Journal of Electrical Engineering and Automation

As the intelligent transformation of the manufacturing industry is about to advance in depth, enhancing production efficiency and energy utilization efficiency has become pivotal for the intelligentization of factory environmental control systems. Addressing the current issues of high energy consumption and relatively inadequate precision in regional temperature and humidity control in factory central air conditioning systems, this paper executes a design scheme for an intelligent air conditioning system based on Programmable Logic Controller (PLC). The primary objective is to regulate environmental parameters such as temperature and humidity in different zones. Through simulation and emulation using MCGS configuration software, the system aims to achieve energy conservation and optimize the factory production environment. The system selects Siemens S7-1200 PLC as the main controller. Digital temperature and humidity sensors are placed in different zones to collect environmental temperature data. Independent regulation of each zone is achieved through methods such as PID algorithm and variable frequency speed control. In terms of hardware design, comprehensive selections are made regarding sensor models, motor models, and expansion modules. Multiple tasks are realized through a modular approach. By carefully selecting and configuring hardware equipment and writing control programs, the control logic for zone-specific regulation is validated through simulation runs. The improvement in actual operational energy savings of the intelligent air conditioning system demonstrates the theoretical effectiveness in complex environments, jointly proving the system's validity.

Intelligent air conditioning; PLC; Factory environment; Energy-saving efficiency