Numerical analyses of high temperature dense, granular flows coupled to high temperature flow property measurements for solar thermal energy storage

Yarrington, Justin D.; Bagepalli, Malavika V.; Pathikonda, Gokul; Schrader, Andrew J.; Zhang, Zhuomin M.; Ranjan, Devesh; Loutzenhiser, Peter G.

doi:10.1016/j.solener.2020.10.085

Numerical analyses of high temperature dense, granular flows coupled to high temperature flow property measurements for solar thermal energy storage

Journal Article · Sat Dec 12 23:00:00 EST 2020 · Solar Energy

DOI:https://doi.org/10.1016/j.solener.2020.10.085· OSTI ID:1735692

Yarrington, Justin D. ^[1]; Bagepalli, Malavika V. ^[2]; Pathikonda, Gokul ^[2]; Schrader, Andrew J. ^[3]; Zhang, Zhuomin M. ^[2]; Ranjan, Devesh ^[2]; Loutzenhiser, Peter G. ^[2]

Georgia Inst. of Technology, Atlanta, GA (United States); Georgia Institute of Technology
Georgia Inst. of Technology, Atlanta, GA (United States)
Univ. of Dayton, OH (United States)

High temperature particle flow properties necessary to predict granular flow behavior for solar thermal energy storage applications were measured and calculated for Carbobead CP 30/60 up to 800 °C. Here, the measured properties included elastic and shear moduli, particle-particle coefficients of static sliding and rolling friction, and particle-particle coefficients of restitution. Poisson’s ratio was calculated with elastic and shear moduli. The flow properties were used as inputs for a numerical model using the discrete element method to examine granular flows along an inclined plane at high temperature. The flow behavior was strongly influenced by the coefficients of static friction, which impacted the particle residence time, shear effects from the side walls, and particle flow mass flux. An 8.7%, 15.6%, and 8.5% increase and 37.9% decrease in steady state mass flow rate was observed for 200 °C, 400 °C, 600 °C, and 800 °C, respectively, when compared to room temperature simulations. A 52%, 59%, and 33% decrease in the time to reach steady state was observed for 200 °C, 400 °C, and 600 °C, respectively, while a 53% increase in time was observed for 800 °C. A significant delay in the flow development at 800 °C was observed due to significantly higher frictional forces.

View Accepted Manuscript (DOE)

Research Organization:: Georgia Inst. of Technology, Atlanta, GA (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office

Grant/Contract Number:: EE0008372

OSTI ID:: 1735692

Alternate ID(s):: OSTI ID: 1809448

Journal Information:: Solar Energy, Journal Name: Solar Energy Vol. 213; ISSN 0038-092X

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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14 SOLAR ENERGY
Discrete element method
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Numerical analyses of high temperature dense, granular flows coupled to high temperature flow property measurements for solar thermal energy storage

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