A two-step cycle was discussed for solar thermochemical energy storage based on aluminum-doped calcium manganite reduction/oxidation reactions for direct integration into Air Brayton cycles. The two steps encompassed 1) the storage of concentrated solar direct irradiation via the thermal reduction of aluminum-doped calcium manganite and 2) the delivery of heat to an Air-Brayton cycle via re-oxidation of oxygen-deficient aluminum-doped calcium manganite. The re-oxidized aluminum-doped calcium manganite was fed back to the first step to complete the cycle. A 5 kWth solar thermochemical reactor operating under vacuum was fabricated and tested to examine the first cycle reduction step. Reactor operating conditions and high-flux solar simulator control were tuned for continuous reactor operation with particle temperatures > 1073 K. Continuous operation was achieved using intermittent, dense granular flows. A maximum absorption efficiency of 64.7% was shown, accounting for both sensible and chemical heat storage.
Schrader, Andrew, et al. "Experimental demonstration of a 5 kW<sub>th</sub> granular-flow reactor for solar thermochemical energy storage with aluminum-doped calcium manganite particles." Applied Thermal Engineering, vol. 173, no. C, Mar. 2020. https://doi.org/10.1016/j.applthermaleng.2020.115257
Schrader, Andrew, Schieber, Garrett, Ambrosini, Andrea, & Loutzenhiser, Peter (2020). Experimental demonstration of a 5 kW<sub>th</sub> granular-flow reactor for solar thermochemical energy storage with aluminum-doped calcium manganite particles. Applied Thermal Engineering, 173(C). https://doi.org/10.1016/j.applthermaleng.2020.115257
Schrader, Andrew, Schieber, Garrett, Ambrosini, Andrea, et al., "Experimental demonstration of a 5 kW<sub>th</sub> granular-flow reactor for solar thermochemical energy storage with aluminum-doped calcium manganite particles," Applied Thermal Engineering 173, no. C (2020), https://doi.org/10.1016/j.applthermaleng.2020.115257
@article{osti_1607491,
author = {Schrader, Andrew and Schieber, Garrett and Ambrosini, Andrea and Loutzenhiser, Peter},
title = {Experimental demonstration of a 5 kW<sub>th</sub> granular-flow reactor for solar thermochemical energy storage with aluminum-doped calcium manganite particles},
annote = {A two-step cycle was discussed for solar thermochemical energy storage based on aluminum-doped calcium manganite reduction/oxidation reactions for direct integration into Air Brayton cycles. The two steps encompassed 1) the storage of concentrated solar direct irradiation via the thermal reduction of aluminum-doped calcium manganite and 2) the delivery of heat to an Air-Brayton cycle via re-oxidation of oxygen-deficient aluminum-doped calcium manganite. The re-oxidized aluminum-doped calcium manganite was fed back to the first step to complete the cycle. A 5 kWth solar thermochemical reactor operating under vacuum was fabricated and tested to examine the first cycle reduction step. Reactor operating conditions and high-flux solar simulator control were tuned for continuous reactor operation with particle temperatures > 1073 K. Continuous operation was achieved using intermittent, dense granular flows. A maximum absorption efficiency of 64.7% was shown, accounting for both sensible and chemical heat storage.},
doi = {10.1016/j.applthermaleng.2020.115257},
url = {https://www.osti.gov/biblio/1607491},
journal = {Applied Thermal Engineering},
issn = {ISSN 1359-4311},
number = {C},
volume = {173},
place = {United States},
publisher = {Elsevier},
year = {2020},
month = {03}}
Georgia Inst. of Technology, Atlanta, GA (United States); Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S); USDOE National Nuclear Security Administration (NNSA)
Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, Vol. 460, Issue 2052https://doi.org/10.1098/rspa.2004.1277
Gorman, Brandon T.; Johnson, Nathan G.; Miller, James E.
ASME 2015 9th International Conference on Energy Sustainability collocated with the ASME 2015 Power Conference, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum, Volume 1: Advances in Solar Buildings and Conservation; Climate Control and the Environment; Alternate Fuels and Infrastructure; ARPA-E; Combined Energy Cycles, CHP, CCHP, and Smart Grids; Concentrating Solar Power; Economic, Environmental, and Policy Aspects of Alternate Energy; Geothermal Energy, Harvesting, Ocean Energy and Other Emerging Technologies; Hydrogen Energy Technologies; Low/Zero Emission Power Plants and Carbon Sequestration; Micro and Nano Technology Applications and Materialshttps://doi.org/10.1115/ES2015-49810