This document provides information on multiple power plants owned and operated by EDC in the Philippines. It lists the name, location, generation capacity and type of several geothermal power plants with a total capacity of 1,199 MW. Technical details are also given for some of the larger power plants, including Upper Mahiao, Malitbog, and Mahanagdong A & B, describing the turbine and generator configurations, steam parameters, cooling systems and other key facilities. Process diagrams illustrate the steam cycles used at these plants.

1. EDC POWER PLANT
FACILITIES

2. EDC-Owned
• 110 MW Bacman I
• 40 MW Bacman II
EDC- Owned Albay and Sorsogon
• 49.4 MW Northern Negros
Bago City, Negros Occidental EDC Owned
• 125 MW Upper Mahiao
• 232.5 MW Malitbog
• 180 MW Mahanagdong
• 50.9 MW Optimization
Leyte
NPC- Owned (with SSA)
• 112.5 MW Tongonan I
EDC-Owned
• 112.5 MW Palinpinon I Ormoc /Kananga. Leyte
• 80 MW Palinpinon II
Valencia, Negros Oriental BOT
• 52 MW Mindanao 1
• 54 MW Mindanao 2
Kidapawan, Cotabato
Total = 1,199 MW

3. EDC PLANTS

5. 440 MW Submarine
Cable to Luzon
PANAY C360 MW
Cap (MW) 93 200 MW
Demand (H) 122
Deficit (29) LGPF
C85 MW LEYTE-SAMAR
Cap (MW) 561
Demand 160
Surplus 401
200 MW cap
NNGPF
100 MW cap
C50 MW
CEBU
Cap (MW) 151
NEGROS Demand (H) 402 BOHOL
Cap (MW) 185 Deficit (251) Cap (MW) 6
Demand (H) 184 100 MW
C90 MW Demand 42.3
Surplus 1 Deficit (36.3)
100 MW cap
SNGPF
THE VISAYAS GRID (2008 PEAK)

6. Brief Description
Upper Mahiao Geothermal Power Plant
The power plant has a combined gross
capacity of 131.86 MW and designed to
operate at base load conditions. It
comprises four GCCUs (Geothermal
Combined Cycle Unit) with 31.8 MW
capacity each and one brine Ormat
Energy Converter (OEC) binary unit with
4.6 MW capacity. Each GCCU consists of
one 20.3 MW GE non-condensing steam
turbine that exhausts to three OEC binary
cycle turbines with a rated capacity of 3.8
MW each.

7. Technical Description
Upper Mahiao Geothermal Power Plant
Unit UMPP STG Bottoming OECs Brine OEC
Location Kananga, Leyte
Contracted Capacity MW net 118.5 4 units 12 units 1 unit
Commisioned Date Jun-96
Steam Pressure ksca 11 11
Steam Flow Rate TPH 1019 254.75 1267 TPH Brine
Turbine Capacity MW 20.6 MW x 1 2.5 MW x 2 3 MW x 2
Reaction,
Type
Noncondensing Axial Impulse Axial Impulse
Power Capacity MVA 28.07 MVA x 1 5.625 MVA x 1 6.875 MVA x 1
Station Generator Voltage kV 13.8 13.8 13.8
Facilities Type GE Kato Kato
No. of cells 3x9 21
Air Cooled
Type Crossflow. Induced draft
Condensers
Vacuum ksca 8.43 8.43
Gas Capacity
Extraction Type

8. Process Diagram - UMPP
Single Flash Binary Cycle

9. Brief Description
Malitbog Geothermal Power Plant
The power plant has a combined gross
capacity of 232.5 MW and designed to
operate at base load conditions. It
consists of three 77.5 MW Fuji
conventional steam turbines with direct
contact condensers and uses high
pressure steam (10 kg/cm2) for power
generation.

10. Technical Description
Malitbog Geothermal Power Plant
Unit Malitbog Main Malitbog Bottoming
Location Kananga, Leyte
Contracted Capacity MW net 216 13.35
Commisioned Date July-96 December-97
Steam Pressure ksca 11.0 5.96
Steam Flow Rate TPH 1585.29 109.08
Turbine Capacity MW 77.5 MW x 3 14.56 MW x 1
Reaction, Double Impulse,
Type
flow, Condensing Condensing
Capacity MVA 94.1 MVA x 3 20 MVA x 1
Power
Generator Voltage kV 13.8 13.8
Station
Type Synchonous, brushless, PMG exciter
Facilities
Cooling No. of cells 3x8 3
Tower Type Counterflow. Induced draft
Vacuum mmHg abs 88.9 74.98
Condenser
Type Direct contact Surface type
Gas Capacity 3x50% SJE 1 x 100% SJE
Extraction Type Three stage Two stage

11. Process Diagram - MBPP
Double Flash – Conventional with Bottoming Cycle

12. Brief Description
Mahanagdong A & B Geothermal Power Plant
SITE A
These base load power plants have a
combined gross capacity of 180 MW
consisting of three 60 MW Toshiba
conventional steam turbines with shell-
and-tube type condensers and uses low
pressure steam (5 kg/cm2) for power
generation.
SITE B

13. Technical Description
Mahanagdong A & B Geothermal Power Plant
Unit Mahanagdong Main Mahanagdong Topping
Location Ormoc City, Leyte
varies fr 164.77 to 6.225 MW x 2 + 6.25
Contracted Capacity MW net 152.88 MW x 1
Commisioned Date July-97 September-97
Steam Pressure ksca 5.9 10.96
Steam Flow Rate TPH 1506.173 1227.6
Capacity MW 60 MW x 3 3.175 MW x 2 x 3
Turbine
Impulse-reaction,
Type Double flow,
Condensing Impulse, Backpressure
Capacity MVA 77.7 MVA x 3 8.24 MVA x 3
Power Generator Voltage kV 13.8 13.8
Station Type Synchonous, brushless, PMG exciter
Facilities No. of cells 7 cells x 2, 8 cells x1
Cooling
Counterflow. Induced
Tower
Type draft
Vacuum mmHg abs 65
Condenser
Type Shell and tube
Gas
Capacity 5 x 20% SJE, Hybrid
Extraction
Type Two stage SJE, hybrid

14. Process Diagram - MGAPP
Double Flash – Conventional with Topping Cycle

15. Process Diagram - MGBPP
Single Flash – Conventional with Topping Cycle

16. Brief Description
Leyte Optimization Power Plants
TOPPING PLANT
The Leyte Optimization Power Plant
consists of three topping cycle plants
(Mahanagdong A & B and Tongonan
1) and one bottoming cycle plant
(Malitbog). The topping plants consist
of OEC non-condensing steam
turbines that produce power while
BOTTOMING PLANT
reducing the steam high pressure to
the conditions required by the main
plants. The bottoming plant consists
of a GE conventional steam turbine
and condensing cycle unit that uses
low pressure steam from the “second
flash” of Malitbog brine for power
generation.

17. Technical Description
Leyte Optimization Power Plants
Tongonan - I Mahanagdong Malitbog
Unit Topping Topping Bottoming
Location Kananga, Leyte Ormoc City, Leyte Kananga, Leyte
6.225 MW x 2 +
Contracted Capacity MW net 5.65 MW x 3 6.25 MW x 1 13.35
Commisioned Date September-97 September-97 December-97
Steam Pressure ksca 11.32 10.96 5.96
Steam Flow Rate TPH 1008 1227.6 109.08
Turbine Capacity MW 2.875 MW x 2 x 3 3.175 MW x 2 x 3 14.56 MW x 1
Impulse, Impulse, Impulse,
Type
Backpressure Backpressure Condensing
Capacity MVA 7.7 MVA x 3 8.24 MVA x 3 20 MVA x 1
Power Generator Voltage kV 13.8 13.8 13.8
Station Type Synchonous, brushless
Facilities No. of cells 3
Cooling
Counterflow,
Tower
Type Induced draft
Vacuum mmHg abs 74.98
Condenser
Type Surface type
Gas Capacity 1 x 100% SJE
Extraction Type Two stage

18. Process Diagram – Leyte Optimization
BOTTOMING CYCLE AND MAIN PLANT CONFIGURATION
SEPARATOR VESSEL
MAIN PLANT
2 PH. LINE
TURBINE-GENERATOR
PRODUCTION
WELL
CONDENSER
COOLING TOWER
ROCK MUFFLER
BRINE LINE
FLASH VESSEL BRINE LINE
ROCK
MUFFLER
BOTTOMING PLANT
TURBINE-GENERATOR
STEAM LINE
CONDENSER
COOLING TOWER
RE-INJECTION WELL
RE-INJECTION WELL

19. Process Diagram – Leyte Optimization
TOPPING CYCLE AND MAIN PLANT CONFIGURATION
SEPARATOR VESSEL
TOPPING PLANT
2 PH. LINE ROCK MUFFLER
STEAM TURBINE-GENERATOR
LINE
MAIN PLANT
PRODUCTION
WELL
TURBINE-GENERATOR
SPCV
FLASH VESSEL
BRINE LINE
CONDENSER
COOLING TOWER
BRINE LINE
RE-INJECTION WELL

20. Brief Description
Mindanao Geothermal Power Plant
The Mindanao I and II Geothermal
Plant, a plant with dual-
flow, impulse reaction, condensing
turbine, a wet cooling tower, and
the latter being a double-flash and
with a net generation of 47MW
and 48.25MW, respectively. High
pressure and low pressure steam
are used. Both utilizes Mitsubishi
turbine.

21. Technical Description
Mindanao Geothermal Power Plant
Unit M1GPP M2GPP
Location Kidapawan, North Cotabato
Contracted Capacity MW net 47 48.25
Commisioned Date March-97 June-99
Land Area Hectares 2 1.8
Steam Pressure ksca 7.0 7.0/3.31
Steam Flow Rate TPH 385 343/47.4
Turbine Capacity MW 52.3 50.93
Single Pressure Dual Pressure
Type
Impulse-Reaction, Double flow, Condensing
Capacity MVA 67.8 67.8
Generator Voltage kV 13.8 13.8
Power Station Type Synchonous, brushless, PMG exciter
Facilities No. of cells 5 5
Cooling Tower
Type Counterflow. Induced draft
Vacuum mmHg abs 71.4 73.492
Condenser
Type Spray type, direct contact
2x50% SJE, 1x100% 1x60%/1x40% SJE,
Gas Extraction Capacity LRVP 1x100% LRVP
Two stage steam jet ejector, 3rd stage
Type vacuum pump

22. Brief Description
Northern Negros Geothermal Power Plant
The power plant is located at the western flank of Canlaon
Volcano in the island of Negros Occidental. It is a
conventional geothermal power generating plant, which
utilizes both the high pressure and low pressure geothermal
steam for power generation. The plant has a Gross
Capacity of 49.33 MW. It exports the generated power from
the 138 KV switchyard , via the 138 KV cross-country
Transmission Line and TransCo Bacolod Substation, and
finally into the TransCo power system and PNOC-EDC
customers.

23. Technical Description
Northern Negros Geothermal Power Plant
Gross Capacity : 49.37 MW (High Pressure Steam + Low Pressure Steam)
Net Capacity : 43.77 MW (High Pressure Steam + Low Pressure Steam)
High Pressure Steam Flow: 94.4 kg/s
Interface Pressure: 5.0 kg/cm2g
Non-Condensable Gases: 4.0 % w/w
Brine Supply
Brine Flow : 178 kg/s
Brine Pressure: 5.3 kg/cm2g
Brine Inlet Temperature: 160 deg. C
(Expected amount of flashed steam if above conditions are met: 13.88 kg/s)
Return Condensate: Flow=20 kg/s; pH=4.5-7.5
Guaranteed Net Plant Steam Rate (100% Load)
1st – 2nd year = 2.133 kg/MW-s
3rd – 5th year = 2.144 kg/MW-s

24. Process Diagram - NNGP

25. Technical Description
Palinpinon Geothermal Power Plant
• Palinpinon Geothermal Power plant I (Pal-I) located
at Barrio Puhagan, Valencia, Negros Oriental is
approximately twenty one (21) kms. south-west of
Dumaguete city. The plant covers an area of 2.7
hectares at an elevation of 696 meters above sea
level.
• Pal-I can generate a total of 112.5 MW from three
(3) 37.5 MW turbine generator units. All equipment
was supplied by Fuji Electric Co. as a full turnkey
project. Commercial operation started in June, July
and September, 1983 for units 1,2 and 3
respectively.
• Palinpinon Geothermal Power plant II (Pal II) is
composed of three (3) modular
plants, Nasuji, Okoy-5 and Sogongon. The modular
plants were constructed in response to the
increasing demand of the Cebu-Negros-Panay
grid. The total capacity is 80 MW from four units.
Commercial operation of Nasuji and Okoy-5 started
in January 31,1994 and December 22, 1994
respectively. Sogongon units 1 and 2 started
commercial operation in February 18, 1995 and
April 5, 1995 respectively.
25

26. Technical Description
Tongonan Geothermal Power Plant
• The Tongonan Geothermal
Power Plant (later renamed
Leyte Geothermal Power
Plant – I by NPC) started
commercial operation in
July, 1983. It has 3 turbine-
generator units with a total
installed capacity of 112.5
MW. Electricity produced is
mainly supplied to the
provinces of Leyte and
Samar. The largest costumer
is the Leyte Industrial
Complex in Isabel.
26

27. Technical Description
BacMan Geothermal Power Plant
• Bac-Man I Power Plant utilizes
geothermal energy from wells drilled
in the geothermal fields of
Manito, Albay and the city of
Sorsogon. The plant consists of two
(2) 55 MW units installed on a single
power station. Units 1 and 2 were
synchronized to the Luzon Grid on
September 10, 1993 and December
12, 1993, respectively.
• Bac-Man II is composed of two (2)
Units (20 MW per unit) modular
generating power plant designed to
utilize geothermal steam supplied by
EDC from wells drilled in Bacon-
Manito Geothermal Field. The
Cawayan Plant (Unit 3) and the
Botong Plant (Unit 4) started
operation in March 15, 1994 and April
27, 1998, respectively.
27

28. Performance Metrics
 Steam rate = Main+Auxiliary Steam
Plant Gross Output
 Availability factor = Period Hours – (SOH+FOH) * 100%
Period Hours
 Reliability factor = 1 - FOH _
(Period Hours – (FOH+SOH))
 Capacity factor = Actual Generation ___ * 100%
(Gross Capacity * Period Hours)
SOH = Scheduled Outage Hours
FOH = Forced Outage Hours
28

29. 29

30. VARIOUS ENERGY CONVERSION SYSTEMS: Temperatures in
the range of 85 to 170°C are the values at which the binary
system can be designed to operate through the selection of
appropriate working fluid.
Summary of Energy conversion systems.
GEOFLUID ENERGY WORKING COOLING SYSTEM
TEMP. °C CONVERSION FLUID
SYSTEM
100 Basic binary R134a Evaporative condenser
150 Advanced Binary Isobutane Air
200 Binary or Single Isobutane or Air or water
Flash steam
Source: Impact of Enhanced Geothermal Systems (EGS) on the United States in the 21st Century

31. EXAM III
• A 75MW geothermal power plant receives 600 TPH of
steam at full load. For the past year, the plant has
undergone 24-day PMS and incurred an outage of 10
hours for the first half and 4.5 hours for the second half
of the year. Considering that the plant has delivered
550,000,000 kWh of energy, compute for the steam rate
(kg/s / MW) at full load, reliability, and availability and
capacity factors. Assume that there are 365 days in a
year.
31

32. End of Presentation
Thank You!