小型室温磁制冷系统的研制

发布时间：2018-01-30 04:25

本文关键词： 室温磁制冷机磁热效应制冷温跨利用系数　出处：《低温工程》2017年01期 　论文类型：期刊论文

【摘要】：设计并搭建了一台小型室温磁制冷系统,进行了初步性能实验研究。系统采用双层同轴Halbach永磁组,磁体旋转后可在中心处获得最大1.3 T磁场;在主动磁回热器两端设计了双通道流路,可有效避免系统流体死体积;驱动控制系统利用多轴伺服驱动器对磁体和水力活塞运动进行控制。样机采用了直径0.55—0.80 mm钆球作为制冷工质、p H值为11的氢氧化钠溶液为换热流体,进行了初步实验研究,考察了利用系数对制冷温跨的影响等。在高低温端绝热与运行频率0.60 Hz的情况下,实验获得13.3 K的最大无负荷制冷温跨;在运行频率为0.4 Hz时最佳利用系数为0.35,此时无负荷制冷温跨为12.1 K。
[Abstract]:A small room temperature magnetic refrigeration system was designed and built, and the preliminary performance of the system was studied. The system adopted double layer coaxial Halbach permanent magnet group. The magnetic field of 1.3 T can be obtained at the center of the magnet after rotation. A two-channel flow path is designed at the two ends of the active magnetic regenerator, which can effectively avoid the dead volume of the system fluid. The drive control system uses multi-axis servo driver to control the movement of magnet and hydraulic piston. The prototype adopts 0.55-0.80mm gadolinium ball as refrigerant. A preliminary experimental study of sodium hydroxide solution with pH value of 11 as heat transfer fluid was carried out. The influence of the utilization coefficient on the refrigeration temperature span was investigated. Under the condition of high and low temperature end adiabatic and operating frequency of 0.60 Hz, the maximum cooling temperature span of 13.3 K was obtained. When the operating frequency is 0.4 Hz, the optimum utilization coefficient is 0.35, and the temperature span of no-load refrigeration is 12.1 K.
【作者单位】：中国科学院理化技术研究所中国科学院低温工程学重点实验室;中国科学院大学;
【基金】：国家自然科学基金(No.51322605,No.51271192)项目资助
【分类号】：TB657
【正文快照】： (1Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Beijing 100190,China)(2University of Chinese Academy of Sciences,Beijing 100049,China)1引言当今世界,人们越来越多地关注环境和能源问题。基于磁热效应的固态制冷技术-磁制冷技术,具有绿

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