TY - GEN
T1 - Evaluation of NiCrAl foil for a concentrated solar power application
AU - Pint, Bruce A.
AU - Anderson, Bruce N.
AU - Matthews, Wendy J.
AU - Waldhelm, Chris M.
AU - Treece, William
PY - 2013
Y1 - 2013
N2 - A NiCrA1-type foil (alloy 214) was selected for evaluation for heat exchanger applications for a concentrated solar power (CSP) system. Due to the formation of a protective alumina surface oxide, this class of alloys can operate at higher temperatures than conventional stainless steels or even Ni-base alloys, such as alloy 625. Laboratory testing is being conducted at 1000° and 1050°C in dry air using 10 h thermal cycles in order to simulate the CSP duty cycle at a high temperature to accelerate the degradation process. Mass change data showed indications of degradation of the foils with exposures up to 8,000 h. Foil specimens also were stopped after 2,400 h to measure the loss of A1 in the foil as a method to predict lifetime. Previous lifetime modeling results for 1h cycles in air with 10%H2O provided an initial basis to predict lifetime for this material to > 100,000 h operating times as a function of foil thickness and exposure temperature for this application.
AB - A NiCrA1-type foil (alloy 214) was selected for evaluation for heat exchanger applications for a concentrated solar power (CSP) system. Due to the formation of a protective alumina surface oxide, this class of alloys can operate at higher temperatures than conventional stainless steels or even Ni-base alloys, such as alloy 625. Laboratory testing is being conducted at 1000° and 1050°C in dry air using 10 h thermal cycles in order to simulate the CSP duty cycle at a high temperature to accelerate the degradation process. Mass change data showed indications of degradation of the foils with exposures up to 8,000 h. Foil specimens also were stopped after 2,400 h to measure the loss of A1 in the foil as a method to predict lifetime. Previous lifetime modeling results for 1h cycles in air with 10%H2O provided an initial basis to predict lifetime for this material to > 100,000 h operating times as a function of foil thickness and exposure temperature for this application.
UR - http://www.scopus.com/inward/record.url?scp=84890226796&partnerID=8YFLogxK
U2 - 10.1115/GT2013-94939
DO - 10.1115/GT2013-94939
M3 - Conference contribution
AN - SCOPUS:84890226796
SN - 9780791855188
T3 - Proceedings of the ASME Turbo Expo
BT - ASME Turbo Expo 2013
T2 - ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013
Y2 - 3 June 2013 through 7 June 2013
ER -
