Advanced alloys for compact, high-efficiency, high-temperature heat-exchangers

P. J. Maziasz; B. A. Pint; J. P. Shingledecker; N. D. Evans; Y. Yamamoto; K. L. More; E. Lara-Curzio

doi:10.1016/j.ijhydene.2006.08.018

Advanced alloys for compact, high-efficiency, high-temperature heat-exchangers

P. J. Maziasz, B. A. Pint, J. P. Shingledecker, N. D. Evans, Y. Yamamoto, K. L. More, E. Lara-Curzio

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

Oak Ridge National Laboratory (ORNL) has conducted research and development for several years which has been focused on the behavior and performance improvements of sheets and foils of various alloys for compact heat-exchangers (recuperators) for advanced microturbines. The performance and reliability of such thin sections are challenged at 650-750 ^{{ring operator}} C by fine grain size causing excessive creep, and by moisture effects greatly enhancing oxidation attack in exhaust gas environments. Standard 347 stainless steel has been used successfully at or below 600 ^{{ring operator}} C, but has suffered from both of these kinds of degradation at 650 ^{{ring operator}} C and above. Alloys have been identified which can have very good properties for such heat-exchangers, especially with careful control of microstructure during processing, including alloy 625, HR120 and the new AL20-25+Nb. These alloys, and the mechanistic understanding behind their behavior, are also applicable to achieving the better heat-exchanger technology needed for fuel cells or other high-temperature, clean-energy applications.

Original language	English
Pages (from-to)	3622-3630
Number of pages	9
Journal	International Journal of Hydrogen Energy
Volume	32
Issue number	16
DOIs	https://doi.org/10.1016/j.ijhydene.2006.08.018
State	Published - Nov 2007

Funding

Cooperation of Capstone Turbines, Inc., and Ingersoll–Rand Energy Systems, with the materials research efforts at ORNL is greatly appreciated. Collaboration with ATI Allegheny–Ludlum (Charles P. Stinner) is appreciated. Materials provided by Haynes International, Inc. (Dwayne Klarstrom) are appreciated. Research was sponsored by the U.S. Department of Energy, Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Distributed Energy and Electrical Reliability, and at the SHaRE User Facility by the Division of Materials Sciences, Office of Basic Energy Sciences, under contract DE-AC05-00R22725 with UT-Battelle, LLC.

Keywords

Austenitic stainless alloys
Creep-resistance
Foil
Heat-exchanger
Heat-resistant alloys
High-temperature
Oxidation resistance
Sheet

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abstract = "Oak Ridge National Laboratory (ORNL) has conducted research and development for several years which has been focused on the behavior and performance improvements of sheets and foils of various alloys for compact heat-exchangers (recuperators) for advanced microturbines. The performance and reliability of such thin sections are challenged at 650-750 {ring operator} C by fine grain size causing excessive creep, and by moisture effects greatly enhancing oxidation attack in exhaust gas environments. Standard 347 stainless steel has been used successfully at or below 600 {ring operator} C, but has suffered from both of these kinds of degradation at 650 {ring operator} C and above. Alloys have been identified which can have very good properties for such heat-exchangers, especially with careful control of microstructure during processing, including alloy 625, HR120 and the new AL20-25+Nb. These alloys, and the mechanistic understanding behind their behavior, are also applicable to achieving the better heat-exchanger technology needed for fuel cells or other high-temperature, clean-energy applications.",

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author = "Maziasz, {P. J.} and Pint, {B. A.} and Shingledecker, {J. P.} and Evans, {N. D.} and Y. Yamamoto and More, {K. L.} and E. Lara-Curzio",

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AU - Pint, B. A.

AU - Shingledecker, J. P.

AU - Evans, N. D.

AU - Yamamoto, Y.

AU - More, K. L.

AU - Lara-Curzio, E.

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AB - Oak Ridge National Laboratory (ORNL) has conducted research and development for several years which has been focused on the behavior and performance improvements of sheets and foils of various alloys for compact heat-exchangers (recuperators) for advanced microturbines. The performance and reliability of such thin sections are challenged at 650-750 {ring operator} C by fine grain size causing excessive creep, and by moisture effects greatly enhancing oxidation attack in exhaust gas environments. Standard 347 stainless steel has been used successfully at or below 600 {ring operator} C, but has suffered from both of these kinds of degradation at 650 {ring operator} C and above. Alloys have been identified which can have very good properties for such heat-exchangers, especially with careful control of microstructure during processing, including alloy 625, HR120 and the new AL20-25+Nb. These alloys, and the mechanistic understanding behind their behavior, are also applicable to achieving the better heat-exchanger technology needed for fuel cells or other high-temperature, clean-energy applications.

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KW - Heat-exchanger

KW - Heat-resistant alloys

KW - High-temperature

KW - Oxidation resistance

KW - Sheet

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Advanced alloys for compact, high-efficiency, high-temperature heat-exchangers

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