Page 1 of 29
4600 MW SEL IPP
Jharsuguda
Technical Diary
Turbine
Page 2 of 29
TABLE OF CONTENTS
SECTIONS
1.0 TURBINE AND AUXILIARIES ..................................................... 3
1.1 TECHNICAL SPECIFICATION-MAIN TURBINE ............................. 4
1.2 DEFINITION OF START MODE OF STEAM TURBINE .................... 7
1.3 TECHNICAL PARAMETER OF HP BYPASS SYSTEM ...................... 8
1.4 TECHNICAL PARAMETER OF LP BYPASS SYSTEM ....................... 9
1.5 CRITICAL ROTATING SPEED ..................................................... 9
1.6 LUBRICATED OIL SYSTEM ...................................................... 10
1.7 TURNING GEAR MOTOR ........................................................ 14
1.8 EH OIL SYSTEM ..................................................................... 14
1.9 SPECIFICATION OF TDBFP ..................................................... 15
1.10 OIL PUMP PERFORMANCE SPECIFICATION .............................. 15
1.11 MOTOR OPERATED FEED WATER PUMP .................................. 15
1.12 HP HEATERS.......................................................................... 17
1.13 LP HEATERS .......................................................................... 18
1.14 DE-AERATORS ...................................................................... 18
1.15 SHAFT SEALING SYSTEM ........................................................ 19
1.16 CONDENSER ......................................................................... 20
1.17 WATER RING TYPE VACCUM PUMP ......................................... 21
1.18 CIRCULATING WATER SYSTEM ............................................... 21
1.19 COOLING WATER TOWER ...................................................... 22
1.20 INTEGRATED PUMP HOUSE SYSTEM ....................................... 22
1.21 MAIN PARAMETER LIMITS ...................................................... 23
Page 3 of 29
1.0 TURBINE AND AUXILIARIES
Page 4 of 29
TURBINE AND AUXILIARIES
1.1 TECHNICAL SPECIFICATION-MAIN TURBINE
The turbine type is: sub-critical, primary reheating .single shaft .three
cylinder and four-flow, and condensing type and its design rated power is
600MW, which characteristics include: Combination of the HP & MP cylinder,
double-flow reverse arrangement of the LP cylinder. There is internal flange
bolt heating system in the proper, whose direction is anti-clockwise from
the head to motor. Eight steam extractions are designed, which supply 3 HP
heaters, 1 de-aerator and 4 LP heaters. Two HP automatic main stop valve
and four HP governing valve are arranged below the operation layer of
head's front and two MP combined steam valve which are arranged
symmetrically.
In turbine generator shaft unit, in addition that #1, 2 bearings adopt the
tilting-pad ones, others adopt elliptic bearings. Shaft vibration measuring
equipment are installed in the X, Y direction of every bearing upper tile,
lower tile is equipped with temperature measuring equipment. Thrust bear
lies in the #2 bearing seat between the HP & MP cylinder and LP cylinder and
adopt tilted plane dual-thrust disc structure.
HP & LP cylinder's expansion dead point lies in #2 bearing pedestal while LP
cylinder A and B in neighborhood of their own center. The horizontal key in
the dead point limit the axial displacement of the steam cylinder. At the
same time, there are portrait keys set in back and forth of the portrait
centerline between the front bearing tank and two LP cylinders to lead steam
cylinder to expand along the shaft and limit its horizontal deviation.
Two steam-driven variable speed feed-water pumps of 50% of capacity and
one electric stable speed feed-water pump of 50% of capacity are designed
in the unit feed water system. Two steam source including MP and LP are
designed in small turbine and it can impulse with auxiliary steam.
Condenser is designed to double-shell, double back pressure and single
pass, which can operate under the working conditions including unit max
output, circulating cooling water temperature 38C and back pressure less
than 18.6 kPa.
The design start mode of the unit is MP cylinder mode. Also HP cylinder can
be adopted, as the bypass system is not put into operation. We should pay
Page 5 of 29
attention to the swing condition of HP exhaust check valves when it impulse.
Bypass system adopts two-stage series connection bypass system and it has
MP & HP combined start, MP cylinder start and protection functions.
Sl No Name Related parameters
1 Unit model N60016.7/538/5383
2 Unit type Sub-critical, primary reheating, single shaft, three
cylinders, four-flow condensing steam turbine
3 Unit nameplate power
/maximum continue
output
600MW
4 Rated rotating speed 3000 r/min
5 Rotating direction Anticlockwise
6 Design cooling water
temperature of the
condenser
35.6 C
7 Through-flow stages Total 42 stages
HP cylinder: 1 governing stage + 8 pressures stages
MP cylinder: 5 pressure stages
LP cylinder: 2x2x7pressure stages (2 LP cylinder)
8 Steam matching way Composite governing (nozzle governing +
expenditure governing)
9 Rated initial steam
pressure
16.67 MPa
10 Rated initial steam
temperature
538 C
11 Rated exhaust pressure
of HP cylinder
3.82 MPa
12 Rated reheat steam
inlet pressure
3.439 MPa
13 Rated reheat steam
inlet temperature
538C
14 Rated steam inlet flow
of the initial steam
1863.75 t/h
15 Max steam inlet flow of
the initial steam
2028.0 t/h
Page 6 of 29
16 Rated steam inlet flow
of the reheat steam
1585.974 t/h
17 Rated exhaust pressure 10.2 KPa (9.1KPa /11.4KPa)
18 Height of the end blade 851 mm
19 Design cooling water
temperature
35.6 C
20 Regenerative stages of
feed-water
3 stages HP heater+1deaerator+ 4stages LP heater
21 Rated feed-water
temperature
276.6 C < under max condition 282.2 C)
22 Steam turbine
performance guarantee
Guarantee power: (TMCR) 600MW
VWO condition inlet steam flow 2028t/h
23 Load limit condition
when HP heater stop
running
shutdown 600 MW; 1,2,3 shutdown 600MW;
24 Load limit condition
(reference value) when
LP heater stop running
5&6 shutdown540 MW; 6&7 shutdown 540MW ; 7&8
shutdown 540MW; 5,6 & 8shutdown 480MW; 6,7 & 8
shutdown 480MW; 5,6,7 & 8 shutdown 420MW
25 Condition of auxiliary
steam
600MW
26 Height of the operation
layer
13.7m
27 Max lifting height 8.846m
8.926m
28 Bypass system capacity 60% BMCR
29 Start-up and operating
mode
Stable-sliding-stable operating mode
30 Range of variable
pressure operating
40% - 90%
31 Change rate of the
variable and stable
pressure
class load changes 10% rated output/min
equal load changes below 50%3% rated output/min
over 50%5% rated output/min
below 30% 2%/min
Permitted change range of load between 60% and
100% is 20%/min
32 Normal value of the
shaft vibration
0.076mm
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33 Permitted value of the
critical rotating speed
of shaft vibration
0.15mm
34 Bearing vibration max
value when at critical
speed
0.08mm
35 Max permitted back-
pressure value
18.6 kPa (a)
36 The release blasting
pressure of the LP
cylinder exhaust
diaphragm valve
34.3 kPa(g)
37 Max permitted exhaust
temperature of the LP
cylinder
Page 8 of 29
load step 10% THA 12000
times
0.001
1.3 TECHNICAL PARAMETER OF HP BYPASS SYSTEM
Technical parameter
name
unit design
conditio
n
Cold
start
Warm
start
hot start Very
hot
start
HP
steam
bypass
valve
inlet steam
pressure
MPa(a) 17.5 6.3 8.8 9 13
inlet steam
temperature
C 541 390 420 445 380
inlet steam
flow
t/h 1236 290 290 330 380
outlet steam
pressure
MPa(a) 4.655 1.2 1.2 1.2 1.2
outlet steam
temperature
C 336.4 290 300 310 320 *
outlet steam
flow
t/h 1434.07 303.89 305.9 352.53 416.57
Inlet/outlet
pipe design
pressure
MPa(g) 17.5/4.655
inlet/outlet
pipe design
temperature
C 541/336.4
HP
water
spray
control
valve
calculation
pressure
MPa(a) 24 23.98 23.98 23.96 23.98 20.12
calculation
temperature
C 190 111.00 111.00 111.00 111.00 161.30
calculation
flow
t/h 198.07 13.89 15.09 22.53 36.07 206.43
design
pressure of
temperature
releasing water
pipe
MPa(g) 24
Page 9 of 29
design
temperature of
temperature
releasing water
pipe
C 190
1.4 TECHNICAL PARAMETER OF LP BYPASS SYSTEM
Technical parameters name unit Design
conditio
n
Cold
start
Warm
start
Hot
start
Very
hot
start
LP
steam
bypass
valve
inlet steam pressure MPa (a) 4.189 1.10 1.10 1.10 1.10
inlet steam temperature C 541 345 400 420 485
inlet steam flow t/h 2 x
717.04
2 X
151.95
2 x
152.55
2 x
176.27
2 X
208.04
outlet steam pressure MPa (a) 0.6 0.6 0.6 0.6 0.6
outlet steam temperature C 160 160 160 160 160
outlet steam flow t/h 2 x
938.06
2 x
174.98
2 x
182.69
2 x
214.05
2 X
264.05
inlet/outlet pipe design
pressure
MPa(g) 4.189/1.6
Inlet/outlet pipe design
temperature
C 541/160
LP
water
spray
control
valve
Calculated pressure MPa(a) 3.1 3.1 3.1 3.09 3.09
Calculated temperature C 49.4 49.4 49.4 49.4 49.4
Calculated flow t/h 2 X
219.02
2 X
23.03
2 X
30.14
2 X
37.78
2 X 56.01
Design pressure of the
attemperating water pipe
MPa(g) 4.0
Design temperature
attemperating water pipe
C 50
1.5 CRITICAL ROTATING SPEED
Sl No Rotor first-stage critical speed
(r/min)
second-stage critical speed
(r/min)
shaft design
value
design value
of the single
shaft
shaft system
design value
design value
of the single
shaft
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1 MP & HP rotor 1722 1621 >4000 >4000
2 LP A rotor 1839 1723 3521 >4000
3 LP B rotor 1903 1750 >4000 >4000
4 Generator rotor 984 1070 3400 3338
1.6 LUBRICATED OIL SYSTEM
Main oil tank
type set-mounted volume Max 43.8 m3 / operating
34.9m3
oil model oil 32 exterior
dimensions
7250 x 3360 x 2300 mm
Gas-exhausting of the oil tank
fan model AP(V)0350-0200-1 flow 1410 m3/hr
full pressure 3507 Pa rotating speed 2900 r/min
motor power 3kW manufacturer --
electric motor
model
YB2-100L-2 Power 3kW
voltage 415 V Current A
insulation rank F Rotating speed 2900 r/min
protection rank IP55 Manufacture
separator model M519x02.007 separator flow 1500 m3/h
separator origin
Main oil pump
type Spindle-driven
centrifugal pump
outlet water
pressure
1.372MPa
flow L/min inhalation
pressure
0.098 - 0.147 MPa
rotating speed 3000 r/min manufacturer
Oil turbine-driven booster pump (BOP)
drive pressure 1.372MPa outlet pressure 0.392 MPa
flow L/min
Start-up oil pump (MSP)
type OVCV flow 6300 L/min
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pressure 22.4m/0.192MPa rotating speed 1500 r/min
motor model power 45 kW
voltage AC 415V current A
rotating speed 1450 r/min insulation class F
Motor of the IC auxiliary lubricating oil pump(TOP)
type OVCV flow 281.1 m3/h
inlet pressure 0.35MPa
motor model power 55 kW
voltage AC 415V current 100 A
rotating speed 2930 r/min insulation rank F
(EOP) DC lubricating oil pump
type OVCV flow 229.2 m3/hr
outlet pressure 0.31MPa motor power 37kW
insulation rank stator B/armature B current 208 A
rotating speed 1500 r/min manufacturer
(EOP) motor of the DC lubricating oil pump
motor model KD power 37 kW
voltage DC 220V current 200 A
rotating speed 1750 r/min manufacturer
power 37 kW manufacturer
Host oil cooler
cooling area 595 m2 the number of
cooling pipes
cooling water quantity 500 m3/hr oil flow 4930 L/min
inlet oil temperature 63.8 C outlet oil
temperature
46 C
working pressure 0.6 MPa
Hydraulic system of the jacking oil equipment
type HP volume pump power 55 kW
voltage 415 V max flow 150 L/min
using pressure 16 MPa
Jacking oil pump
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model rotating speed 1475 r/min
flow lift
Motor of the IC/DC jacking oil pump
model impulse impulse power 55 kW/55 kW
rotating speed 1478 rpm/1500rpm power factor 0.85
voltage 415/220 current 94.1/284
Connection way /Y insulation rank
protection rank
Oil-conveying pump of main oil tank
model 2CV-29/3.6-1 lift 36 m
rotating speed 1440 r/min flow 29 m3/hr
shaft power 6.25 KW necessary Npsh 5 m
efficiency 85% manufacturer
Motor of the oil-conveying pump of main oil tank
model Y132-M-4 power 7.5 kW
voltage 415 V current
Connection way /Y rotating speed 1440 r/min
protection rank insulation rank F
manufacturer
Lubrication oil-conveying pump
model 2CY-29/3.6-1 lift 36 m
rotating speed 1440 r/min flow 29 m3/hr
shaft power 6.25 KW necessary Npsh 5 m
efficiency 85% manufacturer
Motor of the lubrication oil-conveying pump
model Y132-M-4 power 7.5 kW
voltage 415 V current
Connection way /Y rotating speed 1440 r/min
protection class insulation class F
manufacturer
Oil purification pump
model 100AY60B lift 38 m
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rotating speed 2950 r/min flow 79 m3/hr
power 12.9 kW necessary Npsh
efficiency manufacturer
Motor of the oil purification pump
model YB160M2-2 power 15kW
voltage 415 V current
connection way /Y rotating speed 2950 r/min
protection class insulation class
manufacturer
Sewage oil pump
model 100AY60B lift 38m
rotating speed 2950 r/min flow 79 m3/hr
shaft power 12.9 kW necessary Npsh
efficiency manufacturer
Sewage oil pump motor
model YB160M2-2 power 15kW
voltage 415 V current
Connection way /Y rotating speed 2950 r/min
protection rank insulation rank
manufacturer
Oil purification device
Model GJZ-12 working
pressure
0.5 MPa
Heater power 72kW water content
of oil after
treated
50 ppm
Motor power 4/4/1.5 kW oil cleanliness
after
processing
MOOG standard 4 stages
Manufacturer Zigong high-precision filter
Manufacturing Co Ltd.
Page 14 of 29
1.7 TURNING GEAR MOTOR
model YB2.180L-6 power 15 kW
voltage 415 V current A
rotating speed 975 r/min connection way /Y
power factor 0. 81 insulation rank F
1.8 EH OIL SYSTEM
EH oil pump motor
model Y225M-4 power 45 kW
voltage 415V current A
rotating
speed
1450 r/min insulation rank B
protection
rank
1P44 manufacturer
EH oil tank
type set-mounted volume 1.6 m3
oil model Three aryl residue
phosphoric acid fat fire
resistant oil
oil brand number FYRQUEL EHG
EH oil cooler
type horizontal tube cooling area 10.9 m2
temperature 80C/70C shell/pipe
side
design
pressure
0.52/1.6 MPa (shell/pipe side)
cooling water
flow
38 L/min design max cooling
water temperature
33 C
Circulating filter pump motor
motor model Y90L-4 voltage 380 V
current 3.7 A pressure 0.52 MPa
power 1.5 kW rotating speed 1400 r/min
Connection
way
Y insulation rank B
Accumulator
type butyl rubber bladder type pressure 8 MPa
Page 15 of 29
1.9 SPECIFICATION OF TDBFP
Small turbine
Type Single-cylinder,
single flow, impulse,
condensing type
Control
system
MEH
Number of the stage 7 stage max working
rotating
speed
6000 r/min
Rated power 12000 kW steam source Steam extraction #4
Exhaust pressure 11.9 KPa (a)
Manufacturer Dongfang Steam
Turbine Co., Ltd.
1.10 OIL PUMP PERFORMANCE SPECIFICATION
Name Numb
er
Type Oil
flow
m3/h
Oil
pres
sure
MPa
Rotati
ng
speed
r/min
Electric motor
Model Power kW Voltage
V
Main oil pump 1 Centrifugal 20 0.58 2930 70LY-
34x2
13 AC 415
Standby pump 1 Centrifugal 20 0.58 2930 70LY-
34x2
13 AC 415
Accident
reserve pump
1 Centrifugal 16 0.44 3000 70LB-45 7.5 DC 220
Jacking oil
pump
no
Turning gear
oil pump
no
1.11 MOTOR OPERATED FEED WATER PUMP
Motor-operated feed water pump
Model HPT300-330M-5S Type Beckmannia body core
package, horizontal
centrifugal pump
Rated flow 1155 m3/hr Rated rotating
speed
5873 r/min
Page 16 of 29
Inlet water pressure 2.38 MPa Inlet temperature 179.9 C
Lift 2367 m Necessary Npsh 58.4 m
Shaft power 8921.9 kW Efficiency 84.5%
Number of stages 5 Intermediate
bleed-off
position
Lift 2328 m Rotating
direction
Clockwise look from the
conveying end to feed-
water pump
intermediate bleed-off
flow
43.5 m3/hr Flow of
supercharging
stage
intermediate bleed-off
pressure
10.44 MPa Sealing mode Mechanical seal
Minimum recirculation
flow
295 m3/hr (590
m3/hr close
automatically)
Manufacturer
Motor operated feed water pump motor
Model YKS1000-4 Power 11600 kW
Current A Voltage 11000 V
Rotating speed 1490 r/min Connection way
Insulation class F Power factor 0. 9
Cooling type empty-water Protection class
Motor heater power Voltage of the
motor heater
Booster pump of motor operated feed water pump
Model HZB253-640 Type Single stage double
extraction horizontal-type
centrifugal pump
Flow 1198.5 m3/hr Rotating speed 1490 r/min
Water temperature 179.9C Inlet pressure 1.19 MPa
Shaft power 518 kW Lift 136m
Lift 136m Efficiency 85.7%
Necessary NPsh 6.43 m Manufactured by Shanghai Power Equipment
Maintenance Works Co Ltd.
Page 17 of 29
Electro-hydraulic coupler of motor-operated feed water pump
Model R17K500M Input rotating
speed
1490 r/min
Output rated speed 9033 r/min Rated output
power
9630 kW
Speed-regulating
range
25%-100% Rated sliding
difference
2.6 highest rotating
speed
1.12 HP HEATERS
Item Unit #1 HP heater #2 HP heater #3 HP heater
Model JG-2240-1 JG-1950-2 JG-1600-3
Type Horizontal, U-shaped tube, double passes
Manufacturer Harbin boiler plant
Heat transferring area m2 2240 1950 1600
Design temperature of
the shell side
C 420/290 360/260 490/230
Design pressure of the
shell side
MPa 7.5 4.7 2.7
Design temperature of
the tube side
C 310 280 250
Design pressure of the
tube side
MPa 28 28 28
Feed water flow t/h 1863.75 1863.75 1863.75
Inlet temperature of
feed water
C 245.9 215.2 181.5
Feed-water outlet
temperature
C 276.7 245.9 215.2
Heated steam flow t/h 134.071 114.767 91.692
Heated steam pressure MPa 6.133 3.821 2.182
Heated steam
temperature
C 389 324.5 469.9
Drain water
temperature
C 251.5 220.8 187.1
Page 18 of 29
Difference of the
upper end
C -1.7 0 0
Difference of the lower
end
C 5.6 5.6 5.6
1.13 LP HEATERS
Item Unit #5 LP heater #6 LP heater #7, #8 LP
heater
#7, #8 LP
heater
Model JD-1550-1-2 JD-1280-1-1
Type Single horizontal
Manufactured by Orient Steam Turbine Plant
Heat-transfer area m2 1050 1050 600 950
Design temperature
of the shell side
C 260 200 150 150
Design pressure of
the shell side
MPa 0.6 0.6 0.6 0.6
Design temperature
of the tube side
C 170 150 150 150
Design pressure of
the tube side
MPa 4.0 4.0 4.0 4.0
Difference of upper
end
C 2.8 2.8 2.8 2.8
Difference of lower
end
C 5.6 5.6 5.6 5.6
1.14 DE-AERATORS
Model GC-2150/GS-250 Model No-head deaerator
Design pressure 1.23 MPa Design
temperature
300C
Working pressure 1.083 MPa Working
temperature
356.9C
Valid volume 250 m3 Design highest
working temp.
360C
Page 19 of 29
Rated output 2150 t/h Rated inlet water
temperature
185.6C
Max output Steam loss 0.2%
Oxygen content 7g/L Weight in
operating state
380 t
Numbers of spray 2 Nozzle pressure
drop
Page 20 of 29
Rotating speed 2920 r/min Connection way
1.16 CONDENSER
Model N-40000 Cooling area 40000 m2
Type Double shell, double back-
pressure, single-stroke (in
terms of each shell)
Amount of
condensing steam
1145.5+66.8 t/h
(host + small)
Oxygen content of the
condensate water of
Hot well outlet
30g/L Design cooling
water flow
71496 t/h
The number of the
condenser copper tube
Design pressure of
the water chamber
0.4MPa
Design outlet cooling
water temperature
35.3 C (max38C)> Cooling medium Fresh water
Cleanness coefficient 0.85 Condenser design
pressure
10.2kPa
(9.1/11 .4)
Condensate water
temperature
46.5 C Expansion
connection
material
Stainless steel
Manufactured by Oriental Steam Turbine Plant
Condensate water pump
Type Vertical and tube structure Model C720III-4
Number of stages Single-stage double
inhaling inlet
Sealing type disc mechanical
seal
Flow (t/h ) 1639/1784 (max) inlet water
pressure (MPa)
2.9/3.2 (max)
Inhalation pressure
(kPa)
10.2 pump's rotating
speed (r/min)
1480
Efficiency 84.0% Manufacturer Changsha Pump
Co. Ltd.
Motor of the condensate water pump
Model YKSL2100-4 Power 2100 KW
Voltage 11 KV Current 134 A
Rotating speed 1480 r/min Manufacturer Xiangtan Motor
Co. Ltd
Rated current 252 A Power Factor 0.88
Insulation class F Manufacturer ABB
Page 21 of 29
1.17 WATER RING TYPE VACCUM PUMP
Manufacturer Ji monash association cone machinery Co., Ltd.
Two-stage vacuum pump
model TC-11
Inhalated dry air quantity (kg/h) 64
Inhalation temperature (C) 34.2
Inhalation pressure (kPa) 3.5
Limit vacuum (-kPa) 3.3
Rotating speed (r/min) 494
Vacuum pump motor
Model Y355L1-12
Power (kW) 110
Voltage (V) 415
Current (A)
Rotating speed (r/min) 494
1.18 CIRCULATING WATER SYSTEM
Circulating water pump
Type 96LKXA-30 Vertical
oblique flow pump
Flow 46044 t/h
Lift 30m Rotating speed 372 r/min
Efficiency >87% Manufacturer Changsha Pump Plant
Circulating water pump motor
Model YKS4800-16 type Power 4800 kW
Voltage 11000 V Current A
Page 22 of 29
Rotating speed 375 r/min Insulation class F (Xiangtan Electric
Machine Works)
1.19 COOLING WATER TOWER
Cooling area 9000 m2 Total height of
tower
150.1 m
Wind inlet
elevation
10.0 m (Relative
elevation)
Height of the filling
end elevation
10.25 m (Relative
elevation)
Filling top
elevation
11.25 m
(Relative elevation)
Throat elevation 112.482 m
(Relative
elevation)
Diameter of the
tower bottom
110m (or so) tower throat
diameter
66.50 m
Diameter of the
tower top
71.176 m Shaft plane size 4.8x4.8 m
Shaft height 17.3 m Circulating water
cooling ratio
55
Ratio of the
concentration ol
circulating water
3-4 coefficient of
controlling recycled
water not scaling
< 0.2
1.20 INTEGRATED PUMP HOUSE SYSTEM
Industrial pumps (three)
model 350X250CHN flow 900-1200 m3/h
lift 50 ~ 65m rotating speed 1450 r/min
Matched power 250 kW manufacturer
Industrial pump motor
model YKK450-4 power 250 kW
voltage 1100 V current 16.4 A
rotating speed 1491 r/min power factor 0.88
Page 23 of 29
Connection way protection class
insulation class F manufacturer Xiangtan Electric Machine
Works
makeup pump of circulating water (3)
model 500X450 CFN flow 1800 m3/h
lift 16 m rotating speed 980 r/min
Matched power 110kW manufacturer Bo Chiping original Pump
Co. Ltd.
Motor of makeup pump of circulating water(3)
model 315L1-6 power 110 kW
voltage 415 V current 188 A
1.21 MAIN PARAMETER LIMITS
Sl
No.
Parameter Unit Normal High limit Low limit Trip
1 Rotating speed rpm 3000 3360
2 Load MW 600 640
3 Initial steam
pressure
C 538 546 528 474/460
4 HP exhaust
temperature
C
Page 24 of 29
9 Differential
expansion of LP
cylinder
mm -4.6 <
differential
expansion