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首页> 外文期刊>International Journal of Heat and Mass Transfer >Multi-factorial study of the absorption process of H_2O(vap) by a LiBr(aq) in a horizontal tube bundle using 2-ethyl-1-hexanol as surfactant
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Multi-factorial study of the absorption process of H_2O(vap) by a LiBr(aq) in a horizontal tube bundle using 2-ethyl-1-hexanol as surfactant

机译：以2-乙基-1-己醇为表面活性剂的水平管束中LiBr（aq）吸收H_2O（vap）过程的多因素研究

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摘要

This paper presents the results of a series of experimental tests about the absorption of water vapour by an aqueous lithium bromide solution over a bundle of 14 smooth tubes, using an alcohol (2-ethyl-1-hexanol) as surfactant. It follows the same multi-factorial methodology used in a previous article, in order to compare with the experiences without the alcohol. The study reveals that the 2-ethyl-1-hexanol strongly affects the hydrodynamics and the heat and mass transfer as is already known. However, new insight about the absorption process is gained by comparing our experiences with less common theoretical works on falling film stability where some parallelisms are identified. As a result, the main parameters that control this dynamic process seem to be the Marangoni number and also the Reynolds number, as many authors would point out as obvious. But it is much less obvious, that they do interact with each other to create a stability window and to determine the pattern of the flow and therefore the mass transfer rate. Finally in the conclusions a comment on how this could be used in practice is also done and some further research proposed, as for instance, the implication, or not, of the Soret effect in the inter-phase dynamics of the surfactant (2-ethyl-1-hexanol in our case) for aqueous lithium bromide solutions.
机译：本文介绍了一系列实验测试的结果，这些实验使用醇（2-乙基-1-己醇）作为表面活性剂，通过一捆14根光滑管对溴化锂水溶液吸收水蒸气的结果。它采用了上一篇文章中使用的相同的多因素方法，以便与没有酒精饮料的经历进行比较。研究表明，众所周知，2-乙基-1-己醇会极大地影响流体动力学以及传热和传质。然而，通过将我们的经验与不常见的关于降膜稳定性的理论著作进行比较，可以得出有关吸收过程的新见解，其中确定了一些平行性。结果，控制此动态过程的主要参数似乎是Marangoni数和雷诺数，正如许多作者指出的那样。但是，它们之间确实相互作用会创建一个稳定窗口并确定流的模式，从而确定质量传递率，这要明显得多。最后，在结论中还对如何在实践中使用该方法进行了评论，并提出了一些进一步的研究，例如，Soret效应是否涉及表面活性剂（2-乙基）的相间动力学。 -1-己醇）用于溴化锂水溶液。

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