U.S. Department of Energy Office of Scientific and Technical Information
Aluminum-doped calcium manganite particles for solar thermochemical energy storage: Reactor design, particle characterization, and heat and mass transfer modeling
Journal Article·· International Journal of Heat and Mass Transfer
A two-step cycle is discussed for solar thermochemical energy storage based on particulate aluminum-doped calcium manganite reduction/oxidation reactions for direct integration into Air Brayton cycles. The two steps encompass 1) the storage of concentrated solar irradiation within endothermic reduction of aluminum-doped calcium manganite and 2) the delivery of heat to an Air-Brayton cycle via exothermic re-oxidation of oxygen-deficient aluminum-doped calcium magnanite. A 5 kWth scale solar thermochemical reactor operating under vacuum was designed, modeled, and optimized to thermally reduce a continuous, gravity-driven flow of aluminum-doped calcium manganite particles. The granular flows were characterized in a tilt-flow rig, and particle image velocimetry was used to determine flow properties via frictional and velocity scaling relationships. Flow properties were integrated into a detailed heat and mass transfer model of the solar thermochemical reactor. A reactor design with 31° inclination angle, 230 g/min of particles, and 5.2 kWth radiative input from the high-flux solar simulator was discovered to produce an outlet flow temperature of 1158 K, with stoichiometric deviations of 0.076 and a storage efficiency of 0.628 while avoiding particle overheating and promoting longer particle residence times.
Schrader, Andrew J., et al. "Aluminum-doped calcium manganite particles for solar thermochemical energy storage: Reactor design, particle characterization, and heat and mass transfer modeling." International Journal of Heat and Mass Transfer, vol. 152, no. C, Feb. 2020. https://doi.org/10.1016/j.ijheatmasstransfer.2020.119461
Schrader, Andrew J., Bush, H. Evan, Ranjan, Devesh, & Loutzenhiser, Peter G. (2020). Aluminum-doped calcium manganite particles for solar thermochemical energy storage: Reactor design, particle characterization, and heat and mass transfer modeling. International Journal of Heat and Mass Transfer, 152(C). https://doi.org/10.1016/j.ijheatmasstransfer.2020.119461
Schrader, Andrew J., Bush, H. Evan, Ranjan, Devesh, et al., "Aluminum-doped calcium manganite particles for solar thermochemical energy storage: Reactor design, particle characterization, and heat and mass transfer modeling," International Journal of Heat and Mass Transfer 152, no. C (2020), https://doi.org/10.1016/j.ijheatmasstransfer.2020.119461
@article{osti_1600515,
author = {Schrader, Andrew J. and Bush, H. Evan and Ranjan, Devesh and Loutzenhiser, Peter G.},
title = {Aluminum-doped calcium manganite particles for solar thermochemical energy storage: Reactor design, particle characterization, and heat and mass transfer modeling},
annote = {A two-step cycle is discussed for solar thermochemical energy storage based on particulate aluminum-doped calcium manganite reduction/oxidation reactions for direct integration into Air Brayton cycles. The two steps encompass 1) the storage of concentrated solar irradiation within endothermic reduction of aluminum-doped calcium manganite and 2) the delivery of heat to an Air-Brayton cycle via exothermic re-oxidation of oxygen-deficient aluminum-doped calcium magnanite. A 5 kWth scale solar thermochemical reactor operating under vacuum was designed, modeled, and optimized to thermally reduce a continuous, gravity-driven flow of aluminum-doped calcium manganite particles. The granular flows were characterized in a tilt-flow rig, and particle image velocimetry was used to determine flow properties via frictional and velocity scaling relationships. Flow properties were integrated into a detailed heat and mass transfer model of the solar thermochemical reactor. A reactor design with 31° inclination angle, 230 g/min of particles, and 5.2 kWth radiative input from the high-flux solar simulator was discovered to produce an outlet flow temperature of 1158 K, with stoichiometric deviations of 0.076 and a storage efficiency of 0.628 while avoiding particle overheating and promoting longer particle residence times.},
doi = {10.1016/j.ijheatmasstransfer.2020.119461},
url = {https://www.osti.gov/biblio/1600515},
journal = {International Journal of Heat and Mass Transfer},
issn = {ISSN 0017-9310},
number = {C},
volume = {152},
place = {United States},
publisher = {Elsevier},
year = {2020},
month = {02}}
Georgia Inst. of Technology, Atlanta, GA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
Grant/Contract Number:
EE0000805
OSTI ID:
1600515
Alternate ID(s):
OSTI ID: 1599647
Journal Information:
International Journal of Heat and Mass Transfer, Journal Name: International Journal of Heat and Mass Transfer Journal Issue: C Vol. 152; ISSN 0017-9310
Ho, Clifford K.; Christian, Joshua M.; Yellowhair, Julius
SOLARPACES 2015: International Conference on Concentrating Solar Power and Chemical Energy Systems, AIP Conference Proceedingshttps://doi.org/10.1063/1.4949074
Babiniec, Sean M.; Coker, Eric N.; Ambrosini, Andrea
SOLARPACES 2015: International Conference on Concentrating Solar Power and Chemical Energy Systems, AIP Conference Proceedingshttps://doi.org/10.1063/1.4949104