【目的】探究CO2充入量与热泵干燥机系统功率、干燥室内温度、系统性能系数的关系,获得CO2最佳充入量。【方法】根据实际生产要求分析热泵干燥机的工作原理,搭建CO2热泵干燥试验平台；使用PLC采集数据和设计监测系统；进行CO2充入量试验。【结果】当CO2充入量为2．5 kg时,该系统功率达1200 W,干燥室内温度较高,达70℃,系统的能耗比(COP)为3．89,单位时间除湿量为1．636 kg·h-1。此时冷却器和蒸发器压力适宜,进出口温差较大。【结论】该系统能源利用率高,性能优。%Objective] To explore the relationship between CO2 filling amount and the performances of the heat pump dryer system including the system power, the drying chamber temperature and the system performance coefficient, and to determine the optimal CO2 filling amount.[Method]The working princi-ples of the heat pump dryer were analyzed according to the actual production requirements. The CO2 heat pump drying experimental platform was established. Data collection and monitoring system design were conducted by PLC. CO2 filling experiments were performed.[Result]When the CO2 filling amount was 2. 5 kg, the system power reached 1 200 W, the drying chamber temperature reached 70 ℃, the energy consumption rate (COP) was 3. 89, the dehumidification rate was 1. 636 kg·h-1, the pressures of the cooler and evaporator were suitable, and the temperature difference between inlet and outlet was relatively large.[Conclusion]This system has high energy efficiency and excellent performance.
展开▼
