Comparing superconducting and permanent magnets for magnetic refrigeration

Autor: R. Bjørk, K. K. Nielsen, C. R. H. Bahl, A. Smith, A. C. Wulff

Publikováno v: AIP Advances, Vol 6, Iss 5, Pp 056205-056205-6 (2016)

We compare the cost of a high temperature superconducting (SC) tape-based solenoid with a permanent magnet (PM) Halbach cylinder for magnetic refrigeration. Assuming a five liter active magnetic regenerator volume, the price of each type of magnet is

Externí odkaz: https://doaj.org/article/c45126664705455cbc00fdfe373f1939

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Intercomparison of long-term ground-based measurements of total, tropospheric, and stratospheric ozone at Lauder, New Zealand

Autor: R. Björklund, C. Vigouroux, P. Effertz, O. E. García, A. Geddes, J. Hannigan, K. Miyagawa, M. Kotkamp, B. Langerock, G. Nedoluha, I. Ortega, I. Petropavlovskikh, D. Poyraz, R. Querel, J. Robinson, H. Shiona, D. Smale, P. Smale, R. Van Malderen, M. De Mazière

Publikováno v: Atmospheric Measurement Techniques, Vol 17, Pp 6819-6849 (2024)

Long-term, 21st century ground-based ozone measurements are crucial to study the recovery of stratospheric ozone as well as the trends of tropospheric ozone. This study is performed in the context of the LOTUS (Long-term Ozone Trends and Uncertaintie

Externí odkaz: https://doaj.org/article/5b609a1dcd76410bb9866e627e12e94c

High power electromagnetic vibration harvesting using a magnetic dumbbell structure

Autor: P. Holm, C. Imbaquingo, B.P. Mann, R. Bjørk

Publikováno v: Holm, P, Imbaquingo, C, Mann, B P & Bjørk, R 2023, ' High power electromagnetic vibration harvesting using a magnetic dumbbell structure ', Journal of Sound and Vibration, vol. 546, 117446 . https://doi.org/10.1016/j.jsv.2022.117446

This paper considers an electromagnetic energy harvester consisting of a tube with two fixed magnets and two coils and containing a floating free-to-move dumbbell structure with two magnets. The dumbbell shape has a number of benefits, including an i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::48c618f518e2340dc03411c059fbeb7b
https://doi.org/10.1016/j.jsv.2022.117446