Research on Monitoring Model of Refrigerant Stock in EMU Air Conditioning Units
This paper investigates the inventory monitoring and leakage issues of refrigerant R407C in air-conditioning units of high-speed trains.Based on theoretical equations such as the Peng-Robinson equation of state,this study explores the feasibility of calculating refrigerant inventory using volume,temperature,and pressure.Combined with a physical property database,a thermophysical model for refrigerant inventory monitoring based on dryness,temperature,pressure,and volume has been established.Experimental validation has shown that this model can effectively monitor the refrigerant inventory within the system,demonstrating high reliability.
EMUAir-conditioning unitRefrigerant inventoryMonitoring modelPeng-Robinson equation of stateDryness
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