Experimental Study of Active Magnetic Regenerator AMR Composed of Spherical GdNReportar como inadecuado


Experimental Study of Active Magnetic Regenerator AMR Composed of Spherical GdN


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An experimental study of an active magnetic regenerator AMR employing GdN was carriedout. Spherical GdN material was synthesized by the hot isostatic pressing HIP method. The specificheat was measured and the magnetic entropy change ΔS and adiabatic temperature changeΔTad were calculated. The refrigeration with an AMR cycle was tested in the temperature rangebetween 48 and 66 K with the field swinging from 1.2 to 3.7 T at upper side and from 2.0 to 4.0 Tat lower side of the regenerator bed filled with GdN spheres. A temperature span, ΔTspan,was foundto develop soon after starting the cycle and became more than 4.7 degree in steady state. Thistemperature span ΔTspan was at least 1.5 times as large as the adiabatic temperature change ΔTad.



International Cryocooler Conference 16th - 2008 - Atlanta, GA -



Autor: Hirayama, Y. - Okada, H. - Nakagawa, T. - Yamamoto, T. A. - Kusunose, T. - Numazawa, T. - Mastumoto, K. - Irie, T. - Nakamura, E.

Fuente: https://smartech.gatech.edu/







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