Thermal Analysis and Temperature Monitoring of a Coil for Magnetic Orientation of Steel Fibers in Cement Composites

Kordasz, Michał; Kaźmierowski, Maciej

doi:10.2478/czoto-2025-0035

Abstract

The study presents an experimental and numerical analysis of temperature variations in a coil used for the magnetic orientation of steel fibers in cement composites. The aim of the research was to assess the thermal safety of the coil during operation and to verify the consistency between experimental measurements and numerical simulations. The test setup consisted of a multilayer coil equipped with seven thermistors placed between the winding layers, enabling real-time temperature recording during a 16-minute power supply and subsequent natural cooling. Numerical analyses were performed in the ANSYS Maxwell environment using a coupled magnetostatic–thermal model that accounted for Joule losses and natural convection. Comparison of the experimental and numerical results showed good agreement (MAE = 1.43°C, MAPE = 3.36%). A nonuniform temperature distribution was observed in the winding, with central layers heating up by approximately 15% more than the outer ones. The results indicate that the analyzed coil, without active cooling, can operate safely only in an intermittent mode. The proposed temperature monitoring method and the regression-based temperature profile description can serve as a basis for the design and thermal optimization of coils used in the magnetic orientation of steel fibers in cement composites.

References

Akre, S., Fofana, I., Yéo, Z., Brettschneider, S., Kung, P., Sékongo, B., 2023. On the Feasibility of Monitoring Power Transformer’s Winding Vibration and Temperature along with Moisture in Oil Using Optical Sensors, Sensors, 23(4), p. 2310, DOI: 10.3390/s23042310
Search in Google Scholar Back to article
Al Rifai, M. M., Sikora, K. S., Hadi, M. N. S., 2024. Magnetic alignment of micro steel fibers embedded in self – compacting concrete, Construction and Building Materials, 412, 134796, DOI: 10.1016/j.conbuildmat.2023.134796
Search in Google Scholar Back to article
Cai, C., Wang, J., Wan, L., Wang, C., Yuan, Z., Zhang, J., Lin, H., Shao, J., 2024. Optical Fiber Composite Winding for In Situ Thermal Monitoring of Transmitter Magnetic Mechanism in Long – Track DWPT Systems, IEEE Transactions on Instrumentation and Measurement, 73, 1–4, DOI: 10.1109/TIM.2023.3329107
Search in Google Scholar Back to article
Cao, Q., Han, X., Lai, Z., Xiong, Q., Zhang, X., Chen, Q., Xiao, H., Li, L., 2015. Analysis and reduction of coil temperature rise in electromagnetic forming, Journal of Materials Processing Technology 225, 185–194. DOI: 10.1016/j.jmatprotec.2015.02.006
Search in Google Scholar Back to article
Carrera, K., Künzel, K., Konrád, P., Sovják, R., Papež, V., Mára, M., Fornůsek, J., Kheml, P., 2022. Concrete lintels reinforced with steel fibres oriented by a magnetic field. Acta Polytechnica, 62(5), 531 – 537. DOI: 10.14311/AP.2022.62.053
Search in Google Scholar Back to article
Domski, J., Laskowska – Bury, J., Dudzińska, A., 2025. Cracking Behavior of Fiber – Reinforced Concrete Beams Made of Waste Sand, Applied Sciences, 15(9), 4790, DOI: 10.3390/app15094790
Search in Google Scholar Back to article
Ferrández, D., Saiz, P., Morón, C., Dorado, M. G., Morón, A., 2019. Inductive method for the orientation of steel fibers in recycled mortars, Construction and Building Materials, 222, 243–253, DOI: 10.1016/j.conbuildmat.2019.06.113
Search in Google Scholar Back to article
Gezegin, C., Ozgonenel, O., Dirik, H., 2021. A Monitoring Method for Average Winding and Hot – Spot Temperatures of Single – Phase, Oil – Immersed Transformers, IEEE Transactions on Power Delivery, 36(5), 3196–3203. DOI: 10.1109/TPWRD.2020.3035842
Search in Google Scholar Back to article
Ghailan, D. B., Al – Ghalib, A. A., 2020. Magnetic alignment of steel fibres in self – compacting concrete, Australian Journal of Structural Engineering, 21(1), 333–341, DOI: 10.1080/13287982.2019.1643642
Search in Google Scholar Back to article
Gies, S., Tekkaya, A.E., 2017. Analytical prediction of Joule heat losses in electromagnetic forming coils, Journal of Materials Processing Technology 246, 102–115. DOI: 0.1016/j.jmatprotec.2017.03.008
Search in Google Scholar Back to article
Karunakaran, P., Osman, M.S., Karuppanna, V., Cheng, S.C., Lee, M.D., Fadhilah, M.D., Lau, A., 2020. Eddy Current versus Joule Heating Effects for a Cable Suspended in an Iron Pipe, in: 2020 IEEE International Conference for Innovation in Technology (INOCON). Presented at the 2020 IEEE International Conference for Innovation in Technology (INOCON), 1–6. DOI: 10.1109/INOCON50539.2020.9298438
Search in Google Scholar Back to article
Kaźmierowski, M., Kadela, M., Kordasz, M., Chyliński, F., Jaskulski, R., Drzazga, M., Wydra, M., Marchwicki, K., Cińcio, A., 2025. Cementitious Composites Reinforced with Magnetically Oriented Steel Microfibers: Mechanical Properties, Deformability and Fracture Propagation, Materials, 20(18), 4739, DOI: 10.3390/ma18204739
Search in Google Scholar Back to article
Konovalov, D., Tolstorebrov, I., Eikevik, T.M., Kobalava, H., Radchenko, M., Hafner, A., Radchenko, A., 2023. Recent Developments in Cooling Systems and Cooling Management for Electric Motors, Energies 16, 7006. DOI: 10.3390/en16197006
Search in Google Scholar Back to article
Kunicki, M., Borucki, S., Zmarzły, D., Frymus, J., 2020. Data acquisition system for on – line temperature monitoring in power transformers, Measurement, 161, p. 107909, DOI: 10.1016/j.measurement.2020.107909
Search in Google Scholar Back to article
Lin, C. – M., Liu, H. – Y., Tseng, K. – Y., Lin, S. – F., 2019. Heating, Ventilation, and Air Conditioning System Optimization Control Strategy Involving Fan Coil Unit Temperature Control, Applied Sciences 9, 2391. DOI: 10.3390/app9112391
Search in Google Scholar Back to article
Michels, J., Gams, M., 2016. Preliminary study on the influence of fibre orientation in fibre reinforced mortars, Građevinar, 68(8), 645–655, DOI: 10.14256/JCE.1356.2016
Search in Google Scholar Back to article
Mohammed, A., Djurović, S., 2017. FBG Thermal Sensing Features for Hot Spot Monitoring in Random Wound Electric Machine Coils, IEEE Sensors Journal, 17(10), 3058–3067, DOI: 10.1109/JSEN.2017.2691137
Search in Google Scholar Back to article
Mu, R., Li, H., Qing, L., Lin, J., Zhao, Q., 2017. Aligning steel fibers in cement mortar using electromagnetic field, Construction and Building Materials, 131, 309–316, DOI: 10.1016/j.conbuildmat.2016.11.081
Search in Google Scholar Back to article
Song, D., Liu, W., Yin, Z., Li, X., Wang, Q., Yan, X., Zhang, X., Wang, F., Qin, Y., Shen, Y., Zhang, Z., Zhao, Y., Cheng, T., 2023. A temperature sensor based on Er3+/Yb3+ co – doped tellurite fiber for real – time thermal monitoring of transformers, Ceramics International, 49(17, Part B), 28878–28885, DOI: 10.1016/j.ceramint.2023.06.156
Search in Google Scholar Back to article
Šonka, Š., Petřík, M., 2023. Towards Hybrid Fibre Reinforced Concrete Exposed to Electromagnetic Field, AIP Conference Proceedings, 2780(1), Article 020020, in: Special Concrete and Composites 2021: 18th International Conference, Skalský Dvůr, Czech Republic, AIP Publishing LLC, Melville, NY, DOI: 10.1063/5.0137065.
Search in Google Scholar Back to article
Szeląg, M., 2020. Application of an Automated Digital Image – Processing Method for Quantitative Assessment of Cracking Patterns in a Lime Cement Matrix, Sensors, 20(14), 3859, DOI: 10.3390/s20143859
Search in Google Scholar Back to article
Villar, V.P., Medina, N.F., 2018. Alignment of hooked – end fibres in matrices with similar rheological behaviour to cementitious composites through homogeneous magnetic fields, Construction and Building Materials 163(2), 256 – 266, DOI: 10.1016/j.conbuildmat.2017.12.084
Search in Google Scholar Back to article
Xue, W., Chen, J., Xie, F., Feng, B., 2018. Orientation of Steel Fibers in Magnetically Driven Concrete and Mortar, Materials 11(1) 170, DOI: 10.3390/ma11010170
Search in Google Scholar Back to article

Thermal Analysis and Temperature Monitoring of a Coil for Magnetic Orientation of Steel Fibers in Cement Composites

Abstract

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