Experimental Progress in the Development of a Metal Foil Pump for DEMO
Experimental findings to contribute to the preliminary design of a metal foil pump for fuel separation in the Direct Internal Recycling loop of the DEMO fusion device are presented. In parametric studies on a small-scale superpermeation experiment with a microwave plasma source and two different met...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Plasma |
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| Online Access: | https://www.mdpi.com/2571-6182/6/4/49 |
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| author | Yannick Kathage Alejandro Vazquez Cortes Stefan Merli Christian Day Thomas Giegerich Stefan Hanke Juri Igitkhanov Andreas Schulz Matthias Walker |
| author_facet | Yannick Kathage Alejandro Vazquez Cortes Stefan Merli Christian Day Thomas Giegerich Stefan Hanke Juri Igitkhanov Andreas Schulz Matthias Walker |
| author_sort | Yannick Kathage |
| collection | DOAJ |
| description | Experimental findings to contribute to the preliminary design of a metal foil pump for fuel separation in the Direct Internal Recycling loop of the DEMO fusion device are presented. In parametric studies on a small-scale superpermeation experiment with a microwave plasma source and two different metal foil materials, niobium Nb and vanadium V, a substantial increase in permeation with plasma power and with a decrease in pressure was observed. To ease operation in the typical fusion environment, in-situ heating procedures were developed to recover from impurity contamination. The temperature independence of plasma-driven permeation from 600 to 900 °C metal foil temperature was demonstrated. No proof of an isotopic effect for plasma-driven permeation of protium and deuterium could be found. The highest repeatable permeation flux achieved was 6.7 Pa∙m<sup>3</sup>/(m<sup>2</sup>∙s) or ~5.5 × 10<sup>−3</sup> mol H/(m<sup>2</sup>∙s). The found compression ratios do safely allow the operation of the metal foil pump using ejector pumps as backing stages for the permeate. In a dedicated experimental setup, the operation of the plasma source in a strong magnetic field was tested. Parametric studies of pressure, power input, magnetic flux density, field gradient and field angle are presented. |
| first_indexed | 2024-03-08T20:25:57Z |
| format | Article |
| id | doaj.art-56c081d2bf2a42fe86f1990f75d97882 |
| institution | Directory Open Access Journal |
| issn | 2571-6182 |
| language | English |
| last_indexed | 2024-03-08T20:25:57Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plasma |
| spelling | doaj.art-56c081d2bf2a42fe86f1990f75d978822023-12-22T14:35:25ZengMDPI AGPlasma2571-61822023-11-016471473410.3390/plasma6040049Experimental Progress in the Development of a Metal Foil Pump for DEMOYannick Kathage0Alejandro Vazquez Cortes1Stefan Merli2Christian Day3Thomas Giegerich4Stefan Hanke5Juri Igitkhanov6Andreas Schulz7Matthias Walker8Institute of Technical Physics (ITEP), Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, GermanyInstitute of Technical Physics (ITEP), Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, GermanyInstitute of Interfacial Process Engineering and Plasma Technology (IGVP), University of Stuttgart, 70174 Stuttgart, GermanyInstitute of Technical Physics (ITEP), Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, GermanyInstitute of Technical Physics (ITEP), Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, GermanyInstitute of Technical Physics (ITEP), Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, GermanyInstitute of Technical Physics (ITEP), Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, GermanyInstitute of Interfacial Process Engineering and Plasma Technology (IGVP), University of Stuttgart, 70174 Stuttgart, GermanyInstitute of Interfacial Process Engineering and Plasma Technology (IGVP), University of Stuttgart, 70174 Stuttgart, GermanyExperimental findings to contribute to the preliminary design of a metal foil pump for fuel separation in the Direct Internal Recycling loop of the DEMO fusion device are presented. In parametric studies on a small-scale superpermeation experiment with a microwave plasma source and two different metal foil materials, niobium Nb and vanadium V, a substantial increase in permeation with plasma power and with a decrease in pressure was observed. To ease operation in the typical fusion environment, in-situ heating procedures were developed to recover from impurity contamination. The temperature independence of plasma-driven permeation from 600 to 900 °C metal foil temperature was demonstrated. No proof of an isotopic effect for plasma-driven permeation of protium and deuterium could be found. The highest repeatable permeation flux achieved was 6.7 Pa∙m<sup>3</sup>/(m<sup>2</sup>∙s) or ~5.5 × 10<sup>−3</sup> mol H/(m<sup>2</sup>∙s). The found compression ratios do safely allow the operation of the metal foil pump using ejector pumps as backing stages for the permeate. In a dedicated experimental setup, the operation of the plasma source in a strong magnetic field was tested. Parametric studies of pressure, power input, magnetic flux density, field gradient and field angle are presented.https://www.mdpi.com/2571-6182/6/4/49metal foil pumpdirect internal recyclingsuperpermeationhydrogen separationfuel cycle |
| spellingShingle | Yannick Kathage Alejandro Vazquez Cortes Stefan Merli Christian Day Thomas Giegerich Stefan Hanke Juri Igitkhanov Andreas Schulz Matthias Walker Experimental Progress in the Development of a Metal Foil Pump for DEMO Plasma metal foil pump direct internal recycling superpermeation hydrogen separation fuel cycle |
| title | Experimental Progress in the Development of a Metal Foil Pump for DEMO |
| title_full | Experimental Progress in the Development of a Metal Foil Pump for DEMO |
| title_fullStr | Experimental Progress in the Development of a Metal Foil Pump for DEMO |
| title_full_unstemmed | Experimental Progress in the Development of a Metal Foil Pump for DEMO |
| title_short | Experimental Progress in the Development of a Metal Foil Pump for DEMO |
| title_sort | experimental progress in the development of a metal foil pump for demo |
| topic | metal foil pump direct internal recycling superpermeation hydrogen separation fuel cycle |
| url | https://www.mdpi.com/2571-6182/6/4/49 |
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