Discrete Element Modeling of a Particle Heater for Energy Storage Systems

Schirck, Jason; Ma, Zhiwen; Morris, Aaron

doi:10.1016/j.powtec.2022.118084

Discrete Element Modeling of a Particle Heater for Energy Storage Systems

Journal Article · 12 November 2022 · Powder Technology

DOI:https://doi.org/10.1016/j.powtec.2022.118084· OSTI ID:1905804

Schirck, Jason; ; Morris, Aaron

A heater where particles fall under gravity and flow over a series of hot angled surfaces is simulated. The conductive, convective, and interphase heat transfer are simulated for all particles via discrete element modeling (DEM). The heater inclination angle, particle-particle and particle-wall friction coefficients, and thermal contact resistances are parametrically varied. Decreasing the inclination angle increases the residence time and overall heat transfer coefficient. Low values of the friction coefficients slow the particles and increase heating, but moderate to high values of friction dilute the flow and decrease the heat transfer. The contact resistance between particles is difficult to accurately characterize, so a wide range is studied. The contact resistance is altered by varying the particle roughness from 27.5 nm to 1 um, which reduces the overall heat transfer coefficient by 25%. A reduced order model is developed and validated to extrapolate the small-scale DEM results to a larger-scale system.

Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Advanced Research Projects Agency - Energy (ARPA-E)

DOE Contract Number:: AC36-08GO28308

OSTI ID:: 1905804

Report Number(s):: NREL/JA-5700-84816; MainId:85589; UUID:d2ded2a4-aa8b-4eb9-a5e4-9784abbd124d; MainAdminID:68275

Journal Information:: Powder Technology, Journal Name: Powder Technology Vol. 414

Country of Publication:: United States

Language:: English

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Related Subjects

ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
discrete element modeling
heat transfer
particles
thermal energy storage

Discrete Element Modeling of a Particle Heater for Energy Storage Systems

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