Research into basic sensor technology for indirect measurement of viscosity and viscosity development of viscous materials by measuring their permittivity

研究间接测量粘度的基础传感器技术以及通过测量其介电常数来测量粘性材料的粘度发展

• 批准号: 423766948
• 负责人: Professor Dr.-Ing. Alexander Kölpin
• 金额: --
• 依托单位: Institut für Hochfrequenztechnik E-3
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/423766948?language=en
• 关键词: Research; into; basic; sensor; technology

The aim of the project is the realization of a technical solution for non-invasive measurement of the viscosity of fluids and its change over a pipe’s cross section. The proposed project includes fundamental researches of the not completely known relation between the viscosity and permittivity of a fluid. Based on the new findings, a tomographic in-line sensor for the measurement of the complex permittivity over different pipe’s cross sections in the microwave frequency range and the viscosity is build and examined. Within the project, the sensor principle is investigated and employed for two different applications. This includes the extraction of the spatial resolution of the hydrogen loading of liquid organic hydrogen carrier (LOHC-) compounds. LOHC-compounds are a promising approach for the storage and the transportation of energy generated by regenerative sources. For reliable use, it is essential to measure the hydrogen loading of LOHC compounds, which correlates with the stored energy. Moreover, it is planned to investigate the viscosity development of non-newtonian, viscose fluids, e.g. polymer melts in different pipe geometries. Until now, the fundamental relation between the geometry and viscosity of viscose fluids is unknown for certain configurations, which will also be examined in the course of this project. The first project phase comprises the design of a sensor system measuring the complex permittivity as a function of the temperature, shear rate and pressure of the fluid. Due to a parallel rheological characterization of the fluids, the relation between the measured values permittivity and viscosity can be extracted. Based on the findings of the previous investigations, the second project phase contains the design of a tomographic contactless measurement system for indirectly measuring the viscosity over a permittivity measurement. Meanwhile, a suitable test stand, which pumps fluids with different viscosities through different pipe geometries, is realized. To dimension and chose the pipeline elements and to research an extraction method of the viscosity and pipe geometry depending zeta-values, parallel simulations are done. The third project phase comprises the measurements of the local resolution of the viscosity at the test stand. Besides validating the functionality of measuring the hydrogen loading of the LOHC, the measurements serve for a detailed analysis of the pressure drop depending on the pipe geometry and the viscosity.

该项目的目的是实现一种非侵入性测量流体粘度及其在管道横截面上的变化的技术方案。拟议的项目包括对流体的粘度和介电常数之间尚不完全已知的关系的基础研究。基于这一新发现，建立了一种层析在线传感器，用于测量微波频率范围内不同管段的复介电常数和粘度。在该项目中，研究了传感器原理，并将其应用于两种不同的应用。这包括提取液态有机氢载体(LOHC-)化合物的载氢量的空间分辨率。LOHC-化合物是一种很有前途的可再生能源储存和运输方法。为了可靠地使用，测量LOHC化合物的氢载量是必不可少的，它与存储的能量相关。此外，还计划研究非牛顿粘胶流体的粘度发展，例如不同管道几何形状的聚合物熔体。到目前为止，对于某些构型，粘胶流体的几何和粘度之间的基本关系是未知的，这一点也将在本项目的过程中进行研究。第一个项目阶段包括设计一个传感器系统，测量作为温度、剪切速率和流体压力的函数的复介电常数。由于流体的平行流变特性，可以提取测量值的介电常数和粘度之间的关系。根据以前的研究结果，第二阶段的项目包括设计一种层析非接触式测量系统，用于间接测量介电常数测量中的粘度。同时，实现了一种合适的试验台，可以通过不同的管道几何形状泵送不同粘度的流体。为了确定管道单元的尺寸和选择，并研究了一种依赖Zeta值的粘度和管道几何形状的提取方法，进行了并行模拟。第三个项目阶段包括在试验台上测量粘度的局部分辨率。除了验证测量LOHC的氢负荷的功能外，这些测量还用于根据管道几何形状和粘度对压降进行详细分析。