吸收式制冷利用低品位热源为驱动,具有结构简单、运转安静、节能环保等特点,有很大的发展空间.适当的离子液体和CO2可以构成吸收式制冷的工质对,这类吸收制冷工质对可以工作在较高压力,有利于吸收制冷系统的小型化,具有潜在的应用前景.以1-丁基-3-甲基咪挫六氟硼酸盐[bmim][PF6]为例,计算分析了一种离子液体-CO2跨临界吸收式制冷循环的性能,发现该循环的热力性能还并不理想,然后从工质对溶解度和反应热方面分析了原因,给出了进一步研究的方向.%Using Low-grade heat source, absorption refrigeration with many advantages such as being simple and quiet, along with energy-saving and environmental protection, has a huge space for development. Suitable ionic liquid combined with carbon dioxide can form a working pair for absorption refrigeration. Because of higher pressure operation, this new working pair can be much more miniaturized compared with conventional absorption refrigeration. In this paper, one kind of ionic liquid, 1-n-butyl-3-methylimidazolium tetrafluoroborate was taken as an example, and an transition-critical absorption refrigeration system by using the working pair of the ionic liquid and carbon dioxide was analyzed. According to the calculation, its refrigeration performance is not so satisfactory yet. Then, the discussion was made on the solubility and reaction heat, and some suggestions for further research were given.
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