Validation of lifetime models for recuperator foils through long-term laboratory and engine testing

Sebastien Dryepondt, Bruce A. Pint

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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 languageEnglish
Title of host publicationMicroturbines, Turbochargers, and Small Turbomachines; Steam Turbines
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791858714
DOIs
StatePublished - 2019
EventASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition, GT 2019 - Phoenix, United States
Duration: Jun 17 2019Jun 21 2019

Publication series

NameProceedings of the ASME Turbo Expo
Volume8

Conference

ConferenceASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition, GT 2019
Country/TerritoryUnited States
CityPhoenix
Period06/17/1906/21/19

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).

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