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《Journal of Refrigeration》 2017-05
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Influence of Operating Frequency and Ambient Temperature on Reciprocating Magnetic Cooling

Wang Qi;Liu Bin;Chen Aiqiang;Li Peng;Tianjin Key Lab of Refrigeration Technology,Tianjin University of Commerce;  
To analyze the influence of different working frequencies and room temperatures on the cooling span of a reciprocating roomtemperature magnetic refrigeration system,a setup for such a system was designed with granular Gd( particle size: 0. 3-0. 5 mm) as the magnetic working mass. The cooling temperature of the reciprocating room-temperature magnetic refrigeration system was then analyzed,combined with the heat transfer characteristics in the active cooler during the experiment. A 1. 5 T permanent magnet field strength was maintained,and the changes in the cold-and hot-end temperatures of the cold accumulator were measured at different operating frequencies( 0. 07,0. 12,0. 16,0. 19,0. 22 Hz) and room temperatures( 14. 5,15. 9,16. 7,18. 1 ℃). The results show that,when the operating frequency is 0. 22 Hz,the maximum refrigeration temperature span of the system is 12. 8 ℃. Further,when the Gd temperature is lower than the Curie temperature of 20 ℃,the room temperature has no effect on the cooling capacity of the magnetic refrigeration system over a finite time period.
【Fund】: 天津市科技支撑项目(142CZDNC00016)——微晶化速冻蔬菜加工及保鲜贮运技术集成示范资助~~
【CateGory Index】: TB657
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