Ceramic Energy: Taking the Heat in Power Turbines

April 1, 2006
/ Print / Reprints /
ShareMore
/ Text Size+
Siemens Power Generation, Inc. is proving that ceramics are ideal materials for power turbine applications. Various liner materials had been used in earlier generations of its SGT5-4000F engine family, but ceramic heat shields allow a large amount of cooling air to be saved, thus enhancing the efficiency of the turbine and allowing NOx emissions to be reduced.



Siemens Power Generation, Inc., based in Orlando, Fla., is proving that ceramics are ideal materials for power turbine applications. The company uses a combination of monolithic ceramic and ceramic-coated metal heat shields to line the combustion chamber of its SGT5-4000F engine. Various liner materials had been used in earlier generations of this engine family, but the ceramic heat shields allow a large amount of cooling air to be saved, thus enhancing the efficiency of the turbine and allowing NOx emissions to be reduced. The heat shield attachment elements are protected against the hot combustion gases by cooling air distributed through many minute cooling holes. Millions of operating hours have been successfully accumulated on these parts.

In addition to the combustor heat shields, the company extensively relies on advanced thermal barrier coatings for hot section blades, vanes and other components to further improve efficiency, increase power output and reduce emissions. Ongoing efforts to improve thermal barrier coating performance are being funded both internally by Siemens and by the U.S. Department of Energy (DOE), the National Institute of Standards and Technology (NIST) and other government agencies.

Siemens is also developing ceramic matrix composites for future gas turbine applications. These composites offer improvements in strength and reliability over conventional monolithic materials and can be used more extensively throughout the turbine hot section. Collaboration partners include ATK-COI Ceramics Inc. and Solar Turbines in San Diego, Calif., as well as government agencies, national laboratories, universities, and other end users. An initial test product (a Solar Turbines combustor liner) has exceeded 19,000 operating hours in a field engine-a world record. Expansion to other applications is planned.

For more information about these developments, contact Siemens Power Generation, Inc. at (407) 736-7381 or click on the link below to visit the company's website.

Links

Did you enjoy this article? Click here to subscribe to Ceramic Industry Magazine.

You must login or register in order to post a comment.

Multimedia

Videos

Image Galleries

April 2014 Issue Highlights

Our April 2014 issue is now available!

Podcasts

Sapphire: An Extreme Performer

Ian Doggett of Goodfellow and CI Editor Susan Sutton discuss the benefits and opportunities provided by industrial sapphire.

More Podcasts

Ceramic Industry Magazine

CI August 2014 cover

2014 August

Explore technical ceramics, glasses and refractories in our August issue!

Table Of Contents Subscribe

THE CERAMIC INDUSTRY STORE

M:\General Shared\__AEC Store Katie Z\AEC Store\Images\Ceramics Industry\handbook of advanced ceramics.gif
Handbook of Advanced Ceramics Machining

Ceramics, with their unique properties and diverse applications, hold the potential to revolutionize many industries, including automotive and semiconductors.

More Products

Clear Seas Research

Clear Seas ResearchWith access to over one million professionals and more than 60 industry-specific publications,Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.

Directories

CI Data Book July 2012

Ceramic Industry's Directories including Components, Equipment Digest, Services, Data Book & Buyers Guide, Materials Handbook and much more!

STAY CONNECTED

facebook_40px twitter_40px  youtube_40pxlinkedin_40google+ icon 40px