Turbine and Accessories

7/30/2019 Turbine and Accessories

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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**




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





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




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



7.3 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



8.3 Height mm ~650

8.4 Number of sections Nos. 1 Finalizationduring

detailed engg

after final root

survey


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9 Discharge Ring Discharge

ring is beingunderstood as

a SS part of

draft tubecone.



9.3 Height mm ~600

9.4 Number of sections Nos.1


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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SecShe

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

SecShe


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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

SecShe


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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

18


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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

20


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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

Turbine and Accessories

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