Monitoring of fouling within pipes using Electrical Impedance Spectroscopy
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Ronnie Anseth
Ronnie Anseth held a Bachelor of engineering in Cybernetics from Oslo University College (OUC) in 2009, and a Master of Technology in System and Control Engineering from Telemark University College (TUC) in 2011. Currently (2018) a PhD student at University of South-Eastern Norway (USN). TUC merged with several university colleges into University of South-Eastern Norway (USN) in 2018.
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Nils-Olav Skeie
Nils-Olav Skeie held a Master of Science in Cybernetic from Norwegian University of Science and Technology (NTNU) from 1985 and a PhD in Cybernetics from NTNU and Telemark University College (TUC) from 2008. TUC merged with several university colleges into University of South-Eastern Norway (USN) in 2018. He has industrial experience from 1985 to 2003 with system design, both software and hardware development, within the aviation and maritime sectors. He has academic experience from 2003, and been an Associate Professor at USN since 2008, teaching in measurement techniques, software design and system design on B. Sc. and M. Sc. levels. He supervises B. Sc., M. Sc. and PhD students. His main research areas are within smart cities and smart buildings, with focus on energy and welfare systems, soft sensors, sensor networks, and level measurements.
Magne Waskaas is professor at University of South-eastern Norway, in automation. He graduated in physics at Norwegian University of Science and Technology, Trondheim and received a PhD in the field of magnetoelectrochemistry at the University of Oslo. His research interests include industrial measurements and effects of electric and magnetic fields on electrochemical processes.
Abstract
The objective of the study described in this paper was to evaluate a monitoring system for fouling in pipes, based on impedance measurements using only one fixed frequency. The monitoring system observed the fouling growth (deposition layer and corrosion) inside a pipe which was subjected to a constant flow of liquid. The measurement frequency was specifically selected to optimize the sensitivity of the monitoring system towards the fouling growth. An electrical potential difference was applied to the pipe to generate an electrical field to accelerate the fouling growth in the experiment. Experimental results show a measurable change in the impedance magnitude (fouling growth) over the duration of the experiment (8 weeks). Results indicate that the measurement system, using one fixed frequency, is capable of in-situ monitoring of fouling growth in a pipe with a continuous flow of liquid.
Zusammenfassung
Das Ziel der hier beschriebenen Studie war es ein Überwachungssystem für Versinterungen in Rohren zu schaffen, dass, basierend auf einer Impedanzmessung, bei nur einer optimiert ausgewählten Frequenz arbeitet. Das System analysiert sowohl die Entstehung als auch das Fortschreiten von Sinterablagerungen und Korrosion in Rohren, die von einem konstanten Flüssigkeitsstrom durchströmt sind. Die Messfrequenz wird so gewählt, dass sie die Empfindlichkeit des Überwachungssystems gegenüber der Sinterdicke optimiert. Zur Beschleunigung des Sinterwachstums wurde elektrochemisch motiviert eine geeignete Potenzialdifferenz zwischen Rohr und Zentralelektrode angelegt. Die Ergebnisse zeigen einen eindeutigen Trend der Zunahme der Impedanz während der Dauer des Experiments von 8 Wochen. Die Ergebnisse unterstützen die ursprüngliche Annahme, dass ein System mit einer fest eingestellten Frequenz zur Überwachung des Sinterwachstums in einem Rohr geeignet ist.
About the authors
Ronnie Anseth held a Bachelor of engineering in Cybernetics from Oslo University College (OUC) in 2009, and a Master of Technology in System and Control Engineering from Telemark University College (TUC) in 2011. Currently (2018) a PhD student at University of South-Eastern Norway (USN). TUC merged with several university colleges into University of South-Eastern Norway (USN) in 2018.
Nils-Olav Skeie held a Master of Science in Cybernetic from Norwegian University of Science and Technology (NTNU) from 1985 and a PhD in Cybernetics from NTNU and Telemark University College (TUC) from 2008. TUC merged with several university colleges into University of South-Eastern Norway (USN) in 2018. He has industrial experience from 1985 to 2003 with system design, both software and hardware development, within the aviation and maritime sectors. He has academic experience from 2003, and been an Associate Professor at USN since 2008, teaching in measurement techniques, software design and system design on B. Sc. and M. Sc. levels. He supervises B. Sc., M. Sc. and PhD students. His main research areas are within smart cities and smart buildings, with focus on energy and welfare systems, soft sensors, sensor networks, and level measurements.
Magne Waskaas is professor at University of South-eastern Norway, in automation. He graduated in physics at Norwegian University of Science and Technology, Trondheim and received a PhD in the field of magnetoelectrochemistry at the University of Oslo. His research interests include industrial measurements and effects of electric and magnetic fields on electrochemical processes.
Acknowledgment
The main author is grateful for the PhD position provided by the University of South-Eastern Norway making this research possible.
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© 2018 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Beiträge
- Kompensation des frequenzabhängigen Fehlers in der Strommessung bei der Bestimmung von Magnetisierungskennlinien und -verlusten
- Verfahren zur reflexionsbasierten Temperaturermittlung bei magnetostriktiven Längenmesssystemen
- A modified approach for automated reference point determination of SLR and VLBI telescopes
- Monitoring of fouling within pipes using Electrical Impedance Spectroscopy
- Vergleich von Wasser und Wasser-Glykol-Gemischen bei der Temperaturmessung
Articles in the same Issue
- Frontmatter
- Beiträge
- Kompensation des frequenzabhängigen Fehlers in der Strommessung bei der Bestimmung von Magnetisierungskennlinien und -verlusten
- Verfahren zur reflexionsbasierten Temperaturermittlung bei magnetostriktiven Längenmesssystemen
- A modified approach for automated reference point determination of SLR and VLBI telescopes
- Monitoring of fouling within pipes using Electrical Impedance Spectroscopy
- Vergleich von Wasser und Wasser-Glykol-Gemischen bei der Temperaturmessung
