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Title: Thermal Stability of Silica for Application in Thermal Energy Storage

Abstract

Thermal energy storage (TES) systems have enabled concentrating solar power (CSP) to remain competitive in the modern energy mix by providing economical load shifting grid services and firming up intermittent solar resource. Free from siting constraints, TES also shows promise as an economical alternative to traditional pumped-storage hydropower (PSH) and compressed air energy storage (CAES). As potential thermal energy storage media, some solid particles demonstrate stability over wide temperature ranges which allows for increased sensible energy storage density and is essential in achieving low-cost storage. Silica sand, in the form of a-quartz, is one such candidate. This work presents a brief review of relevant silica thermophysical properties and further investigates the thermal stability of silica particles as a candidate TES media by subjecting them to two different thermal tests: (1) a 500-hour thermal treatment at 1200 degrees C under varied atmospheres; and (2) cycling 25, 50, and 100 times between 300 degrees C and 1200 degrees C. For both tests, particle stability is examined by means of pre- and post-treatment Mie scattering. An additional XRD analysis is conducted for the 500-hour treatment in air. Results indicate limited changes in both particle distribution and crystallographic structure which is promising for themore » application as solid particle media for thermal energy storage.« less

Authors:
ORCiD logo; ORCiD logo; ; ; ;
Publication Date:
Research Org.:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
OSTI Identifier:
1874009
Report Number(s):
NREL/CP-5700-83281
MainId:84054;UUID:a226c370-593e-4bd5-b4a2-1d4ced4d163e;MainAdminID:64752
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at SOLARPACES 2020: 26th International Conference on Concentrating Solar Power and Chemical Energy Systems, 28 September - 2 October 2020, Freiburg, Germany; Related Information: 77426
Country of Publication:
United States
Language:
English
Subject:
ENERGY STORAGE,SOLAR ENERGY; concentrating solar power; particle stability; quartz; sand; silica; solar; thermal energy storage

Citation Formats

Davenport, Patrick, Ma, Zhiwen, Nation, William, Schirck, Jason, Morris, Aaron, and Lambert, Matthew. Thermal Stability of Silica for Application in Thermal Energy Storage. United States: N. p., 2022. Web. doi:10.1063/5.0085641.
Davenport, Patrick, Ma, Zhiwen, Nation, William, Schirck, Jason, Morris, Aaron, & Lambert, Matthew. Thermal Stability of Silica for Application in Thermal Energy Storage. United States. https://doi.org/10.1063/5.0085641
Davenport, Patrick, Ma, Zhiwen, Nation, William, Schirck, Jason, Morris, Aaron, and Lambert, Matthew. 2022. "Thermal Stability of Silica for Application in Thermal Energy Storage". United States. https://doi.org/10.1063/5.0085641.
@article{osti_1874009,
title = {Thermal Stability of Silica for Application in Thermal Energy Storage},
author = {Davenport, Patrick and Ma, Zhiwen and Nation, William and Schirck, Jason and Morris, Aaron and Lambert, Matthew},
abstractNote = {Thermal energy storage (TES) systems have enabled concentrating solar power (CSP) to remain competitive in the modern energy mix by providing economical load shifting grid services and firming up intermittent solar resource. Free from siting constraints, TES also shows promise as an economical alternative to traditional pumped-storage hydropower (PSH) and compressed air energy storage (CAES). As potential thermal energy storage media, some solid particles demonstrate stability over wide temperature ranges which allows for increased sensible energy storage density and is essential in achieving low-cost storage. Silica sand, in the form of a-quartz, is one such candidate. This work presents a brief review of relevant silica thermophysical properties and further investigates the thermal stability of silica particles as a candidate TES media by subjecting them to two different thermal tests: (1) a 500-hour thermal treatment at 1200 degrees C under varied atmospheres; and (2) cycling 25, 50, and 100 times between 300 degrees C and 1200 degrees C. For both tests, particle stability is examined by means of pre- and post-treatment Mie scattering. An additional XRD analysis is conducted for the 500-hour treatment in air. Results indicate limited changes in both particle distribution and crystallographic structure which is promising for the application as solid particle media for thermal energy storage.},
doi = {10.1063/5.0085641},
url = {https://www.osti.gov/biblio/1874009}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2022},
month = {5}
}

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Works referenced in this record:

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