Numerical Analysis of Moisture Ventilation in a Lithium Ion Battery manufacturing Dry Room

Abstract

In this paper, the characteristics of moisture ventilation in a lithium ion battery manufacturing dry room are studied numerically using the standard k–ϵ turbulence model. Both the steady-state and the unsteady behavior of moisture ventilation are analyzed by considering two different cases; i.e., local moisture generation and uniformly distributed moisture generation in the room. In order to evaluate the characteristics of moisture ventilation, three scales of ventilation efficiency and characteristic ventilation time are presented from the numerical results. It is shown that moisture distribution is dependent strongly on the flow field. The characteristics of moisture ventilation are improved by 20% and 40% in terms of the 1st scale of ventilation efficiency (SVE1) and the 2nd scale of ventilation efficiency (SVE2), respectively, through the modifications of design variables such as the addition of inlets, outlets and partition. A significant improvement in the characteristic ventilation time and the moisture exhaust efficiency is also achieved by these modifications.