55MW GE Frame 6B Combined Cycle Complete Power Plant for Sale
Dual Fuel, 50Hz.  Ansaldo Steam Turbine Generator

Contact Milt Fyre    milt@rmaglobal.com 503-351-9898


 History

 Power plant was erected in 1994 and had the first commercial operation in February 1995.

Power plant will remain in stand by operation up to end of October 2010 (available to the local grid only for peaking expected during summer 2010), date when the plant should go out of operation, be de-commissioned and available for sale.

 Equipment List & main specs

 Combined Cycle Power Plant based on the following equipment list:

 

Equipment

Model

Make

Running hours
(updated 1st May, 2010)

Gas Turbine

Frame 6B Steam I (Ext) G.E.

GE Licensee

110538

Steam Turbine

CDI 635 R

Ansaldo

108906

GT Generator

45 Mva    T190  - 240

Alstom

110538

ST Generator

23 Mva  GSCR - 1000 Z4

Ansaldo

108906

Gas Compressors

2HM/1 - Nuovo Pignone

Nuovo Pignone

110538

Heat Recovery Steam Generator

GVR

 (Ansaldo)

110538

Step-up transformer 11 - 11 - 220 KV

3H6132 - TP

ABB

duty since 1994

Transformer  6 - 0,4 KV x auxiliaries

G30121/1 - TD1

 

duty since 1994

Transformer  6 - 0,4 KV x auxiliaries

G30121/2 - TD2

 

duty since 1994

Transformer 22 - 04 KV x emergency feeding

G30122/1 - TD3

 

duty since 1994

Transformer 11 - 6 KV x auxiliaries

G30123/1 - TA1

 

duty since 1994

Transformer 11 - 6 KV x auxiliaries

G30123/2 - TA2

 

duty since 1994

 Major details are summarized in following table:  

Typology

Power Plant Gross Output

[MW]

50,1

Arrangement

 

combined cycle (1 TG + 1 TV)

Main fuel TG

 

Natural gas

Back up fuel TG

 

no

Operation mode 

 

Base load

Black start

 

no

By-pass stack

 

no

Auxiliary boiler  

 

yes (not for sale)

Cogeneration mode (steam flow):

HP

[t/h]

8,5

IP

[t/h]

13

LP

[t/h]

6

Steam pressure line:

HP

[bar]

24

IP

[bar]

12

LP

[bar]

6

Efficiency (thermal + electric)

[%]

60,0

Gross Electric Efficiency (without cogeneration)

[%]

45,3

Weather

Average, min, max  Temperature

[C]

12; -8; 35

Average Humidity

[%]

60,0

Gas Turbine

Name

 

TG1

Manufacturer

 

G.E.

Gas turbine type

 

MS 6541 B

TG Power  - ISO conditions

Preselected load

[MWe]

-

Base load

[MWe]

39

1st synchronizing

 

Aug 1994

Operating Hours fuel gas

Fire Hours:

 

110538 at 01/05/2010

Equivalent Operating Hours:

 

not used

Anti-icing

 

steam

Filters

Coalescer+prefilters+high eff.

yes

Self cleaning (pulse jet)

no

Aspiration system conditioner

 

no

Gas compressor

 

yes

Gas heating

 

no

NOx reduction system

 

steam injection

TG start device

 

electric motor + torque converter

O2

[%]

15

NOx  limit value

[mg/Nm3]

200

CO limit value

[mg/Nm3]

100

Particulate Matter  limit value

[mg/Nm3]

-

SOx  limit value

[mg/Nm3]

-

HRSG

Number of unit

 

1

Name

 

GVR

Manufacturer

 

ANSALDO

Post firing

 

no

Fresh air

 

no

Pressure level and Temperature

HP

[bar ; C]

70 ;   500

IP

[bar ; C]

-

LP

[bar ; C]

6 ;   285

RH

 

no

HP Feedwater Pump

Manufacturer

KSB

Q; H; T                         [m3/h ; m ; C]   

69,7 ;  P max 75,5 ;   164 C

Steam Turbine

Name

 

TV

Manufacturer

 

ANSALDO

Serial Number

 

 

Power

[MWe]

15   (full condensing);                                                             11   (cogenerative condition)

1st synchronizing

 

Aug 1994

Operating Hours

 

108906 at 011/05/2010

Condenser fluid

 

air

Cooling system

for Steam Turbine

Type

 

air condenser

Manufacturer

 

 

Thermal Power

[MWt]

44

for Auxiliaries

Type

 

evaporative tower

Manufacturer

 

 

Thermal Power

[MWt]

unspecified

electrical

TG Generator

 

ALSTOM

Power of  TG Generator

[kVA]

46.000

Cooling system of  TG Generator

 

air / water

TV Generator

 

ANSALDO

Power of  TV Generator

[kVA]

23.000

Cooling system of  TV Generator

 

air / water

Main Transformer

TG

 

ABB

TV

 

Type of transformer

TG

 

75.000 kVA ONAN

TV

 

Staff

Total staff of  Power Plant

 

15

Production department

 

11

Nb. of staff per shift

 

1

Maintenance department

 

3

 Brief description of main features  

 Frame 6B already incorporates latest GE upgrading packages like: upgraded brush seals for better efficiency, higher firing temperature for increased power output, upgraded IGV, Extendor Kit on combustion components to optimize maintenance and extend inspection intervals.

Gas Turbine Combustion system is Dual Fuel (Natural Gas + Distillate Oil).

Starting System is based on Electric Motor.

 At date Frame 6B Gas Turbine accumulated 110,538 Firing Hours.

Second major Inspection to the Gas Turbine was completed last year.

 

45 MVA Alstom Generator (for GT), model T190 240. Spare stator for this generator is available at stock.

 Mark V Control System.

 Emission control by Steam injection on gas turbine: at 15C ambient temperature, with GT full power output around 40 MW and about 2 Kilogram / sec of steam injection, emission levels are roughly:

 Present owner confirms that the gas turbine already completed the second major overhaul before the end of commercial operation.  

 1 x 23 MVA Alstom Generator (for ST), model GSCR 1000 Z4

Steam turbine accumulated 108.906 firing Hours.

 DCS Control System for thermal plant (boiler and steam turbine)

ST cross section is reported below:

 

 Power Plant is also equipped with two alternative compressors model 2HM/1, for natural gas: one compressor able to boost the pressure from the 11 - 12 bars of the pipeline up to 19,5 Bars required for the correct operation of the gas turbine.

 Second compressor works in stand by mode, to replace the first in case of failure or maintenance. If both compressors work simultaneously, they are able to boost gas pressure from 5 bars up to 19,5 Bars. Below pipeline pressure of 5 Bars, the two compressors trip.

Both Compressors are powered by electrical motors.

 

PLANT IMAGES

 

Img 1. Compressors room

 

Img 2. Steam Pipeline

 

Img 3. External view of the plant

 

Img 4. External view of the plant

 

 

Img 5. Gas turbine air filter chamber

 

Img 6. Demi-water tanks

Img 7. External view of the transformers

 

Img 8.  External view of the transformers

 

 

Img 9. Turbine control server

Img 10. Control room

 

Img 11. Control room

 

Contact Milt Fyre    milt@rmaglobal.com

Email: sales@rmaglobal.com   Phone: (503) 595-5418   Fax: (503) 635-0091   Copyright 1995-2010: RMA Inc.