Abstract
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.
Original language | English |
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Title of host publication | Microturbines, Turbochargers, and Small Turbomachines; Steam Turbines |
Publisher | American Society of Mechanical Engineers (ASME) |
ISBN (Electronic) | 9780791858714 |
DOIs | |
State | Published - 2019 |
Event | ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition, GT 2019 - Phoenix, United States Duration: Jun 17 2019 → Jun 21 2019 |
Publication series
Name | Proceedings of the ASME Turbo Expo |
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Volume | 8 |
Conference
Conference | ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition, GT 2019 |
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Country/Territory | United States |
City | Phoenix |
Period | 06/17/19 → 06/21/19 |
Funding
The author would like to thank A. Willoughby, M. Stephens, J. Moser, T. Lowe and T. Jordan at ORNL for assistance with the experimental work. They also would like to acknowledge R. Pillai and M. Romedenne for reviewing the manuscript. Capstone Turbine Corp. fabricated the rainbow recuperator (D. Vicario, R. Taylor) and disassembled the core after exposure (D. Ayers). Solar Turbines, Inc. performed the long-term exposures and the specimens were provided by R. Klug for analysis. This research was sponsored by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office (Combined Heat and Power). This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).