Current-driven flow instabilities in large-scale liquid metal batteries, and how to tame them

JOURNAL OF POWER SOURCES

卷:265

Article

Weber, Norbert¹  Galindo, Vladimir¹  Stefani, Frank¹  Weier, Tom¹ 

[1] Helmholtz Zentrum Dresden Rossendolf, D-01328 Dresden, Germany

关键词: Liquid metal batteries;    Magnetohydrodynamics;    Flow instabilities;    Tayler instability;   

DOI  :  10.1016/j.jpowsour.2014.03.055

来源: Elsevier

【 摘 要 】

The use of liquid metal batteries is considered as one promising option for electric grid stabilization. While large versions of such batteries are preferred in view of the economies of scale, they are susceptible to various magnetohydrodynamic instabilities which imply a risk of short-circuiting the battery due to the triggered fluid flow. Here we focus on the current driven Tayler instability and give critical electrical currents for its onset as well as numerical estimates for the appearing flow structures and speeds. Scaling laws for different materials, battery sizes and geometries are found. We further discuss and compare various means for preventing the instability. (c) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

Free