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HADI GANJEHSARABI,IBRAHIM DINCER,ALI GUNGOR 대한설비공학회 2013 International Journal Of Air-Conditioning and Refr Vol.21 No.3
In the present study, a thermodynamic model is proposed to analyze and assess the performance,through energy and exergy, of a cascade active magnetic regenerative (AMR) refrigerator operation a regenerative Brayton cycle. This cascade refrigeration system works with GdxTb1x alloys as magnetic materials where the composition of the alloy varies for di®erent stages. In this model, the heat transfer °uid considered is a water– glycol mixture (50% by weight). The refrigeration capacity,total power consumption, coe±cients of performance (COP), exergy e±ciency and exergy destruction rate of a cascade AMR refrigeration (AMRR) system are determined. To understand the system performance more comprehensively, a parametric study is performed to investigate the e®ects of several important design parameters on COP and exergy e±ciency of the system.