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Title: Candidate alloys for cost-effective, high-efficiency, high-temperature compact/foil heat-exchangers

Abstract

Solid oxide fuel cell (SOFC) and molten carbonate fuel cell (MCFC) systems operate at high temperatures (up to 1000 C and 650 C, respectively), which makes them especially attractive sources for combined heat and power (CHP) cogeneration. However, improvements in the efficiency of heat exchange in these fuel cells require both development and careful processing of advanced cost-effective alloys for use in such high-temperature service conditions. The high-temperature properties of both sheet and foil forms of several alloys being considered for use in compact heat-exchangers (recuperators) have been characterized. Mechanical and creep-rupture testing, oxidation studies, and microstructural studies have been performed on commercially available sheet and foil forms of alloy 347, alloys 625, HR230, HR120, and the new AL20-25+Nb. These studies have led to a mechanistic understanding of the responses of these alloys to anticipated service conditions, and suggest that these alloys developed for gas- and micro-turbine recuperator applications are also suitable for use in fuel cell heat-exchangers. Additional work is still required to achieve foil forms with creep life comparable to thicker-section wrought product forms of the same alloys.

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Shared Research Equipment Collaborative Research Center
Sponsoring Org.:
OE USDOE - Office of Electric Transmission and Distribution; USDOE Office of Science (SC)
OSTI Identifier:
932075
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: Materials Science & Technology'07, Detroit, MI, USA, 20070916, 20070920
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; ALLOYS; COGENERATION; CREEP; EFFICIENCY; FUEL CELLS; HEAT EXCHANGERS; MOLTEN CARBONATE FUEL CELLS; OXIDATION; PROCESSING; SOLID OXIDE FUEL CELLS; TESTING; heat exchangers; foil; creep resistance; austenitic alloys; HR230

Citation Formats

Evans, Neal D, Maziasz, Philip J, Shingledecker, John P, Pint, Bruce A, and Yamamoto, Yukinori. Candidate alloys for cost-effective, high-efficiency, high-temperature compact/foil heat-exchangers. United States: N. p., 2007. Web.
Evans, Neal D, Maziasz, Philip J, Shingledecker, John P, Pint, Bruce A, & Yamamoto, Yukinori. Candidate alloys for cost-effective, high-efficiency, high-temperature compact/foil heat-exchangers. United States.
Evans, Neal D, Maziasz, Philip J, Shingledecker, John P, Pint, Bruce A, and Yamamoto, Yukinori. Mon . "Candidate alloys for cost-effective, high-efficiency, high-temperature compact/foil heat-exchangers". United States. doi:.
@article{osti_932075,
title = {Candidate alloys for cost-effective, high-efficiency, high-temperature compact/foil heat-exchangers},
author = {Evans, Neal D and Maziasz, Philip J and Shingledecker, John P and Pint, Bruce A and Yamamoto, Yukinori},
abstractNote = {Solid oxide fuel cell (SOFC) and molten carbonate fuel cell (MCFC) systems operate at high temperatures (up to 1000 C and 650 C, respectively), which makes them especially attractive sources for combined heat and power (CHP) cogeneration. However, improvements in the efficiency of heat exchange in these fuel cells require both development and careful processing of advanced cost-effective alloys for use in such high-temperature service conditions. The high-temperature properties of both sheet and foil forms of several alloys being considered for use in compact heat-exchangers (recuperators) have been characterized. Mechanical and creep-rupture testing, oxidation studies, and microstructural studies have been performed on commercially available sheet and foil forms of alloy 347, alloys 625, HR230, HR120, and the new AL20-25+Nb. These studies have led to a mechanistic understanding of the responses of these alloys to anticipated service conditions, and suggest that these alloys developed for gas- and micro-turbine recuperator applications are also suitable for use in fuel cell heat-exchangers. Additional work is still required to achieve foil forms with creep life comparable to thicker-section wrought product forms of the same alloys.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
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