Theoretical and experimental investigation of hydrodynamics and heat and mass transfer in zero gravity distillation by application of tailored capillary structures

应用定制毛细管结构对零重力蒸馏中的流体动力学和传热传质进行理论和实验研究

• 批准号: 249205677
• 负责人: Professorin Dr. Tatiana Gambaryan-Roisman
• 金额: --
• 依托单位: Lehrstuhl für Fluidverfahrenstechnik (FVT)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/249205677?language=en
• 关键词: Theoretical; experimental; investigation; hydrodynamics; heat

Zero gravity distillation is a separation process putting into practice the idea of process modularization and allowing the implementation of distillation process on micro scale. In this process, the fluid flow is driven by capillary forces, and this brings about several advantages. The previous investigations have shown that zero gravity distillation units have a similar separation performance as much higher conventional distillation columns. However, the further technology development in the field of zero gravity distillation is retarded due to the lack of design fundamentals. This is caused by the fact that the basic phenomena and subprocesses of zero gravity distillation are not yet sufficiently understood.The proposed project aims at the investigation of basic phenomena occurring in structural elements of the gravity distillation units as well as at the development of geometry-based design and optimization methods. To achieve these aims, multiscale modeling and high resolution experiments will be applied. As model capillary structures groove structures and capillary-porous structures will be chosen.In the theoretical and numerical part, the methods for the description of phenomena and subprocesses related to zero gravity distillation on single groove scale and on pore scale will be developed. The developed models will be integrated in a global model for the description of zero gravity distillation, which will be used to predict the effect of different capillary structures on separation efficiency.In experimental part, the transport processes will be studied in a laboratory-scale setup with exchangeable capillary structures. The temperature distribution in evaporator, condenser and in the separation area will be measured using thermocouples. The composition of the gas phase as well as of the bottom and distillate products will be determined using the FTIR method. For the capillary structures with large pores/grooves, the liquid distribution within the structure will be visualized.The results of the project will be used to optimize the geometry of capillary structures and the process parameters.

零重力精馏是一种将过程模块化的思想付诸实践的分离过程，允许在微尺度上实施精馏过程。在这个过程中，流体的流动是由毛细管力驱动的，这带来了几个优点。以往的研究表明，零重力精馏装置具有与更高的常规精馏塔相似的分离性能。然而，由于缺乏设计基础，阻碍了零重力蒸馏领域技术的进一步发展。这是因为对零重力蒸馏的基本现象和子过程还没有足够的了解。拟议的项目旨在调查重力蒸馏装置的结构元件中出现的基本现象，以及发展基于几何的设计和优化方法。为了实现这些目标，将采用多尺度建模和高分辨率实验。在理论和数值部分，提出了在单槽尺度和孔尺度上描述与零重力精馏相关的现象和子过程的方法。所开发的模型将被集成到描述零重力精馏的全球模型中，该模型将用于预测不同毛细结构对分离效率的影响。在实验部分，将在具有可交换毛细结构的实验室装置中研究传递过程。用热电偶测量蒸发器、冷凝器和分离区的温度分布。将使用FTIR方法确定气相以及底部和馏分产品的组成。对于具有大孔/槽的毛细结构，将可视化地显示结构内的液体分布。该项目的结果将用于毛细结构的几何形状和工艺参数的优化。