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

被引：30

作者：

Maziasz, P. J. ^{[1
]}

Pint, B. A. ^{[1
]}

Shingledecker, J. P. ^{[1
]}

Evans, N. D. ^{[1
]}

Yamamoto, Y. ^{[1
]}

More, K. L. ^{[1
]}

Lara-Curzio, E. ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2007年 / 32卷 / 16期

关键词：

heat-exchanger; high-temperature; heat-resistant alloys; foil; sheet; austenitic stainless alloys; oxidation resistance; creep-resistance;

D O I：

10.1016/j.ijhydene.2006.08.018

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 degrees 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 degrees C, but has suffered from both of these kinds of degradation at 650 degrees 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. Published by Elsevier Ltd on behalf of the International Association for Hydrogen Energy.

引用

页码：3622 / 3630

页数：9

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