阀门控制传质过程对太阳能吸附式制冷系统性能的影响

Influence of Mass Transfer Process of Solar Adsorption Refrigeration System with Valve Control

以活性炭-甲醇为工质对的翅片管式太阳能吸附制冷系统为对象,对系统在带阀门控制传质过程下的制冷性能和无阀门控制传质过程下的制冷性能进行了对比研究;并对在带阀门控制传质过程下最高解吸温度及关闭阀门时间与系统性能的关系进行了分析研究.实验结果表明:在同等天气条件下,系统在阀门控制传质过程下的制冷效率整体上比在无阀门控制传质过程下的制冷效率平均高出36.7%;系统关闭阀门时间在吸附集热床达到最高温度之后的35分钟之内,系统的制冷效果最好,关闭阀门时间越久,系统制冷效率越低.研究结果可为太阳能吸附制冷系统的优化设计提供参考.

In the paper, the refrigeration performance of mass transfer process with valve control and mass transfer process without valve control have been researched and compared, meanwhile the relationship among maximum desorption temperature, closure valve time and system per- formance have been researched and analysed under mass transfer process with valve control, whose foundation is a fin-tube solar adsorption cooling system using activated carbon-methanol as working pairs. The experimental result showed that, in the same weather conditions, refrigera- tion performance of mass transfer process with valve control is averagely 36.7% higher than that without valve control; the system has the best refrigeration performance if valve is closed at 35 minutes after the adsorption collector bed achieving the maximum temperature, but refrigeration efficiency of system is lower if closure valve is later. The study results can offer references for design and optimization of solar adsorption refrigeration system.