Real-time thermodynamic monitoring of split inverter ACs: amicrocontroller-driven investigation of performance

Negara, I Gede Artha and Winarta, Adi and Sunu, Putu Wijaya and Santosa, I Dewa Made Cipta and Suamir, I Nyoman and Wirajati, I Gusti Agung Bagus and Putra, I Dewa Gede Agus Tri (2024) Real-time thermodynamic monitoring of split inverter ACs: amicrocontroller-driven investigation of performance. Jurnal Polimesin, 22 (2). pp. 199-205. ISSN 2549-1999

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Abstract

Recent technological advancements, particularly in air conditioning cooling systems, have led to rapid developments such as inverter technology. Inverter technology provides various advantages including energy savings compared to non-inverter air conditioners. Globally, the inverter modulates the compressor to continue operation despite reaching the set temperature. This study aimed to monitor the performance of split inverter air conditioners utilizing microcontroller technology. The microcontroller model employed was the ATmega 2560, capable of logging each test parameter and displaying in real-time. Additionally, the ATmega 2560 integrated sensors including the DS18B20 temperature sensor and PZEM 004-T multifunction electrical sensor. Monitoring occurred over one hour of operation on a 2.5 kW capacity split inverter AC. The experimental monitoring results show that the minimum temperature was recorded at Tsupply in comparison to the other temperature points. Tsupplywas found to attain a temperature of 8°C during the investigation. The findings for Treturn exhibit a similar declining trend, with the temperature reaching 25.5°C at approximately 3000 s. The lowest power fluctuations were observed at the remote temperature of 24°C compared to other remote temperatures. The average power consumption of the split inverter AC was approximately 750 W. Peak energy consumption was observed at 0.96 kWh during one hour of operation of the split inverter AC. Microcontroller-based experimental monitoring can provide real-time results and shows promise for monitoring split inverter AC performance.

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