kJ/kg C
3
Exhaust specific volume, vo
m /kg
0.08
4
PLOSS
kW
130.59
Equation 5
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Control stage power, PIMP
kW
1854.9
= (m x ΔheIMP / 3.6) - PLOSS
Pitch diameter, D Base diameter Average blade height, I D/I S/I Calculated number of stages Peripheral velocity, U Steam velocity, C Velocity ratio, U/C ΔhsRSTG
ton/hr kJ/kg kJ/kg kJ/kg mm mm mm
55.0 3331.2 2220 1111.16 750 630 120 6 0.40 21 236.0 325.2 0.73 52.9
21
ηR
22
ΔheR'
kJ/kg
977.82
23 24
heR
kJ/kg
2353.3 0.900 2730 0.981
Than make steam process in Mollier diagr. See steam Mollier diagram See steam table
Reaction Stages Reaction stage steam flow, mR hi hos' ΔhsR
m/s m/s kJ/kg
See fig. 11, at required speed, select pitch and base diameter
=0.2 LP blade,=0.4 MP and =0.6 HP Eq. 12a (integer number)
0.880
26
X Wet enthalpy Wet eficiency, ηWET Reaction stages efficiency, η
27
Reaction stages power, PR
kW
14651
= mR x ΔhsR x η
28
Reaction + impulse power
kW
16506
= PR + PIMP
29
Mechanical efficiency, ηm
25
30 31 32 33 34
2
Note and additional information
1 2
3
3331.2 450
Page :
BHP
kJ/kg
0.86
= ηR x ηWET
0.995 kW
16424
= (PR + PIMP ) x ηm
STEAM TURBINE CALCULATION SHEET
Logo
A
B
D
hos'=2899 hos=2890
C
B1
Page :
3