团队博士刘亦琳关于关于膜组件分布特性的研究论文“Effects of fiber bundle nonuniformity on dehumidification performance and energy efficiency of pressure-driven membrane modules”发表于最具期刊International Journal of Energy Research

Dr. Liu Yilin published a paper titled “Effects of fiber bundle nonuniformity on dehumidification performance and energy efficiency of pressure-driven membrane modules in International Journal of Energy Research.

Fig. 1 Mass fraction distributions of water vapor in the permeate domain on x-y cross-section: (a) Regular arrangement; (b) Random arrangements (Random 1)

(a)                                                                           (b)

Fig. 2 The variation of average mass fraction along the dimensionless length (l^*) in the feed and permeate domains: (a) Ф = 9.3%; (b) Ф = 47%.  

纤维束的不均匀性在很大程度上影响了压力驱动膜组件壳侧的流动状态，从而影响了膜系统的除湿性能和能效。为了探讨纤维束不均匀性对膜组件性能的影响，建立了不同纤维排列和填充率的三维膜除湿模型，综合评价了膜组件的摩擦因子、除湿率和能效。研究发现，规则排布膜组件的除湿率略优于随机排布膜组件，但随着纤维填充率的增加，这种优势逐渐减弱。在相同的空气参数、操作条件和纤维直径下，纤维分布对除湿COP的影响不显著。除湿率随纤维填充率的增加而显著提高。填充率为47%时，除湿率达到94.88%，且流动阻力最大。无量纲分析表明，纤维填充率为21.5%~23%的膜组件在平衡综合除湿性能和能效两方面表现最佳。

The physical permeation-based membrane dehumidification technology has excellent energy saving capacity. The nonuniformity of fiber bundles affects largely the flow status in the shell side of pressure-driven membrane modules, and therefore the dehumidification performance and energy efficiency of the membrane system. To explore the effects of fibre bundles nonuniformity, three-dimensional membrane dehumidification models with different fiber arrangements and filling rates were developed. The friction coefficient, dehumidification rate and energy efficiency of membrane system were discussed for the comprehensive evaluation of module performance. It is found that the dehumidification rate of regular configuration is slightly better than that of random configuration, but the advantage is gradually weakened with the increase of filling rate. Under the same air parameters, operating conditions and fiber size, the fiber distribution has negligible effect on the dehumidification COP. The dehumidification rate rises significantly with the filling rate, up to 94.88% at a 47% filling rate accompanied with the maximum flow resistance. The dimensionless analysis indicates that the membrane module with a filling rate of 21.5%~23% would achieve an optimal performance in terms of system energy efficiency and overall dehumidification capacity.

文章链接：http://doi.org/10.1002/er.8128