Lifetime modeling for a supercritical CO2-molten salt CSP power block

Bruce A. Pint; Stephen S. Raiman; James R. Keiser

doi:10.1063/1.5117668

Lifetime modeling for a supercritical CO₂-molten salt CSP power block

Bruce A. Pint, Stephen S. Raiman, James R. Keiser

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

4 Scopus citations

Abstract

To achieve higher efficiency in the next generation of concentrating solar power (CSP) plants, higher temperatures are needed, which will challenge the materials. One scenario would include molten chloride salts for thermal storage and supercritical CO₂ (sCO₂) for the power block and operating temperatures above 700°C to achieve at least 50% efficiency. For the high pressure (20-30MPa) sCO₂ conditions, high strength Ni-based alloys will be required above 700°C and an extensive experimental project has confirmed good sCO₂ compatibility for alloys 625, 740H and 282. The data set generated enables more accurate lifetime predictions for 30-year service. Compatibility testing with K-Mg-Na chloride salts has just begun. Initial isothermal capsule results indicate there are promising combinations of salt chemistry, temperature and alloy composition. However, flowing salt testing is needed to evaluate compatibility, which is in progress.

Original language	English
Title of host publication	SolarPACES 2018
Subtitle of host publication	International Conference on Concentrating Solar Power and Chemical Energy Systems
Editors	Christoph Richter
Publisher	American Institute of Physics Inc.
ISBN (Electronic)	9780735418660
DOIs	https://doi.org/10.1063/1.5117668
State	Published - Jul 25 2019
Event	24th SolarPACES International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2018 - Casablanca, Morocco Duration: Oct 2 2018 → Oct 5 2018

Publication series

Name	AIP Conference Proceedings
Volume	2126
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	24th SolarPACES International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2018
Country/Territory	Morocco
City	Casablanca
Period	10/2/18 → 10/5/18

Funding

The authors would like to thank M. Howell, A. Willoughby, M. Stephens, G. Garner, T. Lowe, T. Jordan, H. Meyer, D. Leonard, M. Lance, R. Mayes and J. Kurley at ORNL and S. Pearson from Akron U. for assistance with the experimental work and the other members of our research team: Brayton Energy, LLC, Special Metals, Haynes International and Sandvik and the input of others from the CSP/sCO2 industry. This research was funded by the SunShot Initiative under the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy, Solar Energy Technology Program: SuNLaMP award number DE-EE0001556 and CSP award number 33873 The authors would like to thank M. Howell, A. Willoughby, M. Stephens, G. Garner, T. Lowe, T. Jordan, H. Meyer, D. Leonard, M. Lance, R. Mayes and J. Kurley at ORNL and S. Pearson from Akron U. for assistance with the experimental work and the other members of our research team: Brayton Energy, LLC, Special Metals, Haynes International and Sandvik and the input of others from the CSP/sCO2 industry. This research was funded by the SunShot Initiative under the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy, Solar Energy Technology Program: SuNLaMP award number DE-EE0001556 and CSP award number 33873.

Access to Document

10.1063/1.5117668

Cite this

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title = "Lifetime modeling for a supercritical CO2-molten salt CSP power block",

abstract = "To achieve higher efficiency in the next generation of concentrating solar power (CSP) plants, higher temperatures are needed, which will challenge the materials. One scenario would include molten chloride salts for thermal storage and supercritical CO2 (sCO2) for the power block and operating temperatures above 700°C to achieve at least 50\% efficiency. For the high pressure (20-30MPa) sCO2 conditions, high strength Ni-based alloys will be required above 700°C and an extensive experimental project has confirmed good sCO2 compatibility for alloys 625, 740H and 282. The data set generated enables more accurate lifetime predictions for 30-year service. Compatibility testing with K-Mg-Na chloride salts has just begun. Initial isothermal capsule results indicate there are promising combinations of salt chemistry, temperature and alloy composition. However, flowing salt testing is needed to evaluate compatibility, which is in progress.",

author = "Pint, \{Bruce A.\} and Raiman, \{Stephen S.\} and Keiser, \{James R.\}",

note = "Publisher Copyright: {\textcopyright} 2019 Author(s).; 24th SolarPACES International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2018 ; Conference date: 02-10-2018 Through 05-10-2018",

year = "2019",

month = jul,

day = "25",

doi = "10.1063/1.5117668",

language = "English",

series = "AIP Conference Proceedings",

publisher = "American Institute of Physics Inc.",

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Pint, BA, Raiman, SS & Keiser, JR 2019, Lifetime modeling for a supercritical CO₂-molten salt CSP power block. in C Richter (ed.), SolarPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems., 160005, AIP Conference Proceedings, vol. 2126, American Institute of Physics Inc., 24th SolarPACES International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2018, Casablanca, Morocco, 10/2/18. https://doi.org/10.1063/1.5117668

Lifetime modeling for a supercritical CO₂-molten salt CSP power block. / Pint, Bruce A.; Raiman, Stephen S.; Keiser, James R.
SolarPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems. ed. / Christoph Richter. American Institute of Physics Inc., 2019. 160005 (AIP Conference Proceedings; Vol. 2126).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AB - To achieve higher efficiency in the next generation of concentrating solar power (CSP) plants, higher temperatures are needed, which will challenge the materials. One scenario would include molten chloride salts for thermal storage and supercritical CO2 (sCO2) for the power block and operating temperatures above 700°C to achieve at least 50% efficiency. For the high pressure (20-30MPa) sCO2 conditions, high strength Ni-based alloys will be required above 700°C and an extensive experimental project has confirmed good sCO2 compatibility for alloys 625, 740H and 282. The data set generated enables more accurate lifetime predictions for 30-year service. Compatibility testing with K-Mg-Na chloride salts has just begun. Initial isothermal capsule results indicate there are promising combinations of salt chemistry, temperature and alloy composition. However, flowing salt testing is needed to evaluate compatibility, which is in progress.

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