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High-temperature molten salt thermal energy storage systems for solar applicationsExperimental results of compatibility screening studies of 100 salt/containment/thermal conductivity enhancement (TCE) combinations for the high temperature solar thermal application range of 704 deg to 871 C (1300 to 1600 F) are presented. Nine candidate containment/HX alloy materials and two TCE materials were tested with six candidate solar thermal alkali and alkaline earth carbonate storage salts (both reagent and technical grade of each). Compatibility tests were conducted with salt encapsulated in approx. 6.0 inch x 1 inch welded containers of test material from 300 to 3000 hours. Compatibility evaluations were end application oriented, considering the potential 30 year lifetime requirement of solar thermal power plant components. Analyses were based on depth and nature of salt side corrosion of materials, containment alloy thermal aging effects, weld integrity in salt environment, air side containment oxidation, and chemical and physical analyses of the salt. A need for more reliable, and in some cases first time determined thermophysical and transport property data was also identified for molten carbonates in the 704 to 871 C temperature range. In particular, accurate melting point (mp) measurements were performed for Li2CO3 and Na2CO3 while melting point, heat of fusion, and specific heat determinations were conducted on 81.3 weight percent Na2CO3-18.7 weight percent K2CO3 and 52.2 weight percent BaCO3-47.8 weight percent Na2CO3 to support future TES system design and ultimate scale up of solar thermal energy storage (TES) subsystems.
Document ID
19840007611
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Petri, R. J.
(Institute of Gas Technology Chicago, IL, United States)
Claar, T. D.
(Institute of Gas Technology Chicago, IL, United States)
Ong, E.
(Institute of Gas Technology Chicago, IL, United States)
Date Acquired
September 4, 2013
Publication Date
July 1, 1983
Subject Category
Energy Production And Conversion
Report/Patent Number
NAS 1.26:167916
DOE/NASA/0156-83/1
NASA-CR-167916
Accession Number
84N15679
Funding Number(s)
CONTRACT_GRANT: DEN3-156
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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