Energy-saving retrofit technologies and application analysis for rotary dehumidifiers in lithium battery manufacturing processes

In the lithium battery manufacturing process,the energy consumption of the air conditioning system centered on the rotary dehumidifiers accounts for over 30% of the total production energy consumption,and energy-saving retrofitting is of great significance for reducing operational costs.This paper proposes an energy-saving design approach by optimizing the layout of air conditioning unit components and methods of energy reuse,integrating a direct expansion heat pump system to partially replace traditional cold and heat sources,and adjusting the configuration ratio of cold and heat sources.Actual annual operational data from the battery cell factory project shows that the operational costs of the retrofitted system can be reduced by more than 40% compared with those of a conventional system.