Thermally driven convection in Li ∥ Bi liquid metal batteries

JOURNAL OF POWER SOURCES

卷:401

Article

Personnettaz, Paolo^1,2  Beckstein, Pascal¹  Landgraf, Steffen¹  Koellner, Thomas^1,3  Nimtz, Michael¹  Weber, Norbert¹  Weier, Tom¹ 

[1] Helmholtz Zentrum Dresden Rossendorf, Bautzner Landstr 400, D-01328 Dresden, Germany

[2] Politecn Torino, Corso Duca Abruzzi 24, I-10129 Turin, Italy

[3] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA

关键词: Liquid metal batteries;    Heat transfer;    Thermal convection;    Thermodynamics;    OpenFOAM;    Volume of fluid;    Spurious currents;   

DOI  :  10.1016/j.jpowsour.2018.08.069

来源: Elsevier

【 摘 要 】

Liquid Metal Batteries (LMBs) are a promising concept for cheap electrical energy storage at grid level. These are built as a stable density stratification of three liquid layers, with two liquid metals separated by a molten salt. In order to ensure a safe and efficient operation, the understanding of transport phenomena in LMBs is essential. With this motivation we study thermal convection induced by internal heat generation. We consider the electrochemical nature of the cell in order to define the heat balance and the operating parameters. Moreover we develop a simple 1D heat conduction model as well as a fully 3D thermo-fluid dynamics model. The latter is implemented in the CFD library OpenFOAM, extending the volume of fluid solver, and validated against a pseudo-spectral code. Both models are used to study a rectangular 10x10 cm(2) Li parallel to Bi LMB cell at three different states of charge.

【 授权许可】

Free