TY - GEN
T1 - Materials selection for high temperature (750°-1000°C) metallic recuperators for improved efficiency microturbines
AU - Pint, Bruce A.
AU - Swindeman, Robert W.
AU - More, Karren L.
AU - Tortorelli, Peter F.
PY - 2001
Y1 - 2001
N2 - The incorporation of a primary surface recuperator is one method for significantly improving the energy efficiency of a microturbine. The goal of this work is to employ laboratory testing of foil material ( ≈ 7 5-1 25mm or 3-5mil thickness) to select alloys for higher temperature (750°-1000°C, 1400-1800°F) recuperator performance based on creep strength and corrosion resistance. Alloys of interest are h i g h-C r, Ni-base superalloys such as alloy 625 and aluminumcontaining alloys such as Haynes alloy 214 and Plansee alloy PM2000, which is an oxide-dispersed FeCrAl. The interest in the latter two alloys is based on their corrosion resistance. Particularly in exhaust gas environments, chromia surface oxides are not sufficiently protective at high temperatures to achieve desired lifetimes. The formation of a slow-growing external alumina scale confers exceptional corrosion resistance for this application.
AB - The incorporation of a primary surface recuperator is one method for significantly improving the energy efficiency of a microturbine. The goal of this work is to employ laboratory testing of foil material ( ≈ 7 5-1 25mm or 3-5mil thickness) to select alloys for higher temperature (750°-1000°C, 1400-1800°F) recuperator performance based on creep strength and corrosion resistance. Alloys of interest are h i g h-C r, Ni-base superalloys such as alloy 625 and aluminumcontaining alloys such as Haynes alloy 214 and Plansee alloy PM2000, which is an oxide-dispersed FeCrAl. The interest in the latter two alloys is based on their corrosion resistance. Particularly in exhaust gas environments, chromia surface oxides are not sufficiently protective at high temperatures to achieve desired lifetimes. The formation of a slow-growing external alumina scale confers exceptional corrosion resistance for this application.
UR - http://www.scopus.com/inward/record.url?scp=84905722071&partnerID=8YFLogxK
U2 - 10.1115/2001-GT-0445
DO - 10.1115/2001-GT-0445
M3 - Conference contribution
AN - SCOPUS:84905722071
SN - 9780791878507
T3 - Proceedings of the ASME Turbo Expo
BT - Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME Turbo Expo 2001: Power for Land, Sea, and Air, GT 2001
Y2 - 4 June 2001 through 7 June 2001
ER -
