IoT-Based Monitoring of Evaporator Icing and Electrical Current in Precision Air Conditioning
Keywords:
internet of things, precision air conditioning, evaporator temperature monitoring, electrical current monitoring, preventive maintenanceAbstract
Precision Air Conditioning (PAC) systems play a critical role in maintaining thermal stability in telecommunication data centers that operate continuously. One common operational issue in PAC systems is evaporator icing, which can degrade heat transfer performance and compromise system reliability, while electrical current instability may indicate abnormal compressor operation. This study proposes an Internet of Things (IoT)-based monitoring system for real-time observation of evaporator temperature and electrical current as an early detection mechanism for potential faults in precision air conditioning systems. The system was developed using an ESP8266 microcontroller, a DS18B20 temperature sensor, and a PZEM-004T current sensor, with Telegram employed as a remote monitoring interface. Experimental testing was conducted on a precision air conditioning unit under normal operating conditions. The results demonstrate that the DS18B20 sensor provides accurate and consistent temperature measurements, with evaporator temperatures recorded within the normal operating range. Electrical current measurements obtained from the PZEM-004T sensor show close agreement with reference multimeter readings, indicating reliable current monitoring performance. The developed system successfully transmits temperature and current data in real time with stable communication performance. By integrating thermal and electrical parameters within a single IoT-based monitoring framework, the proposed system supports early fault detection and preventive maintenance in PAC systems. This approach enhances operational reliability and provides a practical, low-cost monitoring solution for telecommunication data center cooling applications.
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