440 MW Submarine Cable to LuzonPANAY C360 MWCap (MW) 93 200 MWDemand (H) 122Deficit (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)
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.
Technical Description Upper Mahiao Geothermal Power PlantUnit UMPP STG Bottoming OECs Brine OECLocation Kananga, LeyteContracted Capacity MW net 118.5 4 units 12 units 1 unitCommisioned 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
Process Diagram - UMPP Single Flash Binary Cycle
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.
Technical Description Malitbog Geothermal Power PlantUnit Malitbog Main Malitbog BottomingLocation Kananga, LeyteContracted Capacity MW net 216 13.35Commisioned 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
Process Diagram - MBPP Double Flash – Conventional with Bottoming Cycle
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
Technical Description Mahanagdong A & B Geothermal Power PlantUnit Mahanagdong Main Mahanagdong ToppingLocation Ormoc City, Leyte varies fr 164.77 to 6.225 MW x 2 + 6.25Contracted Capacity MW net 152.88 MW x 1Commisioned 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
Process Diagram - MGAPP Double Flash – Conventional with Topping Cycle
Process Diagram - MGBPP Single Flash – Conventional with Topping Cycle
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.
Technical Description Leyte Optimization Power Plants Tongonan - I Mahanagdong MalitbogUnit Topping Topping BottomingLocation 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 13.35Commisioned 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
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
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
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.
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
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.
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
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
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
VARIOUS ENERGY CONVERSION SYSTEMS: Temperatures inthe range of 85 to 170°C are the values at which the binarysystem can be designed to operate through the selection ofappropriate 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
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