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Project
Name: Rehabilitation Project of Tiwi
and Mak-Ban Geothermal Power Plants
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Country:
Philippines
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Client:
National Power Corporation (NPC)
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Financial
source : Overseas Economic Cooperation Fund(OECF)
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Service
Period: April 1997 to November 2005
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1.
PROJECT DESCRIPTION
Units
to be rehabilitated are 4 units of 55 MW at Tiwi GPP and 4 units
of 55 MW at Mak-Ban GPP. Tiwi and Mak-Ban started the commercial
operation in 1979. Both plants heavily deteriorated after 18 years
operation and needed to be rehabilitated for reliable operation
at the rated output as well as to extend the life of these plants.
With financial
assistance of the Overseas
Economic Cooperation Fund(OECF) ,
the project started in April 1997. WEST JEC associated with PGI,
the steam developer/supplier for both power plants, had been provided
the engineering services.
2.
SERVICES
- Site survey
and inspection of plant facilities
- Preparation
of environmental monitoring and pollution control system condition
report
- Finalization
of rehabilitation plan and scope
- Preparation
of tender documents
- Assistance
in bidding and contracting
- Check and
review of manufacturersf design and drawings
- Construction
supervision
- Assistance
in the inspection and witness to shop tests
- Assistance
in commissioning
- Training in
power plant design and construction supervision on on-the-job
(OJT) basis
3.
MAIN TECHNICAL FEATURES
Tiwi
| @ |
Units
1 and 2 |
Units
5 and 6 |
| Capacity
(gross, original) |
55
MW x 4 units |
| (after
rehabilitation) |
60
MW x 2 units |
57
MW x 2 units |
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@Turbine/Condenser
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| Manufacturer |
TOSHIBA,
Japan |
| Type |
Single
cylinder, double flow, impulse, condensing |
| Steam
Pressure at MSV |
7.86
ata |
| Generator |
@ |
@ |
| Manufacturer |
TOSHIBA,
Japan |
| Capacity |
69
MVA |
| Voltage |
13.8
kV |
| Frequency |
60
Hz |
| Power
factor |
0.87 |
0.83 |
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@Noncondensable
Gas Removal System
|
| Type |
2
stage ejector and ejector/vacuum pump hybrid system |
| Gas
content design value |
2.8
wt% |
| Cooling
Tower |
@ |
@ |
| Manufacturer |
Marley
Cooling Tower, USA |
| Type |
Induced
draft, double cross flow, wooden |
 |
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New
Turbine Rotor for Tiwi Unit-2
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Mak-Ban
|
@
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Units
1 and 2 |
Units
3 and 4 |
| @Capacity
(gross, original) |
55
MW x 4 units |
| @(after
rehabilitation) |
63.2
MW x 4 units |
| @Turbine/Condenser |
| @Manufacturer |
Mitsubishi
Heavy Industries Ltd. (MHI), Japan |
| @Type |
Single
cylinder, double flow, impulse and reaction, condensing |
| @Steam
Pressure at MSV |
8
ata |
| @Generator |
| @Manufacturer |
Mitsubishi
Electiric (MELCO), Japan |
| @Capacity |
68.75
MVA |
| @Voltage |
13.8
kV |
| @Frequency |
60
Hz |
| @Power
factor |
0.919 |
0.83 |
| @Noncondensable
Gas Removal System |
| @Type |
2
stage ejector system |
| @Gas
content design value |
1.0
wt% |
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@Cooling
Tower
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| @Manufacturer |
MARLEY |
| @Type |
Induced
draft, double cross flow |
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Mak-Ban
Units 5 & 6 before rehabilitation
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Mak-Ban
Unit 2 Cooling Tower after rehabilitation
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@
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