Validation of Lifetime Models for Recuperator Foils Through Long-Term Laboratory and Engine Testing

Conference · Sat Jun 01 04:00:00 EDT 2019

DOI:https://doi.org/10.1115/GT2019-90927· OSTI ID:1817614

Dryepondt, Sebastien ^[1]; Pint, Bruce ^[1]

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1. ORNL

For the next-generation of turbine-based combined heat & power (CHP) systems, materials development can enable lower costs and higher efficiency, particularly for alloy foils used in the recuperator. To quantify the potential benefits, lifetime models are being developed for current chromia-forming alloys such as 625, 120, 310 and 709 (also called 2025Nb) as well as new alumina-forming austenitic (AFA) steels, which are much more oxidation resistant in exhaust gas. A combination of long-term laboratory (up to 30 kh) and field exposure data (up to 100 kh) are being used to develop and validate the model for operation at 650°–800°C.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1817614
• Country of Publication: United States
• Language: English