TY - JOUR
T1 - Performance characteristics of magnetic Brayton refrigeration cycles using Gd, Gd 0.74Tb 0.26 and (Gd 3.5Tb 1.5)Si 4 as the working substance
AU - Diguet, Gildas
AU - Lin, Guoxing
AU - Chen, Jincan
N1 - Funding Information:
The present work was supported by the National Natural Science Foundation (no. 51176160 ), the Ph.D. Program Foundation of Ministry of Education (no. 20090121110026 ) and the Postdoctoral Science Foundation, People's Republic of China .
PY - 2012/6
Y1 - 2012/6
N2 - Based on the experimental characteristics of the iso-field heat capacity changing with temperature for the room-temperature magnetic refrigeration materials Gd, Gd 0.74Tb 0.26, and (Gd 3.5Tb 1.5)Si 4, the corresponding entropy versus temperature curves are calculated and presented, the regenerative magnetic Brayton refrigeration cycles, using these magnetic materials as the working substances, are established. The non-perfect regenerative heat quantity, net cooling quantity, released heat quantity, coefficient of performance (COP) and other performance parameters of these magnetic Brayton refrigeration cycles are analyzed and calculated. Furthermore, the performance characteristics of the Brayton refrigeration cycles employing Gd, Gd 0.74Tb 0.26, and (Gd 3.5Tb 1.5)Si 4 as the working substance are evaluated and compared, the influence of non-perfect regenerative heat on the performance characteristics of these magnetic Brayton refrigeration cycles is revealed.
AB - Based on the experimental characteristics of the iso-field heat capacity changing with temperature for the room-temperature magnetic refrigeration materials Gd, Gd 0.74Tb 0.26, and (Gd 3.5Tb 1.5)Si 4, the corresponding entropy versus temperature curves are calculated and presented, the regenerative magnetic Brayton refrigeration cycles, using these magnetic materials as the working substances, are established. The non-perfect regenerative heat quantity, net cooling quantity, released heat quantity, coefficient of performance (COP) and other performance parameters of these magnetic Brayton refrigeration cycles are analyzed and calculated. Furthermore, the performance characteristics of the Brayton refrigeration cycles employing Gd, Gd 0.74Tb 0.26, and (Gd 3.5Tb 1.5)Si 4 as the working substance are evaluated and compared, the influence of non-perfect regenerative heat on the performance characteristics of these magnetic Brayton refrigeration cycles is revealed.
KW - Brayton cycle
KW - Magnetic refrigerator
KW - Regeneration
KW - Thermodynamics
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U2 - 10.1016/j.ijrefrig.2011.12.004
DO - 10.1016/j.ijrefrig.2011.12.004
M3 - Article
AN - SCOPUS:84862815376
SN - 0140-7007
VL - 35
SP - 1035
EP - 1042
JO - International Journal of Refrigeration
JF - International Journal of Refrigeration
IS - 4
ER -