Steam Turbine Fact Sheet

GE Power & WaterSteam TurbinesExcellent Reliability and Performance, in Every Size and ApplicationSTEAM TURBINESSteam turbines from GE deliver excellent customer value, as they are specifically configured to convert the exhaust energy of GE gas turbines in varied plant and site conditions. A combination of highly developed steam path technology, advanced sealing features, compact turbine sections and a broad portfolio of last-stage buckets means superb power generation performance.In every size and application, GE steam turbines provide high reliability, sustained high efficiency and ease of maintenance. Our advanced technologies—including abradable coatings, steam path aerodynamics, and welded rotor construction—contribute to world-class plant operability and combined cycle performance. On-demand startup and turndown assure ease of cycling on and off the grid in sync with fluctuating demands.GE has developed and applied advanced steam turbine technology since 1901, and has deployed more than 530 GW of steam turbine capacity in more than 6,000 installed units since then. With tremendous applications flexibility, our steam turbines operate in combined cycle, fossil-fired, integrated gasification combined cycle, renewable, industrial, petrochemical and nuclear plants worldwide.High-Efficiency ConfigurationsWhatever the configuration, GE steam turbines provide high-efficiency returns. The D650 turbine delivers the highest level of energy conversion efficiency—more than 42 percent—and operability for HA gas turbines. Separate high- and intermediate-pressure sections enable excellent section efficiencies and reduce leakages • The single-shaft configuration incorporates a clutch that enables high operational flexibility.• A650, D600 and D650 steam turbines have less-than-30-minute plant starts, and allow for daily starts and stops.• Turbines operate at high-pressure (HP) and intermediate-pressure (IP) inlet temperatures up to 1,112ºF.• D650 steam turbines have the flexibility to adapt to a variety of bottoming cycle conditions.• A200 and D200 steam turbines have HP and LP sections that are intended for main inlet steam pressure up to 1,550 psi and a main steam temperature up to 1,000ºF.• D600 steam turbines incorporate enhanced features which improve constructability and reduce installation time by allowing the performance of parallel operations.and fixed losses. The A650 and D600 steam turbines offer efficiencies up to 41.5 and 42 percent, respectively. They are developed to run at up to 2,400 psi main steam inlet pressure and are sized around F- and HA-class gas turbines. Offering efficiencies up to 39.5 and 40 percent, respectively, the A450 and D400 steam turbines, which also are sized around F- and HA-class gas turbines, are targeted to run at up to 1,800 psi main steam inlet pressures. The A200 and D200 non-reheat steam turbines (up to 35.5 and 36.5 percent efficiency, respectively) are applied to combined cycle plants with low-cost fuel and at low annual operating hours. They sync up with GE’s B- and E-class gas turbines.Leading Technology for Superior PerformanceThe mix of advanced steam turbine technologies delivers world-class overall performance. The inner carriers of the double shell architecture are designed to reduce thermal distortion during startup and shutdown, so radial clearances and performance are maintained over time. Drum rotor construction with high reaction blading sets the steam path diameter to deliver high performance for a given steam flow. In addition, the rotor shaft diameter can be maintained for reduced rotor flexibility, stable rotor dynamics, and improved clearance control.To achieve high performance, radial clearances and sealing must be maintained. GE steam turbines reduce leakage and control clearances within the steam path through a combination of labyrinth, brush, abradable and active retractable sealing technologies. Integral cover buckets (ICBs) are used throughout the turbine sections to maintain efficient bucket and nozzle sealing and provide superior mechanical damping and tip sealing control. The ICBs also provide continuous circumferential sealing and multiple seal teeth at each stage.Features and BenefitsAll models deliver exceptional performance, reliability and availability in today’s demanding energy environment. In addition:• Last stage buckets, in 50 Hz up to 55 inches and in 60 Hz up to 45 inches, are effective in many combined cycle configurations and provide a wide range of annulus areas to accommodate a range of steam flows and site conditions. These axial entry last stage buckets have elevated exhaust pressure capability.• A650 steam turbine plant layouts are compact and cost-effective in both multi-shaft and single-shaft configuration.Steam Turbines Excellent Reliability and Performance, in Every Size and ApplicationSteam Turbine Product OverviewModel Features Technology ExperienceA650 • HP inlet pressure up to 2400 psi• HP inlet temperature up to 1112°F• IP inlet temperature up to 1112°F• Shaft efficiency >41%• Output up to 220 MWHP Section• High reaction technology• Advanced aero and sealing• High power densityIP and LP Sections• Advanced aero and sealing• Axial entry last stage buckets with elevated exhaust pressure capability60 Hz• More than 30 units• First COD 199750 Hz• More than 20 units• First COD 1999Operability• Enables less than 30-minute plant starts• Daily starts and stopsD600 • HP inlet pressure up to 2400 psi• HP inlet temperature up to 1112°F• IP inlet temperature up to 1112°F• LP Section with either side or down exhaust• Shaft efficiency >42%• Up to 500 MWHP Section• High reaction technology• Advanced aero and sealing• High power densityIP and LP Sections• High reaction drum rotor• Advanced aero and sealing• Axial entry last stage buckets with elevated exhaust pressure capability• 2-Flow and 4-Flow LP arrangements• Side or down exhaust configuration60 Hz• More than 150 units• First COD 196950 Hz• More than 80 units• First COD 1982Operability• Enables less than 30-minute plant starts• Daily starts and stopsD650 • Modular, three casing, four bearing configuration• Supporting up to 2400 psi HP throttle pressures• HP and IP inlet temperatures from 1050°F to 1112°F• Output from 200-600 MW• Shaft efficiency >42.5%High Pressure (HP) and Intermediate Pressure (IP) Modules• High reaction technology• Advanced aero and sealing• Increased power densityLow Pressure (LP) Module• High reaction drum rotor• Axial entry last stage buckets with elevated exhaust pressure capability• Cooling tower or air-cooled condensing configurations• 2-Flow and 4-Flow LP arrangements• Side or down exhaust configurationPerformance• GE’s highest level of performanceFlexibility• Adapts to a variety of bottoming cycle conditionsOperability• Enables less than 30-minute plant starts Copyright © 2014 General Electric Company. All rights reserved.GEA31250 (06/2014)To find out more about this offering, contact your GE Power & Water sales representative or visit www.powergen.gepower.com