MODELIRANJE MAGNETNEGA REGENERATORJA IN SREDSTVA ZA PRENOS TOPLOTE V MIKROKANALIH
Povzetek
V tem članku je uvodoma opisano kompresorskego hlajenje, ki mu sledi opis in zgodovina magnetnega hlajenja. Aktivni magnetni regenerator obsega 12 vzporednih plošč magnetokaloričnega materiala (gadolinij (Gd)), skozi katerega kroži tekočina za prenos toplote (v tem primeru voda). Na obeh koncih regeneratorja sta izmenjevalnika toplote. Vroči izmenjevalnik toplote (HHEX) in hladni izmenjevalnik toplote (CHEX) povezujeta tekočino z viri toplote. Načelo delovanja magnetne hladilne naprave temelji na izkoriščanju magnetokaloričnega učinka materialov, ki imajo te lastnosti (v tem primeru Gd).
Prenosi
Literatura
Sergiu Lionte: Caractérisation, étude et modélisation du comportement thermomagnétique d’un dispositif de réfrigération magnétique à matériaux non linéaires et point de Curie proche de la température ambiante, PhD Thesis, 2015
Brown, G. V.:Magnetic heat pumping near room temperature, Journal of Alloys and Compounds, 47(8), 3673‐3680, 1976
Kitanovski, A. Egolf: Thermodynamics of magnetic refrigeration, International journal of refrigeration, 29(3‐12), 3‐21, 2005
J Tusek, A Kitanovski, A Flisar et al:Active magnetic regenerator (AMR) experimental devices, în Fifth IIF‐IIR international conference on magnetic refrigeration at room temperature, Thermag V, Grenoble, France, 2012
Nellis, G., Engelbrecht, K., Klein, S., Zimm, C., and Russek, S.:Model and Evaluation Tools for Assessing Magnetocaloric Effect for Space Conditioning and Refrigeration Applications, 2004
Tishin, A. M., Gschneidner, K. A., and Pecharsky, V. K.:Magnetocaloric effect and heat capacity in the phase‐transition region, Physical Review B, 59(1), 503‐511, 1999
Tishin, A., and Spichkin, Y.:The Magnetocaloric Effect and its Applications., Institute of Physics Publishing, 2003
Kirol LD, Mills JI:Numerical analysis of thermomagnetic generators, J Appl Phys 56:824–828, 1984
Salomon D:Thermomagnetic mechanical heat engines, J Appl Phys 65:3687–3693, 1989
Pecharsky VK, Gschneidner KA Jr:Effect of alloying on the giant magnetocaloric effect of Gd5(Si2Ge2), J Magn Magn Mater 167:179–184, 1997
Sergiu Lionte et al.:Numerical analysis of a reciprocating active magnetic regenerator, Applied Thermal Engineering, ELSEVIER, 2014
C Vasile, C Muller:Innovative design of a magnetocaloric system, Int J Refrig, nr. 29:1318‐1326, 2006
C Vasile, C Muller:A new system for a magnetocaloric refrigerator, în First IIF‐IIR international conference on magnetic refriation at room temperature, Thermag I, Montreux, Switzerland, 2005
KW Lipso, KK Nilesen, DV Christensen et al: Measuring the effect of demagnetization in stacks of gadolinium plate using the magnetocaloric effect, J Magn Magn Mater, nr. 323:3027‐3032, 2011
C Aprea, A Grego, A Maiorino et al:Initial experimental results from a rotary permanent magnet magnetic refrigerator,Int J Refrig, vol. 43, nr. 111‐122, 2014
