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2. TURBINE AND ACCESSORIES
2.1 Guaranteed technical particulars
3.0Water discharge at rated turbine output
m3/sec
36.68**
3.1Maximum leakage through wicket gate at
max imum static head of head of 186 m
m3/sec ~ 0.33 In new
condition
3.2 Efficiency
3.2.1Turbine efficiency , discharge & gateopening at rated net head of 176.47 m and
rated speed
-at 110 % continuous rated output % 96.11**
-at 100 % continuous rated output % 96.37**
-at 75 % continuous rated output % 94.4**
-at 50 % continuous rated output % 89.21**
3.2.2Weighted average efficiency (as per the
Particular Technical Specifications)%
95.23
3.2.3
Turbine efficiency, discharge & gate
opening at maximum net head of 182.20186 m and rated speed
-at 110 % continuous rated output % 96.38**
-at 100 % continuous rated output % 96.09**
-at 75 % continuous rated output % 93.87**
-at 50 % continuous rated output % 88.14**
3.2.4Turbine efficiency, discharge & gateopening at minimum net head of 173.80 m
and rated speed
SecShe
ITEM DESIGNATION UNITS VALUE REMARKS
1 General
1.1 Manufacturer VoithHydro
1.2 Place of Manufacturer India,Germany
Brazil
1.3 Type/designation Vetical
Shaft
Francis
1.4 Applicable Standard Please see
Technical
descriptionof Turbine
2 Main Data
2.1
Turbine rated output at rated net head of
176.47 m, wit hin 90% gu ide vane openin g
and at rated speed
kW60914
2.2Maximum continuous output at rated head
of 176.47m kW67005
2.3Best efficiency output at rated head
176.47mkW
61433
2.4Output at Min net head of 173.80 m & at
rated speedkW
65283
2.5Output at Max net head of 182.20 186.0 m
& at rated speedkW
67005
2.6 Speed
a. Specific SpeedRpm-
kW-m
127.89 at rated output
and rated head.
b. Rated Speed rpm 333.33
c.Critical speed for combined turbine &
generator
>700
2.7 Maximum (VH Comment -stationary)
Runway speed at rated net head of 176.47 mrpm
545
2.8 Direction of rotation (viewed from top) CW
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-at 110 % conti nuous rat ed outputmaximum gate opening
% 96.14** Maximum gate
openingreferred to110% rated
output
correspondingto rated net
head of 176.47
-at 100 % continuous rated output % 96.34**
-at 75 % continuous rated output % 94.51**
-at 50 % continuous rated output % 89.52**
3.3Speed rise at rated net head of 176.47 m
caused by load rejection from
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3.10 Maximum temperature rise of guidebearing above cooling medium,
measured by embedded temperature
3.10.1 at maximum continuous rated operation C
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3.11.7 Peripheral at outlet
m/sec To be
informedduringdetail engg
3.11.8 Relative at outletm/sec To be
informedduring
detail engg
3.11.9 Draft TubeTo beinformed
during
detail engg
3.11.10 Velocity of water at liner endTo beinformed
during
detail engg
3.11.11 Velocity of water at exitTo be
informed
during
detail engg
3.12 Material standard / Class / Grade / Type
3.12.1 Runner ASTM A
743 CA 6NM/Equi.
3.12.2 Runner cone n.a. integral
3.12.3 Rotating labyrinth (upper) and (lower)ASTM A
743 CA 6
NM/Equi.
3.12.4
Fixed labyrinth (upper) and (lower)
ASTM A
743 CA 6NM/Equi.
3.12.5 Guide vanes ASTM A743 CA 6
NM/Equi.
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3.12.6 Lining of head cover
ASTM A
240 304L/Equi.
3.12.7 Lining of bottom ring ASTM A
240
304L/Equi.
3.12.8 Discharge ring cladding / Lining n.a
3.12.9 Bottom ring E250B IS
2062/Equi
3.12.10 Head cover E250B IS
2062/Equi
3.12.11 Discharge ring ASTM A240 304
L/Equi.
3.12.12 Draft tube cone E250B IS2062/E ui.
3.12.13 Spiral casing DIN EN
10250-2
S355/Equi.
3.12.14 Stay ring E250B IS2062/Equi.
3.12.15 Turbine shaft DIN EN10250,
C35E
/Grade DASTM A
668
3.12.16 Coupling bolts EN 10083,
42CrMo4/Equi
3.12.17 Shaft seal sleeve/liner ASTM A
240 304L/Equi.
3.12.18 Shaft seal HGW 2082Mo/Equi
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3.12.19 Guide bearing lining
Babbitt
Tego V840/Equi
3.12.20 Guide bearing housing E250B IS
2062/Equi
3.12.21Guide vane servomotor body, piston andrings
Servomotor
of Reputed
make
3.12.22 Pressure pipes ASTM A
106/E ui.
3.12.23 Cooler tubes Cupro-
Nickel
2.2. Informative data
ITEM DESIGNATION UNITS VALUE REMARKS
1 General
1.1 Manufacturer Voith Hydro
1.2 Place of manufacture India, GermanyBrazil
1.3 Applicable standards Please seeTechnical
description of
Turbine
2 Turbine Runner
2.1 Inner inlet diameter mm During detail
Engg
2.2 Outer inlet diameter mm 2645 Referes to inlet
edge of blade
2.3 Discharge diameter mm 2122
2.4 Peripheral velocity m/s ~46 Corresponds to
outer inlet dia
2.5 Number of blades Nos. 15
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2.6 Method of fabrication Cast welded
2.7 Runner inlet height mm During detailEngg
2.8 Total height mm During detail
Engg
2.9 Height of runner above C/L of distributor mm During detail
Engg
2.10 Depth of runner below C/L of distributor mm During detail
Engg
2.11 Weight kg ~10000
2.12Preventive coating against hydro
abrasionOptional (Hard
+ Soft)
2.13 Transport Dimensions(lxbxh) m ~2.7x2.7x1.3
3 Turbine Shaft
3.1 Shaft diameter mm 600
3.2 Internal bore dia mm 150
3.3 Length mm ~3400
3.4 Critical speed of Turbine rpm Refere 2.6 c
above.
Critical speed
is always calc
for whole
ower unit.
3.5Type of coupling with ge nerator Turbine
shaft and turbine runnerType
During
detailed
engg
3.6 Flange diameter mm ~1100
3.7 No. and diameter of flange bolts No. /mm Duringdetailed
en .
3.8 Type of bolts - Low Alloy
Steel
3.9 Weight Tonnes 8
4 Main Shaft Seal
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4.1 Type of gland and location n.a. Refer turbine
technicaldescription for
sealing
principle ofHydro static
shaft seal
4.2 Cooli ng water flow rate Lpm ~60
4.3 Cooli ng water pressure Mpa 0.2 to 0.3
4.4 Material of Gland seal n.a. Refer
turbinetechnical
description
for sealingprinciple.
Phynolic
rasine seal ringcreates sealing
surface against
SS liner onshaft.
4.5 Provision of Instrumentation During
detailed
engg.
5 Spiral Casing
Method of fabrication Welded
5.1 Internal diameter of inlet mm 2200
5.2Number of prefabricated sections of spiral
casingNos.
4 to 5 Excluding stay
ring
5.3 Main dimensions(as per IS 12800 Part-1)
-A mm 2200
-B mm ~ 2986
-C mm ~3499
-D mm ~3847
-E mm ~2946
-F mm During
detail Engg
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-G mm During
detail Engg
-H mm Duringdetail En
Plate thickness mm During
detail Engg
5.4 Maximum design working pressure bars 25.3
5.5 Test pressure bars 38.0
5.6 Total weight of spiral casing Tonnes ~15 Excluding stay
ring
5.7 Weight of heaviest section Tonnes ~6
5.8 No of Packages for transport 4 to 5
5.9Method of embedded scroll casing in
concreteDuring
detailed
engg.
5.10Nos. of joints to be welded at site andtotal joint length
During
detailed
engg.
5.11 Quantity of electrode for the sitewelding, specifications & make
Duringdetailed
engg.
6 Stay Ring
6.1 Method of fabrication Welded or
Cast welded
6.2 Outer diameter mm ~4250
6.3 Inner diameter mm ~3400
6.4 Height mm ~470 Height of stay
vanes
6.5 Number of stay vanes Nos. 26
6.6 PCD of stay vanes Nos. n.a.
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6.7 Number of sections Nos. 1 Finalization
during detailedengg after
final root
survey
6.8 Maximum design working pressure bars 25.3
6.9 Test pressure bars 38.0
6.10 Weight per section kg 14000
7 Head Cover
7.1 Outer diameter mm ~3600
7.2 Inner diameter mm ~1200
7.3 Height mm ~600
7.4 Number of sections Nos. 1 Finalization
during detailed
engg afterfinal root
survey
7.5 Weight per section kg ~11000
7.6 Method of Removal Top removal
7.7Means of drainage of leakage water from
head coverYes
8 Bottom Ring
8.1 Outer diameter mm ~3600
8.2 Inner diameter mm ~2200
8.3 Height mm ~650
8.4 Number of sections Nos. 1 Finalizationduring
detailed engg
after final root
survey
8.5 Weight per section kg ~5000
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9 Discharge Ring Discharge
ring is beingunderstood as
a SS part of
draft tubecone.
9.1 Outer diameter mm ~2600
9.2 Inner diameter mm ~2150
9.3 Height mm ~600
9.4 Number of sections Nos.1
9.5 Weight per section kg ~800
10 Turbine pit liner
10.1 Inside diameter mm 3650
10.2 Minimum plate thickness mm 10
10.3 Elevation of highest point m 792.88
10.4 Elevation of lowest point m 788.86
10.5 No. of section 2
10.6 Weight of fully assembled liner kg ~4500
11 Guide Bearing
11.1 Type Tilting pad
11.2Number of pads (in case of segmented
type) Nos.8
11.3 Runnin clearance mm ~0.1
11.4 Diameter mm 600
11.5 Height mm 160 Height of bearing pad
11.6Distance from reference level to guidebearing centerline
mm~1300 Reference
level being c/l
of distributor
11.7 No. of coolers Nos 1
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11.8 Maximum safe working pressure bars During
detailedengg.
11.9 Cooling water requirement Lpm ~25
11.10Losses in the bearing at rated operatingcondition
~4 kW
11.11 Oil specification grade and make - ISO VG46
11.12 Capacity of bearing oil reservoir L ~100
12 Guide Vanes
12.1 PCDxHtxWt of each mmx kg 2965x465x365
Ht=featherheight
Wt=feather
width
12.2 Number of guide vanes No. 26
12.3 Weight per guide vane kg ~180
13 Guide Vanes Operating Mechanism
13.1 Type of servomotor Double
acting13.2 Number of servomotors Nos. 2
13.3 Full stroke mm 200
13.4 Active volume cm3 3530+2650
= 6180
13.5 Maximum operating pressure bars 120
13.6 Minimum operating pressure bars 80
13.7 Provision for servomotor lock provided Yes/No Yes Manual
13.8 Weight of servomotor kg Duringdetailedengg.
14 Guide Vane Servo Motors
14.1 Nos.xbore dia m x full stroke length mm 2x150x200
14.2 Normal working pressure Kg/cm2 80-120
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14.3 Rating of capacity Kg m During
detailed
engg.
14.4Material of servo motor body, piston
ringsDuring
detailedengg
15 Draft Tube
15.1 Diameter of draft tube elbow top mm ~2800
15.2 Length of draft tube elbow mm 10800 Steel liner
from unit c/l
15.3 Height of Draft tube at exit mm 4000
15.4 Width of draft tube at exit mm 5150
15.5 Elevation of lowest point (Datum) m 779.17
15.6Length of draft tube exit from unit centreline
m18.485
16 Draft Tube Cone
16.1 Height m ~3.6 Upper cone +lower cone
16.2 Top diameter mm ~2100 ID
16.3 Bottom diameter mm 2800 ID
16.4 Weight of the draft tube cone (removable) kgs 3500
17 Centralized grease lubrication system N/A
17.1 Capacity and rating of equipment - -
17.2 Type and make of pump -
17.3 Rating of pump kW -
17.4 Capacity of grease reservoir Litres -
17.5 Provision of Manual operated pump Yes/No -
18 Unit Dewatering Connection
18.1
Penstock gravity dewatering valve, type
x size x material pressure rating x
location
Duringdetailed
engg.
18.2Draft tube dewatering valve type x sizex material x pressure rating x location
During
detailedengg.
18.3No of Valve During
detailedengg.
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18.4
Scroll casing dewatering valve, type x
size x material x pressure rating xlocation
During
detailedengg.
18.5 Size of piping for dewatering
18.5.1 Penstock During
detailed
engg.
18.5.2 Scroll casing Duringdetailed
engg.
18.5.3 Draft tube Duringdetailedengg.
19 Make and Type of
19.1 Pressure Gauge Reputedmake
19.2 Pressure Transducer Reputed
make
19.3 Turbine discharge flow-meter Reputed
make
19.4 Flow meter for Shaft Seal Reputedmake
19.5 Dial type thermometer Reputed
make
19.6 Resistance temperature detector Reputed
make
19.7 Moisture detector Reputed
make
20 Dimensions
20.1
Maximum diameter, length and
designation of turbine part to be removed
through generator stator bore.
mm
3600, head
cover/
distributor
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20.2 Maximum transportation dimension (L xW X H) and designation of turbine part tobe transported
mm x mmx mm
4300x
3250 x3500,
Stayring
If transported
in single piece.
20.3Minimum distance between centerlines of
adjacent unitsmm
14000
20.4 Recommended setting elevation m788.5
21Maximum Upw ard /Downward
Hydraulic axial thrustKN
825
22 Pressure fluctuations (% of rated head)
22.1 spiral case inlet % 1.3 Within
continuous
operating range
22.2 draft tube cone (after runner) % 3.5 Within
continuousoperating range
22.3 draft tube outlet % n.a
23 Transient behavior
23.1 Guide vanes opening time s ~ 15
23.2 Guide vanes closing time s ~ 11
23.3 Maximum Pressure rise % See 3.4
23.4 Maximum Speed rise % See 3.3.1
24 Characteristic Data
24.1Maximum steady state runaway speed atfollowing head
24.1.1 at maximum net head of 182.20 186 m rpm 560
24.1.2 at rated net head of 176.47 m rpm 545
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24.1.3 at Minimum net head of 173.80 m rpm 540.5
24.1.4 Vibration amplitude at the shaftmicrons(peak to
peak)
Less than
line B-C,
ISO 7919-5
24.2 (Expected)Turbine water discharge at
24.2.1 Rated output at rated net head m3
/sec 36.68**
24.2.2 Maximum output at rated net head m3
/sec 40.46**
24.2.3Maximum runaway condition at
maximum net headm
3/sec
23.05**
24.2.4 No-load at rated net head m3
/sec 3.99**
24.3Time of guide vane opening for increasing
load from zero to
24.3.1Full gate output / Rated load / 75% / 50%
/ 25% rated loadsec ~ 15 sec
for full
gateouptut/Dur
ing detail
engg
24.4Time of guide vane closure for decreasing
load to zero from
24.4.1Full gate output / Rated load / 75% / 50%/ 25% rated load
sec~ 11 secfrom full
gate
ouptut/During detail
engg
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24.5 (Expected)Guide vane opening at ratedspeed for
24.5.1no-load condition at rated head of 176.47m
%10.48**
24.5.2 Rated output at net head of 176.47 m % 90.4**
24.5.3Maximum gate output at net head of
176.47 m%
100** Maximum gate
opening referredto 110% rated
output
corresponding torated net head of
176.47 m
24.6
Time taken to reach runaway speed from
normal speed in case of failure of
governing systemsec. During
detail engg.
24.7Total load on thrust bearing generated
from turbine
24.7.1 From turbine rotating parts kN ~176
24.7.2From maximum downward hydraulic
thrustkN
~825 Relief pipes
considered.
24.7.3 From maximum upward hydraulic thrust kNDuringdetailed
engg
24.8
Maximum unbalanced hydraulic thrust
during worst operating condition (specifycondition also)
kN
~825 During load
rejection
24.9 Fly wheel effect of turbine rotating parts kg m
2 ~ 5000 J value
24.10Fly wheel effect required from the
generatorkg m
2423000 J value
24.11Specific speed of unit at rated net head of
176.47 m with 100% guide vane openingRpm
kW-m
134.14
Section 2Sheet
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24.12 Critical speed of turbine rpm Refere 2.6 c
above.
24.13 Weights
24.13.1Weight and designation of heaviest part orassembly of the turbine as prepared for
shipment
kg
14000,
Stay ring
If transported in
single piece.
24.13.2Heaviest turbine assembly to be handled
by powerhouse crane during installation
kg
30000 Distributor
assembly
24.13.3Heaviest embedded part for erection to behandled by EOT Crane
Kg
2.3. Recommended additional spare parts
List hereunder the spare parts which are recommended by the Contractorfor purchase in addition to the specified spare parts. The purchase of any orall of the recommended spare parts will be at the option of Employer. Theprices for recommended additional spare parts for five (5) years shall therefore not
be included in the bid prices.
ITEM DESCRIPTION UNIT PRICE/ UNIT
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Section 2Sheet
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11.12.
13.
14.
15.
16.
Note: Use additional sheet, if required
** Single point efficiencies, corresponding guide vane openings and discharge values are for
information purpose only. However mean weighted efficiency(Hydraulic) is guaranteed. Watertemperature of 23 degree C is considered for efficiency calculation.
2.4. Information to be supplied together with the bid
At least the information listed hereunder shall be given by the Bidder. The Biddermay submit additional documents /descriptions to describe special technical featuresof offeredequipments / system:
1 Computation pressure rise at turbine inlet under the most unfavorableconditions (load acceptance and rejection) as requested in Technical
specification. Conditions considered as well as governor acting times to be
clearly indicated in the computations.
Reply :Refer attached Transient calculations report
2 Computation turbine speed rise under conditions as above and for
following load rejection parameters.From 110 % rated output to zero Reply :Refer attached Transient calculations
report
From100 % rated output to zeroFrom 75 % rated output to zero
From 50 % rated output to zero
From 25 % rated output to zero
Reply : During detail engg
3 Expected flow characteristics during closing and opening of guide vanes as
Section 2Sheet
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function of time.
Reply : During detail engg.
4 Expected performance curves for the maximum, rated and minimum net
heads. The curves shall also show the overload output at maximum possible
guide vane opening extending beyond the guarantee points.
Reply : Find attached prototype hill curve.
5 Dimensional drawing (cross section) of turbine and associated equipment
showing main dimensions.
Reply :During detail engg. Refer power house cross section drawing no. 2734-510225 for overall dimension.
6 Describe proposed shaft seal systems, preferably illustrated by schematicdiagram.
Reply : Refer Turbine Technical Description
7 Applicable methods and types of vibration monitoring system.Reply : During detail engg8 Provide information on model or field performance tests performed on a turbine
which is hydraulically similar to the proposed turbine. Indicate at least the following:
Reply:
Xi Luo du(China)
Place of model or field tests : Lausanne + Heidenheim
Year of model or field tests : 2008
Designed rated turbine output : 784 MW
Rated net head : 197 m
Rated speed : 125 rpm
Efficiency achieved : Yes
9 Calculation sheet for dimensions of turbine, generator and power house.Reply : Refer power house layout drawings.
10 Calculation sheet of various heads like, rated net head, maximum nethead and minimum net head.
Reply : Net heads are already provided by employer. The same has been used.
Section 2Sheet