Doosan Heavy Industries & Construction DOOSAN GAS TURBINES

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1 Doosan Heavy Industries & Construction DOOSAN GAS TURBINES Gas Turbines have played a leading role in power generation with high performance, reliability, fuel flexibility, low emissions and compactness being a few of their main characteristics. Today s Gas Turbines stand at an advanced State-of-the-Art technology, providing highly efficient continuous operation, covering both base load and peak load operating conditions. DOOSAN is an approved manufacturer of the M501G, M501F, M701F and M701 heavy duty Gas Turbine models under a Technology License Agreement with Mitsubishi Heavy Industries, Ltd of Japan. DOOSAN experience includes the Yeongwol Combined Cycle power plant in Korea, built in 2008, featuring M501F Gas Turbines. DOOSAN has since supplied the M501GAC and M501F Gas Turbines for the Pochen Combined Cycle Power Plant and Yangju & Sejong Combined Heat & Power projects.

2 DOOSAN HEAVY INDUSTRIES & CONSTRUCTION Gas TurbIne application Simple Cycle Performance Description 60Hz (3600rpm) 50Hz (3000rpm) M501F M501G M501GAC M701 M701F Application Output, Gas Turbine Heat Rate, Btu/kWh Efficiency, % No.of stage Compressor Turbine Pressure ratio Exhaust Temp, Integrated Gasification Combined Cycle Exhaust Gas Flow, kg/s No.of Combustor NOTE. 1. PErFOrMANCE ArE ThE POWEr ratings AT ThE GENErATOr TErMiNAls ANd ArE based ON ThE use OF NATurAl GAs FuEl WiTh standard inlet ANd EXhAusT duct losses. Combined Cycle Performance Simple Cycle Model Net Plant Output Net Plant Efficiency Heat Rate (kj/kwh) GTG Power STG Power Number &Type GasTurbine M701DA 1 on 1 212,500 kw 51.4 % 7, ,100 kw 70,400 kw 1 x M701 M701DA 2 on 1 426,600 kw 51.6 % 6, ,200 kw 142,400 kw 2 x M701 M701DA 3 on 1 645,000 kw 51.8 % 6, ,300 kw 218,700 kw 3 x M701 Combined Cycle M701F 1 on 1 416,400 kw 59.0 % 6, ,800 kw 142,600 kw 1 x M701F M701F 2 on 1 835,600 kw 59.2 % 6, ,600 kw 288,000 kw 2 x M701 M501F 1 on 1 285,100 kw 57.1 % 6, ,700 kw 102,400 kw 1 x M501F M501F 2 on 1 572,200 kw 57.3 % 6, ,400 kw 206,800 kw 2 x M501F M501F 3 on 1 858,100 kw 57.5 % 6, ,100 kw 310,000 kw 3 x M501F Congeneration M501G 1 on 1 398,900 kw 58.4 % 6, ,400 kw 134,500 kw 1 x M501G M501G 2 on 1 800,500 kw 58.6 % 6, ,800 kw 271,700 kw 2 x M501G M501GAC 1 on 1 404,000 kw 59.2 % 5, ,000 kw 135,000 kw 1 x M501GAC M501GAC 2 on 1 810,700 kw 59.4 % 5, ,000 kw 272,700 kw 2 x M501GAC NOTE. 1. All ratings ArE based ON iso CONdiTiONs. 2. ALL RATINGS AT THE GENERATOR TERMINALS ARE BASED ON THE USE OF NATURAL GAS FUEL. Mechannical Drive

3 DOOSAN Gas TurbInes Multi-Stage axial-flow air CoMpreSSor FEATURES Variable inlet guide vanes. Horizontally split casing giving access to internal parts. Compressor blade rings. Individually removable stainless steel blading. Accessible pressure-lubricated, pivoted-pad journal bearing. COMBUSTION SYSTEM INCLUDES THE FOLLOWING Multiple can-type combustors in a circular array. Combustors removable with insulated cylinder cover in place. Low emissions design. Optional multiple fuels capability. Ignition system including retractable igniters. Model M501F Four-Stage reaction type turbine FEATURES Advanced cooling technology. Horizontally split casing giving access to internal parts. Alloy turbine blades individually removable. Cooled by air cooler with cooling air filtered. Individual first stage vanes removable with cylinder cover in place. The M501G includes a host of long-proven MHI design elements, such as two-bearing rotor support, cold-end drive with axial exhaust, tangential exhaust bearing strut support, field-removable blades with the rotor in position, rotor cooling air taken off board from the compressor and cooled prior to reentry into the turbine and horizontally split casings throughout. Model M501G M501G during assembly. Blades can be changed and the rotor balanced at site.

4 DOOSAN GAS TURBINES GAS TURBINE COMPONENTs Casings All engine casings are horizontally split to facilitate maintenance with the rotor in place. Individual inner casings (blade rings) are used for each turbine stationary stage and can be readily replaced or serviced with the rotor in place. Similar blade rings have been added in the compressor seventh stage through last stage. Compressor Combustor Cylinder Rotor Assembly Similar to previous 501/701 series designs, the single rotor is made up of compressor and turbine components. The M501/M701 rotor is a bolted construction supported by two tilting-pad bearings. The thrust bearing is also a tilting pad design. The compressor rotor is comprised of a number of elements that are spigotted and bolted together by 12 through-bolts. Compressor The compressor blade path is designed using a threedimensional flow-field analysis computer program. Rotor blades are double circular arc designs in the first four stages. Stationary blading, fabricated into two 180 degree diaphragms per stage for easy removal, maintains the highly efficient inner-shroud sealing system. Turbine 5 Axle High Speed Milling Machine The M501/M701 turbine design maintains moderate aero-dynamic loadings in spite of the increased inlet temperature through the design of a 4-stage turbine. Improvements in aero-dynamic airfoil shapes have been made possible by utilization of a fully three-dimensional flow analysis computer program. The first and second stage vanes on the turbine rotor are free-standing. The third and fourth stages have integral shrouds. Turbine Blade Turbine Vane

5 DOOSAN HEAVY INDUSTRIES & CONSTRUCTION CombusTIon / CoolInG system Combustion System The M501/M701 combustion system consists of 16 and 20 can-annular combustors, respectively. The combustion system is a dual-fuel (natural gas and no. 2 distillate oil) system with provisions for steam or water injection for emissions control and power augmentation. A new premix lean-burn hybrid combustor is applied to meet the existing and new NOx emission limitations around the world. The hybrid combustor features a two-stage burner assembly and a bypass valve which directs a portion of the compressor delivery air directly into the transition piece to enhance flame stability during starting and to maintain desired fuel/air ratio during loading. This unique valving system then is modulated to full-closed at full load. air Cooled type CoMbuSter SteaM Cooled type CoMbuSter Turbine Cooling System The cooling system for the turbine section consists of a rotor cooling circuit and four stationary cooling circuits. Rotor cooling air is provided by compressor discharge air extracted from the combustor shell. Direct compressor discharge air is used to cool the stage 1 vanes. Compressor bleed air from HP, IP and LP stages provides cooling air to turbine blade ring cavities at stages 2, 3, and 4 respectively. This supply of bleed air also cools the stage 2, 3, and 4 vane and ring segments and provides cooling air for the turbine interstage disc cavities. turbine rotor Cooling Filiter #4 stage #3 stage #2 stage Cooler Rotor Cooling

6 DOOSAN GAS TURBINES GAS TURBINE ConTrol system Control System Operation of the M501/M701 gas turbine and the combined cycle plant is supported by the Mitsubishi plant control system DIASYS series. DIASYS netmation is the latest Mitsubishi Heavy Industries Gas Turbine and total plant control system that unites State-of-the-Art Info-com technology, MHI s rich experience as a plant manufacturer, and control technology for maximum satisfaction of customer demands such as high reliability, economy, advanced automation, and easy maintenance. Typical Gas Turbine Control system Configuration 2 Site OPS (Operator Station) Human I/F for monitoring & operation Graphic, Trend, Alarm Control Plate Control Logic Monitoring 3 5 Browser OPS Internet based CRT operation Graphic, Trend, Alarm Control Plate Control Logic Monitoring ACS (Accessory Station) Data store & management, and Web server, Gateway Reports, Trip Log, Event Log, Operator Action Log, Flight Recorder 1 MPS (Multiple Process Station) I/O processing to the field Control logic Execution Short term data preservation 4 EMS (Eng. & Maint. Station) Maintenance of whole system by DIasys-IDol++ System configuration HML setting Graphic creation Object data base modification Drawing management Doosan Heavy Industries & Construction Seoul office 465 Gangnam-daero, Seocho-Gu, Seoul Korea Tel Fax HeaD office and CHangwon plant 22 DoosanVolvo-ro, Seongsan-Gu Korea Changwon, Gyeongnam Korea Tel , 7114 Fax , 5552