科研之友
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摘要
Considering the difference of magneto-caloric materials(MCMs) diameter and its random distribution in the cross-section of active magnetic regenerator (AMR),a novel two dimensional porous model of AMR is established.Comparing experimental and simulative results,the trends in the two curves are approximately same.In some areas,errors cannot be neglected,but it is in a acceptable range.The impact of mass flow rate of the heat transfer fluid (HTF),AMR's rotary speed and magnetic field intensity on cooling capacity have also been investigated.The simulation results show that the increasing of the HTF's mass flow rate is helpful to neutralize the unfavorable influence of the residual HTF.With the rotary speed increasing,the heat transfer time between HTF and the MCMs shorten,which is harmful to refrigerator's performance.However,this harmful influence can be weaken when mass flow rate increase.With higher magnetic field intensity,higher performance of refrigeration can be obtained.And it is also useful to reduce the impact of the residual HTF in the AMR lattice.
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