Temperature Distribution Measurement of Melted Plastic by Using Electrical Capacitance Tomography

2016 ◽  
Vol 2016 (0) ◽  
pp. J0510201
Author(s):  
Yusuke HIROSE ◽  
Kazuaki HATA ◽  
Masahiro TAKEI
Keyword(s):  
Temperature Distribution ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Distribution Measurement ◽  
Temperature Distribution Measurement ◽  
Capacitance Tomography

Electrical Capacitance Tomography Based Sorting Technique for Wasted Plastics

2015 ◽  
Author(s):  
Yusuke Hirose ◽  
Kazuaki Hata ◽  
Sapkota Achyut ◽  
Masahiro Takei
Keyword(s):  
Temperature Distribution ◽  
Relative Permittivity ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Time Step ◽  
Cross Sectional ◽  
Sorting Technique ◽  
The Many ◽  
Capacitance Tomography ◽  
Temperature Equation

This study has launched a concept to measure real time two-dimensional temperature distribution non-invasively by a combination of electrical capacitance tomography (ECT) technique and a permittivity-temperature equation for plastic pellets. The concept has two steps which are the relative permittivity calculation from the measured capacitance among the many electrodes by ECT technique, and the temperature distribution calculation from the relative permittivity distribution by permittivity-temperature equation. ECT sensor with 12-electrode is designed to measure and visualize the cross sectional temperature distribution during polymethyl methacrylate (PMMA) pellets cooling process. The images of the normalized relative permittivity distribution are successfully reconstructed at every time step during the process. The images indicate that the normalized relative permittivity of PMMA pellets is decreased as the temperature is decreased.

Applications of Electrical Capacitance Tomography for Research on Phenomena Occurring in the Fluidised Bed Reactors

2014 ◽  
Vol 35 (4) ◽  
pp. 397-408 ◽  
Author(s):  
Jan Porzuczek
Keyword(s):  
Temperature Distribution ◽  
Chemical Engineering ◽  
Electrical Capacitance Tomography ◽  
Fluidised Bed ◽  
Electrical Capacitance ◽  
Process Tomography ◽  
New Research ◽  
Capacitance Tomography ◽  
Data Acquiring ◽  
Metrological Requirements

Abstract The paper presents a review of current achievements in the Electrical Capacitance Tomography (ECT) in relation to its possible applications in the study of phenomena occurring in fluidised bed reactors. Reactors of that kind are being increasingly used in chemical engineering, energetics (fluidised bed boilers) or industrial dryers. However, not all phenomena in the fluidised bed have been thoroughly understood. This results in the need to explore and develop new research methods. Various aspects of ECT operation and data processing are described with their applicability in scientific research. The idea for investigation of temperature distribution in the fluidised bed, using multimodal tomography, is also introduced. Metrological requirements of process tomography such as sensitivity, resolution, and speed of data acquiring are noted.

Noninvasive Measurement of Temperature Distribution in a Pipe by Using Electrical Capacitance Tomography

2014 ◽  
Author(s):  
Yusuke Hirose ◽  
Kristian Basario ◽  
Tong Zhao ◽  
Masahiro Takei
Keyword(s):  
Temperature Distribution ◽  
Relative Permittivity ◽  
Melting Process ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Time Step ◽  
Cross Sectional ◽  
Non Invasive ◽  
Capacitance Tomography ◽  
Debye Equation

This study has launched a concept to measure real time two-dimensional temperature distribution non-invasively by a combination of electrical capacitance tomography (ECT) technique and Debye equation. The concept has two steps which are the relative permittivity calculation from the measured capacitance among the many electrodes by ECT technique, and the temperature distribution calculation from the relative permittivity distribution by Debye equation. ECT sensor with 8 or 12-electrode is designed to measure and visualize the cross sectional temperature distribution in heating water as a basic experiment and melting polycarbonate pellets as a main experiment. Consequently, it is found that the water capacitance is changed by 1.14×10−6F as every 1.0 degree Celsius water temperature change. Moreover, the images of the temperature distribution from the relative permittivity distribution are reconstructed at every time step during the polycarbonate melting process. The non-invasive temperature values by a combination of ECT technique and Debye equation were compared with the invasive temperature values by the thermocouples. The non-invasive values have a good agreement with the invasive values by approximate 5%.

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