The design of a rotary active magnetic regenerator heat pump device with a multi-bed concept is presented. Important design features are the rotating two-pole magnet assembly, the laminated iron ring, the 13 fixed tapered regenerator beds, and the dynamically adjustable parallel flow circuit. The optimized magnet design was developed with optimally shaped segments and optimum remanence for the desired magnetic field distribution oscillating between 0 and 1.44 T in the air gap. The iron ring was laminated to reduce the eddy currents, allowing the device to run at cycle frequencies up to 3 Hz. The design of the regenerator housing was optimized with respect to parasitic losses and even flow distribution in both directions. Employing 3.4 kg of La(Fe,Mn,Si)₁₃H_y (CALORIVAC HS) refrigerant and at a hot reservoir temperature of 295 K and a cycle frequency of 0.5 Hz, the heat pump achieved a maximum second-law efficiency of 20.6 %, while providing a heating load of 340 W with a heating COP of 6.7 at a 10.3 K span. The COP values presented only consider the magnetic power and ideal pump power delivered to the AMR, neglecting the pump efficiency. At 1.2 Hz, the device produced a maximum heating power of 950 W while maintaining a 5.6 K span, resulting in a heating coefficient of performance and second-law efficiency of 7.0 and 11.6 %, respectively. The performance demonstrated in this paper could be an important milestone in the development of future magnetocaloric devices.

介绍了具有多床概念的旋转主动磁蓄热器热泵装置的设计。重要的设计特点是旋转两极磁铁组件、叠片铁环、13 个固定锥形蓄热床和动态可调的平行流动回路。优化的磁体设计具有最佳形状的段和最佳剩磁，可实现气隙中在 0 到 1.44 T 之间振荡的所需磁场分布。铁环被层压以减少涡流，使设备能够以高达 3 Hz 的循环频率运行。蓄热室外壳的设计在寄生损失和双向流动分布方面进行了优化。使用 3.4 kg La(Fe,Mn,Si) ₁₃ H _y(CALORIVAC HS) 制冷剂，在 295 K 的热储层温度和 0.5 Hz 的循环频率下，热泵实现了 20.6 % 的最大第二定律效率，同时提供了 340 W 的加热负载和 6.7 的加热 COP跨度为 10.3 K。所提供的 COP 值仅考虑提供给 AMR 的磁功率和理想泵功率，而忽略了泵效率。在 1.2 Hz 时，该设备产生的最大加热功率为 950 W，同时保持 5.6 K 跨度，导致性能加热系数和第二定律效率分别为 7.0 % 和 11.6 %。本文所展示的性能可能是未来磁热设备发展的一个重要里程碑。