STEAM TURBINE RETROFITS

Transcription

1 STEAM TURBINE RETROFITS

2 Experience And Synergies Make The Difference Load demand, financial pressures and aging steam turbine generators have created the need to extend longevity and reliability. MD&A / Hitachi offer competitive solutions for addressing reliability, life extension and capacity demands by providing retrofit solutions for large steam turbine generators. MD&A / Hitachi steam turbine retrofits capture the latent potential of power plant auxiliary systems and retain thermal performance, providing the cost-effective recovery and enhancement of turbine efficiency. Highly regarded innovations in steam turbine technology have set Hitachi apart as a leader in global power generation equipment, establishing Hitachi as the fastest growing manufacturer of steam turbine capacity in North America. WORLDWIDE INSTALLED CAPACITY

3 Impulse / Reaction Steam Turbine Retrofits MD&A / Hitachi offer comprehensive impulse and reaction steam turbine retrofit packages for HP, HIP, IP and LP turbines. MD&A / Hitachi provide owners with options to address needs for single and multi-section retrofits and upgrades. MD&A / Hitachi steam turbine retrofit options support: HIP opposed-flow turbines with four-flow LP sections HP / IP individual configuration turbines with four-flow LP sections HIP opposed flow turbines in single casing, double-flow LP section Reaction type large steam turbines HP, IP, HIP, LP Rotors Scope May Include: Advanced, high-efficiency Continuous Cover Blades (CCB s) for increased output and reliability Redesigned high-efficiency HP first stage Advanced steampath laminar nozzle blades and diaphragms for improved efficiency Boreless, monoblock rotors incorporating stressreducing geometries Advanced technology Guardian Packing and Vortex Shedder seals for reduced leakage Redesigned exhaust hood diffuser to reduce static pressure losses Flange-type seal for expansion pipe at inner casing steam inlet MD&A / Hitachi Retrofit Advantages Improved reliability and efficiency Increased capacity Extended intervals between maintenance Design that captures latent cycle potential Worldwide retrofit project experience Ease of serviceability 24-Hour access to engineering support High-Efficiency Uprates Redesigned First Stage STEAM TURBINE RETROFITS Rotors Casings Diaphragms Blades

4 Advanced Turbine Design Hitachi s Advanced Designs Improve Performance By: Increased ratio of blade length to axial width - Reducing blade / nozzle end-wall losses Optimization of stage reaction - Reducing differential pressure across each stage Reduced root diameter for increased stage count A modified blade profile - Reducing blade / nozzle profile losses Incorporating Guardian Packing and Vortex Shedder seals Usage of Continuous Cover Blades (CCB s) Optimized Blade Cover CCB Technology Boreless Monoblock Rotors Advanced Vortex Nozzles Nozzle Design CAD Engineering Portable Machining Component Repair MD&A / Hitachi maintain state of the art manufacturing and service facilities throughout Japan, Canada and the USA, including a 100,000 sq. ft. turbine-generator repair facility located in St. Louis, MO. These combined resources allow MD&A / Hitachi to rapidly provide high quality turbine components and services. Focusing on the details has made MD&A / Hitachi a recognized name in the global power generation industry. STEAM TURBINE RETROFITS Rotors Casings Diaphragms Blades

5 Continuous Cover Blades High reliability Mono-block blade structure Interlocking integral covers Elimination of tie-wire at mid-span, where applicable - Reduced vane stress levels Less susceptible to stress corrosion cracking (SCC) - Fewer locations for deposits Higher back pressure operation Stellite erosion shield L-0 Blades L-1 Blades , Guardian Packing & Vortex Shedder Seals Applicable to any OEM design turbine Prevent damage to seal teeth during moderate rub(s) Operate within any labyrinth seal ring application or location Function effectively under all pressure conditions Demonstrated unit reliability and seal degradation performance Contribute to extended overhaul intervals Retain unit heat rate longer than conventional seals Increase unit efficiency by as much as 2%-5% Guardian Packing Vortex Shedders STEAM TURBINE RETROFITS Rotors Casings Diaphragms Blades

6 Recognized Project Experience Project management Technical direction and field engineering Craft labor and supervision On-site critical path scheduling Comprehensive portable machining capabilities Turnkey main valve services Balance and alignment engineers Component manufacturing Performance testing Complete generator services Distortion correction services Instrumentation and control systems engineering Life assessment engineering As a provider of turbine-generator components and services, MD&A is known for its ability to provide experienced engineers and comprehensive solutions. More than two decades of outage and upgrade management experience and many of the best minds in the industry have helped MD&A build on a reputation as a premier provider of engineering and outage services. HP Valve Repair Generator Field Rewinds Shell Repair Journals & Bearings Stator Rewinds Rotor Replacement STEAM TURBINE RETROFITS Outage Services Generator Machining Valves

7 For More Information, Please Call: (518)

8 STEAM TURBINE RETROFITS 29 British American Blvd. Latham, NY Phone: Fax: Mechanical Dynamics & Analysis, Ltd., 2008 A Wholly-Owned Subsidiary of Hitachi America Limited