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10 MW Siemens (2006) make Condensing type Steam Turbine Generator Set, having the Following Technical Specifications:



TECHNICAL DETAILS:



TURBINE DETAILS:

Manufacturer : Siemens (India)

Year of Make : 2006

RatedPower(At generator terminals) : 10000 kW



Speeds

Turbine Speed : 7500 RPM

Emergency trip(Turbine) : 8250 RPM

Critical Speed - 1 : 2850 RPM

Critical Speed 2 : 6000 RPM



Direction of Rotation : C.C.W.



Steam Parameters:

Inlet Steam Pressure : 64 Ata

Inlet Steam Temperature : 480° C

Inlet Steam Flow : 42.0 t/h



Bleed Steam Pressure : 4.406 Ata

Bleed Steam Temperature : 207.3° C

Bleed Steam Flow : 5.312 t/h



Exhaust Steam Pressure : 0.104 Ata



Speed

Rated(Generator) : 1500 RPM





GEAR BOX DETAILS:

The supplied Gearbox is a Reducer type gearbox, which is designed with a service factor in accordance with AGMA 6011 H-98, The high speed shaft of the gearbox in coupled to the turbine by means of a flexible coupling. The low speed shaft end of the turbine is coupled directly to the alternator. Torque is transmitted at the low speed end due to Frictional force generated by the butting of the two shafts.



Manufacturer : Triveni

Type : N2419C

Rated power : 10000 kW

Year of make : 2006

Input Speed (Turbine) : 7500 RPM

Output Speed (Generator) : 1500 RPM

Speed ratio : 5: 1



Lubrication

Oil Type : ISO VG 46

Filtering : 25 microns

Inlet Pressure : 1.5 to 2.0 Bar (g)

Inlet temperature : 48° C

Oil Flow : 240 LPM



Barring Gear

Type : Manual engage and auto disengage

Power : 11 kW

RPM : 1470



Instrumentation

Provision for Vibration probes (3/4” NPT) supplied with XL-Type probes for radial bearing & Axial Bearing

Thermo Elements

Temperature Probes (PT 100, 2x3 wire)

Vibration measuring (see Section 2.7 Special Instrumentation)



Main Oil Pimp

Flow : 700 LPM

Discharge pressure : 5 bar





ALTERNATOR DETAILS:

Manufacturer : TDPS, Bangalore

Type : TC-145

Year of make : 2006

Capacity : 10 MW

Voltage : 11 kV ± 10%

Current : 656 A

Power Factor : 0.8 Lag

Frequency : 50 Hz ± 5 %

Speed : 1500 RPM

Critical Speed (with respect to turbine) : 2250 RPM

Protection : IP54

Cooling Water Inlet Temperature : 36° C

Air inlet temperature : 45° C

Oil Quantity : ISO VG46

Oil Inlet temperature : 49° C

Oil Outlet Temperature : 64° C



CONDENSING SYSTEM DETAILS:

Purpose of System

The purpose of the condenser and evacuation system is

To build up and maintain a necessary vacuum for the turbine exhaust steam.

To condensate exhaust steam flow from the turbine.

To perform vacuum braking and shorten the turbine coasting down time.

To receive internal drainage from the turbine plant and this way return it to the process.



System Function

The main condenser is a tube heat exchanger, Exhaust steam from the turbine is condensed in the tube bundle and the condensate is collected in the Condenser hotwell, the condensate level controlled and always kept below the tube bundle. Subcooling of the condensate is prevented by the design.

The purpose of the vacuum- breaking valve to reduce the condenser vacuum by admitting air to the condenser and tube casing.

A rupture disc in the condenser shall prevent in the turbine exhaust and condenser system.

With turbine internal drain lines flash tank is connected to condenser hotwell.

Manholes for internal inspection are provide on the water boxes and the condenser shell.



Condenser:

Manufacture : Siemens Ltd

Operating Pressure : 0.105 ata

Operating temperature : 46.4 Deg. C

Test Pressure Shell side : Water Filled

Test Pressure Tube Side : 6.5 bar (g)

Weight of the equipment (empty) : 22000 KGS

Weight of the Equipment (Operating) : 34000 KGS

Weight of the Equipment (flooded) : 42000 KGS



Steam Jet Air Ejector:

Condenser vacuum is built up and maintained with a steam jet air ejector unit.



A high capacity steam Ejector (Hogging ejector) is used to build up the vacuum in the main condenser during starting procedure.

During operation in the two stage steam ejector is used to maintain the condenser vacuum operating steam is condensed in the stages of the ejector condenser, which is cooled by condensate from the main condenser (inter condenser) Air and other non-condensed steam are then evacuated from the second stage.(after condenser)



Main Components:

Hogger ejector with silencer

Y Stage Ejector I

Y Stage Ejector II

Z Stage Ejector I

Z Stage Ejector II



Motive steam Pressure and temperature are 10Ata and 400° C

Steam Jet Ejector supplied by new field for details please refer manual



Condensate Extraction Pumps:

Condensate extraction pumps are supplied by Sulzer.



PROTECTION AND SAFETY EQUIPMENT (Emergency Tripping):



Sr. No.Criterion Unit range Operating range Response 1.Over speed Turbine Min17500 82502. Ax. Bearing position Mm± 0.1 to 0.36± 0.83.Turbine bearing metal temperature ° C60 to 90° C>1254.Turbine bearing vibration Microns 55 >1055.Lube oil pressure Kg/cm2 2.5 <1.26.Turbine exhaust steam pressure Ata 0.104>0.47.Exhaust temperature ° C55>1058.Generator bearing metal temperature ° C60 to 70>9012.Generator bearing vibration Microns130>23210.Gear box radial bearing Temperature ° C60 to 80 >11011.Gear box vibrationMicrons50(HS)

60(LS)>125

>15012.Generator winding temp° C80 to 90>14513.Inlet steam pressure Bar 64>69.3

<28.414Inlet steam temperature ° C480>494

<280

PROTECTION AND SAFETY EQUIPMENT (Alarm Signal):



Sr. No.Criterion Unit range Operating range Response 1.Turbine bearing metal temperature° C60 to 90° C>1202.Axial bearing position Mm± 0.1 to 0.2± 0.63.Turbine bearing vibration Microns 55 >704.Oil temperature after lube-oil filter° C48>55

<305.Oil pressure difference at Lube oil filter Bar0.8>0.86.Lube oil header Bar(g)2.5<1.77.Pressure difference at control oil filterBar0.2>0.88.Inlet steam pressure Bar64.0>66.15

<56.79.Inlet steam temperature° C480>488

<35010.Exhaust steam pressureAta0.104>0.611.Exhaust steam temperature° C55>8512.Seal Steam pressure Bar0.02<0.005

>0.05

>85

13.Generator bearing metal temperature° C60 to 70>8514.Generator winding temp° C80 to 90>14015.Generator hot air temperature ° C60 to 70 >8016.Generator cold air temperature° C40 to 45>52

17.Gear box vibrationMicrons60(LS)

50(HS)>90

>6518.Generator winding temp° C60 to 80>10019Generator bearing vibration Microns130>180



SCOPE OF SUPPLY:



1 No. 10 MW SIEMENS make steam turbine coupled to TRIVENI make reduction gear box and 10 MW TDPS make alternator.

Inlet Steam Valve.

3) Complete governing system with actuator &all interconnected pipings.

4) Complete oil cooling system including:

a) Oil tank with AOP mounted on the tank, Oil Vent, etc. with interconnected oil piping.

b) Oil skid comprising of 2 Nos. Oil Coolers with 1 Set of duplex Oil Filters, 2 Nos. Control Oil Coolers with 1 Set of duplex Oil Filters and all interconnecting oil pipeline.

c) Main oil pump mounted on gearbox shaft.

d) Oil Centrifuge with all interconnecting piping.



5) Complete condensing system including:

i) Bellow mounted between turbine and condenser.

ii) Condenser with spring mounted supports (4 Nos.) complete with its mountings, bellows, condenser flashbox, etc.

iii) 2 Nos. Condensate extraction pumps with electric motors.



6) Air Ejector system with valves.

7) Turbine Supervisory Panel (including 505 Governor).

8) Gear box with its mountings, auxiliaries and pedestals.

9) Coupling between turbine & gear box and gear box & alternator.

10) Alternator Cooling System (Mounted on alternator top).

11) Exciter with its pedestal (mounted separately).

12) 1 No. AVR panel.

13) 1 No. 10 MW 11 kV generator panel.

14) 1 No. NGR panel.

15) 1 No. CT/PT Panel.

16) 1 No. 110/11kV Transformer Panel (Ring Panel).

17) 1 No. Float cum Boost Charger Panel.

18) 1 No. Turbine MCC Panel.

19) All locally mounted controls.

20) Cables from alternator/exciter up to control panel.

21) Interconnecting pipings between all the TG Set accessories, as available.

22) Manuals & Drawings pertaining to the turbine, gear box and alternator, as available.



PHOTOGRAPHS:

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