GAS POWER SYSTEMS CATALOG I Power Generation Technology Leadership POWER GENERATION TECHNOLOGY-DRIVEN PRODUCT AND PLANT LEADERSHIP
This catalog documents the accomplishments of thousands of engineers devoted to developing more efficient, cleaner, and cost-effective conversion of fuel to power. This effort starts years before a product or product improvement is introduced; it begins when fundamental technology research is completed in one of GE’s many global research centers—in many cases with the support of the United States Department of Energy. Our technology research is centered on providing better performance, which then results in both lower fuel costs and increased power density for economy of scale. In today’s gas turbine combined cycle technology, approximately 70 percent of the opportunity for performance improvement is related to the gas turbine, with the remaining 25 percent associated with the steam turbine, generator and plant equipment. In addition to performance, we have greatly improved the number and types of fuel that can be burned. This means that you have the opportunity to operate on the cheapest fuels available.
The following table provides a brief snapshot of the technologies that have driven product improvements described in this catalog.
Technology Coatings
Customer Benefits
• Approximately 2 percent output and 0.4 percent heat rate improvement
• Hotter temperatures and/or less cooling flow • Better parts life expectancies
Applicable to HA, 9E.04, 7F.05, 6F.03 and 6F.01 gas turbines
Sealing
• Approximately 0.5 percent output and 0.1 percent heat rate improvement
• Reduced leakage between stationary and rotating parts
• Improved part life expectancies (since hot gases are kept in the flow path)
Applicable to HA, 9E.04, 7F.05, 6F.03 and 6F.01 gas turbines
Steam Turbine Last Stage
• Enhanced plant efficiency driven through improvements to last stage buckets (blades)
• Approximately 0.3 percent heat rate improvement
• Reduced costs and increased flexibility for side or down exhaust
Applicable to HA- and F-class power plants Fuel Flexibility
• Lower water usage on distallate fuel resulting in over 5 percent better heat rate
• Lower cost fuels such as ethane and crude oil The future remains bright...
Advanced Testing
• GE is collaborating with Notre Dame University on a high-speed research turbine to focus on unsteady flow losses.
• GE and the University of Munich are working together to advance compressor technology.
• New aeroderivative technology is expected to improve combined cycle efficiency by 1 percent in the next decade.
Ceramic Material
• A leader in the development of advanced ceramic materials for gas turbines, GE has accumulated more than 30,000 hours of operation using ceramic components.
• GE’s 7HA gas turbine is being tested with a ceramic shroud, and we will offer a 7F ceramic shroud uprate as well.
• Ceramic materials offer increased efficiency due to the ability to operate as much as 500°F hotter than metal super alloys.
• Arabian Super Light crude oil operation offered in Middle East • Full scale low water usage combustion testing • As high as 100 percent ethane operation offered
• First large turbine rig designed to reduce rotor leakage
• New high-resolution unsteady fluid dynamics computer modeling
• Thermal mapping testing to confirm performance benefits • 3-D features resulting in sculptured shapes
• Largest last stage bucket currently offered • Curved axial dovetail to manage stress
• Integral cover and mid-span shroud for enhanced stiffness and vibration control
Accomplishments
• 600°F temperature increase in the past decade • New plasma spray coating process • New higher temperature abradable coatings
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