Experimental demonstration of a 5 kWth granular-flow reactor for solar thermochemical energy storage with aluminum-doped calcium manganite particles
Journal Article
·
· Applied Thermal Engineering
- Georgia Inst. of Technology, Atlanta, GA (United States); Georgia Institute of Technology
- Georgia Inst. of Technology, Atlanta, GA (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
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.
- Research Organization:
- Georgia Inst. of Technology, Atlanta, GA (United States); Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Program (EE-2A)
- Grant/Contract Number:
- AC04-94AL85000; EE0000805; NA0003525
- OSTI ID:
- 1607491
- Alternate ID(s):
- OSTI ID: 1614779
OSTI ID: 1780413
- Report Number(s):
- SAND--2020-3882J
- Journal Information:
- Applied Thermal Engineering, Journal Name: Applied Thermal Engineering Journal Issue: C Vol. 173; ISSN 1359-4311
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Recent Advances in Thermochemical Energy Storage via Solid–Gas Reversible Reactions at High Temperature
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journal | November 2020 |
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