The Oak Ridge National Laboratory (ORNL) has been involved in research and development related to improved performance of recuperators for industrial gas turbines since about 1996, and in improving recuperators for advanced microturbines since 2000. Recuperators are compact, high efficiency heat-exchangers that improve the efficiency of smaller gas turbines and microturbines. Recuperators were traditionally made from 347 stainless steel and operated below or close to , but today are being designed for reliable operation above . The Department of Energy (DOE) sponsored programs at ORNL have helped defined the failure mechanisms in stainless steel foils, including creep due to fine grain size, accelerated oxidation due to moisture in the hot exhaust gas, and loss of ductility due to aging. ORNL has also been involved in selecting and characterizing commercial heat-resistant stainless alloys, like HR120 or the new , that should offer dramatically improved recuperator capability and performance at a reasonable cost. This paper summarizes research on sheets and foils of such alloys over the last few years, and suggests the next likely stages for manufacturing recuperators with upgraded performance for the next generation of larger advanced microturbines.
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October 2006
Technology Review
Overview of Creep Strength and Oxidation of Heat-Resistant Alloy Sheets and Foils for Compact Heat Exchangers
Philip J. Maziasz,
e-mail: maziaszpj@ornl.gov
Philip J. Maziasz
Oak Ridge National Laboratory
, Metals and Ceramics Division, Oak Ridge, TN 37831-6115
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John P. Shingledecker,
John P. Shingledecker
Oak Ridge National Laboratory
, Metals and Ceramics Division, Oak Ridge, TN 37831-6115
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Bruce A. Pint,
Bruce A. Pint
Oak Ridge National Laboratory
, Metals and Ceramics Division, Oak Ridge, TN 37831-6115
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Neal D. Evans,
Neal D. Evans
Oak Ridge National Laboratory
, Metals and Ceramics Division, Oak Ridge, TN 37831-6115
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Yukinori Yamamoto,
Yukinori Yamamoto
Oak Ridge National Laboratory
, Metals and Ceramics Division, Oak Ridge, TN 37831-6115
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Karren More,
Karren More
Oak Ridge National Laboratory
, Metals and Ceramics Division, Oak Ridge, TN 37831-6115
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Edgar Lara-Curzio
Edgar Lara-Curzio
Oak Ridge National Laboratory
, Metals and Ceramics Division, Oak Ridge, TN 37831-6115
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Philip J. Maziasz
Oak Ridge National Laboratory
, Metals and Ceramics Division, Oak Ridge, TN 37831-6115e-mail: maziaszpj@ornl.gov
John P. Shingledecker
Oak Ridge National Laboratory
, Metals and Ceramics Division, Oak Ridge, TN 37831-6115
Bruce A. Pint
Oak Ridge National Laboratory
, Metals and Ceramics Division, Oak Ridge, TN 37831-6115
Neal D. Evans
Oak Ridge National Laboratory
, Metals and Ceramics Division, Oak Ridge, TN 37831-6115
Yukinori Yamamoto
Oak Ridge National Laboratory
, Metals and Ceramics Division, Oak Ridge, TN 37831-6115
Karren More
Oak Ridge National Laboratory
, Metals and Ceramics Division, Oak Ridge, TN 37831-6115
Edgar Lara-Curzio
Oak Ridge National Laboratory
, Metals and Ceramics Division, Oak Ridge, TN 37831-6115J. Turbomach. Oct 2006, 128(4): 814-819 (6 pages)
Published Online: February 1, 2005
Article history
Received:
October 1, 2004
Revised:
February 1, 2005
Citation
Maziasz, P. J., Shingledecker, J. P., Pint, B. A., Evans, N. D., Yamamoto, Y., More, K., and Lara-Curzio, E. (February 1, 2005). "Overview of Creep Strength and Oxidation of Heat-Resistant Alloy Sheets and Foils for Compact Heat Exchangers." ASME. J. Turbomach. October 2006; 128(4): 814–819. https://doi.org/10.1115/1.2187525
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