• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Gas-liquid mass transfer in a cross-flow hollow fiber module: Analytical model and experimental validation
【24h】

Gas-liquid mass transfer in a cross-flow hollow fiber module: Analytical model and experimental validation

机译：错流中空纤维组件中的气液传质：分析模型和实验验证

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The cross-flow operation of hollow fiber membrane contactors offers many advantages and is preferred over the parallel-flow contactors for gas-liquid mass transfer operations. However, the analysis of such a cross-flow membrane gas-liquid contactor is complicated due to the change in concentrations of both phases in the direction of flow as well as in the direction perpendicular to flow. In addition, changes in the volumetric flow rate of compressible fluid can also occur over the volume of membrane contactor. These hollow fiber membrane contactors resemble to the more conventional shell and tube cross-flow heat exchanges where a similar variation in the local driving force within the module occurs. Hence heat transfer analogy can be applied to predict the performance of these contactors. Analytical expressions are derived in this work to describe the mass transfer in these hollow fiber cross-flow contactors analogously to heat transfer in cross-flow shell and tube heat exchangers. CO_2 absorption experiments were carried out in a commercial as well as in the lab-made single-pass cross-flow hollow fiber membrane contactors to check the applicability of this heat transfer analogy under different conditions. Experimental results show that the derived analytical expressions can be applied to the cross-flow membrane gas-liquid contactor under the asymptotic conditions of negligible or small volumetric flow changes. However, in the case of significant changes in the flow rate of compressible fluid, the application of heat transfer analogy results into slight under predictions of the module performance. A more rigorous model is then required for an accurate prediction of the performance.
机译：中空纤维膜接触器的错流操作具有许多优点，在气液传质操作中比平行流接触器更可取。但是，由于两相的浓度在流动方向和垂直于流动方向上的变化，这种错流膜气液接触器的分析很复杂。另外，在膜接触器的整个体积上，可压缩流体的体积流量的变化也可能发生。这些中空纤维膜接触器类似于更常规的管壳式横流换热器，在该换热器中，模块内的局部驱动力会发生类似的变化。因此，可以将传热类比应用于预测这些接触器的性能。在这项工作中得到了解析表达式，用于描述这些中空纤维错流接触器中的传质，类似于错流壳管式换热器中的传热。在商业以及实验室制造的单程错流中空纤维膜接触器中均进行了CO_2吸收实验，以检查这种传热类比在不同条件下的适用性。实验结果表明，所推导的解析表达式可应用于体积流量变化可忽略或很小的渐近条件下的横流膜气液接触器。但是，在可压缩流体的流量发生显着变化的情况下，在模块性能的预测下，热传递类比的应用会导致轻微变化。因此，需要更严格的模型来准确预测性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号