• modelling an active magnetic refrigeration system: a comparison with different models of incompressible flow through a packed bed

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 514
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     active magnetic regenerative refrigeration system (amr) is an environmentally attractive refrigeration alternative to vapour compression plants. a magnetic refrigerator is composed of a regenerator that is a solid packed bed made of a magnetic material and a secondary heat transfer fluid flowing in the porous matrix. the secondary fluid can be a liquid (water or water anti-freezing mixture). modelling is a particularly cost-effective method for studying, designing and optimizing a magnetic refrigeration system. in this paper a comparison between three different models to simulate the thermo-fluidodynamic behaviour of an amr cycle is carried out. each model simulates both the magnetic material and the secondary fluid of an amr operating in conformity with a brayton regenerative cycle. in the reported models gdxdy1−x alloys are the constituent materials for the regenerator over the temperature range 260–280 k. the heat transfer medium is a water-glycol mixture (50% by weight).with these models, the refrigeration capacity, the power consumption and consequently the coefficient of performance of the cycle can be predicted.

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