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ISSN Online: 2162-6561
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CHARACTERISTICS OF NUCLEATE BOILING IN TALL ENCLOSURES: INFLUENCE OF THE ASPECT RATIO − FOR APPLICATIONS IN HIGH-PERFORMANCE LEAD-ACID BATTERIES
ABSTRAKT
The thermal management of batteries is a most important point to increase the efficiency of battery systems which are applicable in different devices. The present investigation focuses on high-performance lead-acid batteries with high discharge rate which produces pronounced heat flux by chemical reactions between the electrodes and electrolyte. The produced heat energy is transferred to the electrolyte from the electrodes. As a result of the high heat flux, nucleate boiling can be observed on the surfaces of the electrodes. In this context, the boiling phenomenon is simulated using the VOF model. The characteristics of the formed vapor bubbles, heat transfer parameter, and fluid flow under the influence of different aspect ratios of the enclosures are investigated comprehensively. In this research, we are going to find the optimal aspect ratio to prevent the creation of a thermal insulation area in the constant heat flux between the walls by merging vapor bubbles.
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