Physics:Thermo-magnetic motor

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Short description: Magnet motor

Thermomagnetic motors (also known as Curie wheels,[1] Curie-motors[2][3] and pyromagnetic motors[4]) convert heat into kinetic energy using the thermomagnetic effect,[5] i.e., the influence of temperature on the magnetic material magnetization.[6]

Historical background

This technology dates back to 19th century, when a number of scientists submitted patents on the so-called "pyro-magnetic generators".[7] These systems operate in a magnetic Brayton cycle, in a reverse way of the magnetocaloric refrigerators.[8] Experiments have produced only extremely inefficient working prototypes,[9][10][11] however, thermodynamic analysis indicate that thermomagnetic motors present high efficiency related to Carnot efficiency for small temperature differences around the magnetic material Curie temperature.[8][5][12] The thermomagnetic motor principle has been studied as a possible actuator in smart materials,[13] being successful in the generation of electric energy from ultra-low temperature gradients.[14]

See also

References

  1. ↑ Alves, C.S.; Colman, F.C.; Foleiss, G.L.; Vieira, G.T.F.; Szpak, W. (November 2013). "Numerical simulation and design of a thermomagnetic motor". Applied Thermal Engineering 61 (2): 616–622. doi:10.1016/j.applthermaleng.2013.07.053. 
  2. ↑ Karle, Anton (October 2001). "The thermomagnetic Curie-motor for the conversion of heat into mechanical energy". International Journal of Thermal Sciences 40 (9): 834–842. doi:10.1016/S1290-0729(01)01270-4. 
  3. ↑ Trapanese, Marco (April 2011). "A dq axis theory of the magnetic, thermal, and mechanical properties of Curie motor". Journal of Applied Physics 109 (7): 07E706. doi:10.1063/1.3562505. ISSN 0021-8979. Bibcode: 2011JAP...109gE706T. https://iris.unipa.it/bitstream/10447/80505/1/Versio01.pdf. 
  4. ↑ Edison, T. A., "Pyromagnetic Motor", US Patent No. 380,100; Patented March 27, 1888.
  5. ↑ 5.0 5.1 Bessa, C.V.X.; Ferreira, L.D.R.; Horikawa, O.; Gama, S. (December 2018). "On the relevance of temperature, applied magnetic field and demagnetizing factor on the performance of thermomagnetic motors". Applied Thermal Engineering 145: 245–250. doi:10.1016/j.applthermaleng.2018.09.061. 
  6. ↑ Gama, Sergio; Ferreira, Lucas D. R.; Bessa, Carlos V. X.; Horikawa, Oswaldo; Coelho, Adelino A.; Gandra, Flavio C.; Araujo, Raul; Egolf, Peter W. (2016). "Analytic and Experimental Analysis of Magnetic Force Equations". IEEE Transactions on Magnetics 52 (7): 1–4. doi:10.1109/tmag.2016.2517127. 
  7. ↑ Ferreira, L.; Bessa, C.; Silva, I.; Gama, S. (2013). Green Design, Materials and Manufacturing Processes. pp. 107–111. doi:10.1201/b15002-23. ISBN 978-1-138-00046-9. 
  8. ↑ 8.0 8.1 Bessa, C. V. X.; Ferreira, L. D. R.; Horikawa, O.; Monteiro, J. C. B.; Gandra, F. G.; Gama, S. (2017). "On the influence of thermal hysteresis on the performance of thermomagnetic motors". Journal of Applied Physics 122 (24): 244502. doi:10.1063/1.5010356. Bibcode: 2017JAP...122x4502B. 
  9. ↑ Martin, Thomas Commerford; Wetzler, Joseph (1891). The electric motor and its applications. New York: W. J. Johnston. pp. 272–278. https://archive.org/details/electricmotoran00bellgoog. 
  10. ↑ Murakami, K.; Nemoto, M. (1972). "Some experiments and considerations on the behavior of thermomagnetic motors". IEEE Transactions on Magnetics 8 (3): 387–389. doi:10.1109/tmag.1972.1067406. Bibcode: 1972ITM.....8..387M. 
  11. ↑ Andreevskii, K. N.; Mandzhavidze, A. G.; Margvelashvili, I. G.; Sobolevskaya, S. V. (September 1, 1998). "Investigation of the thermodynamic and physical characteristics of a thermomagnetic engine with a gadolinium working element". Technical Physics 43 (9): 1115–1118. doi:10.1134/1.1259144. ISSN 1063-7842. Bibcode: 1998JTePh..43.1115A. 
  12. ↑ Egolf, Peter W.; Kitanovski, Andrej; Diebold, Marc; Gonin, Cyrill; Vuarnoz, Didier (2009). "Magnetic power conversion with machines containing full or porous wheel heat exchangers". Journal of Magnetism and Magnetic Materials 321 (7): 758–762. doi:10.1016/j.jmmm.2008.11.044. Bibcode: 2009JMMM..321..758E. 
  13. ↑ Smart Materials Structures of Systems, Allied Publishers, ISBN:8170239583, pages 23–25.
  14. ↑ Kishore, Ravi Anant; Davis, Brenton; Greathouse, Jake; Hannon, Austin; Emery Kennedy, David; Millar, Alec; Mittel, Daniel; Nozariasbmarz, Amin et al. (2019). "Energy scavenging from ultra-low temperature gradients". Energy & Environmental Science 12 (3): 1008–1018. doi:10.1039/C8EE03084G. ISSN 1754-5692. 




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