Modeling of a thermal energy storage system based on coupled metal hydrides (magnesium iron – sodium alanate) for concentrating solar power plants
Abstract
Concentrating solar power plants represent low cost and efficient solutions for renewable electricity production only if adequate thermal energy storage systems are included. Metal hydride thermal energy storage systems have demonstrated the potential to achieve very high volumetric energy densities, high exergetic efficiencies, and low costs. The current work analyzes the technical feasibility and the performance of a storage system based on the high temperature Mg2FeH6 hydride coupled with the low temperature Na3AlH6 hydride. To accomplish this, a detailed transport model has been set up and the coupled metal hydride system has been simulated based on a laboratory scale experimental configuration. Proper kinetics expressions have been developed and included in the model to replicate the absorption and desorption process in the high temperature and low temperature hydride materials. The system showed adequate hydrogen transfer between the two metal hydrides, with almost complete charging and discharging, during both thermal energy storage and thermal energy release. The system operating temperatures varied from 450°C to 500°C, with hydrogen pressures between 30 bar and 70 bar. This makes the thermal energy storage system a suitable candidate for pairing with a solar driven steam power plant. The model results, obtained for the selected experimental configuration,more »
- Authors:
-
- Savannah River Site (SRS), Aiken, SC (United States)
- Savannah River Site (SRS), Aiken, SC (United States); Greenway Energy LLC, Aiken, SC (United States)
- Publication Date:
- Research Org.:
- Savannah River Site (SRS), Aiken, SC (United States)
- Sponsoring Org.:
- USDOE Office of Environmental Management (EM); USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1426657
- Alternate Identifier(s):
- OSTI ID: 1550036
- Report Number(s):
- SRNL-STI-2018-00039
Journal ID: ISSN 0360-3199; PII: S036031991731683X; TRN: US1802841
- Grant/Contract Number:
- DE-AC09-08SR22470
- Resource Type:
- Accepted Manuscript
- Journal Name:
- International Journal of Hydrogen Energy
- Additional Journal Information:
- Journal Volume: 42; Journal Issue: 35; Journal ID: ISSN 0360-3199
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; 25 ENERGY STORAGE; 29 ENERGY PLANNING, POLICY, AND ECONOMY; Metal hydrides; Concentrating solar power plants; Thermal energy storage; Transport models; Efficiency
Citation Formats
d'Entremont, A., Corgnale, C., Sulic, M., Hardy, B., Zidan, R., and Motyka, T. Modeling of a thermal energy storage system based on coupled metal hydrides (magnesium iron – sodium alanate) for concentrating solar power plants. United States: N. p., 2017.
Web. doi:10.1016/j.ijhydene.2017.04.231.
d'Entremont, A., Corgnale, C., Sulic, M., Hardy, B., Zidan, R., & Motyka, T. Modeling of a thermal energy storage system based on coupled metal hydrides (magnesium iron – sodium alanate) for concentrating solar power plants. United States. https://doi.org/10.1016/j.ijhydene.2017.04.231
d'Entremont, A., Corgnale, C., Sulic, M., Hardy, B., Zidan, R., and Motyka, T. Thu .
"Modeling of a thermal energy storage system based on coupled metal hydrides (magnesium iron – sodium alanate) for concentrating solar power plants". United States. https://doi.org/10.1016/j.ijhydene.2017.04.231. https://www.osti.gov/servlets/purl/1426657.
@article{osti_1426657,
title = {Modeling of a thermal energy storage system based on coupled metal hydrides (magnesium iron – sodium alanate) for concentrating solar power plants},
author = {d'Entremont, A. and Corgnale, C. and Sulic, M. and Hardy, B. and Zidan, R. and Motyka, T.},
abstractNote = {Concentrating solar power plants represent low cost and efficient solutions for renewable electricity production only if adequate thermal energy storage systems are included. Metal hydride thermal energy storage systems have demonstrated the potential to achieve very high volumetric energy densities, high exergetic efficiencies, and low costs. The current work analyzes the technical feasibility and the performance of a storage system based on the high temperature Mg2FeH6 hydride coupled with the low temperature Na3AlH6 hydride. To accomplish this, a detailed transport model has been set up and the coupled metal hydride system has been simulated based on a laboratory scale experimental configuration. Proper kinetics expressions have been developed and included in the model to replicate the absorption and desorption process in the high temperature and low temperature hydride materials. The system showed adequate hydrogen transfer between the two metal hydrides, with almost complete charging and discharging, during both thermal energy storage and thermal energy release. The system operating temperatures varied from 450°C to 500°C, with hydrogen pressures between 30 bar and 70 bar. This makes the thermal energy storage system a suitable candidate for pairing with a solar driven steam power plant. The model results, obtained for the selected experimental configuration, showed an actual thermal energy storage system volumetric energy density of about 132 kWh/m3, which is more than 5 times the U.S. Department of Energy SunShot target (25 kWh/m3).},
doi = {10.1016/j.ijhydene.2017.04.231},
journal = {International Journal of Hydrogen Energy},
number = 35,
volume = 42,
place = {United States},
year = {Thu Aug 31 00:00:00 EDT 2017},
month = {Thu Aug 31 00:00:00 EDT 2017}
}
Web of Science
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Works referencing / citing this record:
Extremely Pure Mg2FeH6 as a Negative Electrode for Lithium Batteries
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