Study on the key ejector structures of the waste heat-driven ejector air conditioning system with R236fa as working fluid
Study on the key ejector structures of the waste heat-driven ejector air conditioning system with R236fa as working fluid
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DOI：
10.1016/j.enbuild.2012.02.009
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发表时间：
2012-06
影响因子：
6.7
通讯作者：
Bo Zhang;Xutong Song;J. Lv;J. Zuo
中科院分区：
文献类型：
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作者：
Bo Zhang;Xutong Song;J. Lv;J. Zuo
以R236fa为工质，对喷射器性能进行了数值模拟和实验研究，分析了喷射器关键几何尺寸对喷射器性能的影响。采用计算流体力学（CFD）方法对喷射器的流动过程和性能进行了数值模拟。本文提供了一个实例，喷嘴出口角度分别为8°、10°和14°，喷嘴出口到混合室的距离分别为23和33mm，扩压器长度分别为88和103mm。通过实验验证了CFD计算结果。结果表明，喷嘴出口角度为8°、喷嘴出口距混合室距离为23 mm、扩压器长度为88 mm的引射器性能最佳。
The ejector performance is numerically and experimentally studied using R236fa as working fluid to analyze the influence of the key geometries of ejector. The computational fluid dynamics (CFD) was employed to predict the flow process and performance of the ejector. A case study was provided in this paper, in which the angles of nozzle outlet were 8°, 10° and 14°, the distance of nozzle exit to mixing chamber was varied as 23 and 33mm and the length of diffuser was varied as 88 and 103mm. The CFD results were verified with an experiment. It can be concluded that, the ejector with the nozzle outlet angle of 8°, the distance of nozzle exit to mixing chamber of 23mm and the diffuser length of 88mm has the best performance.