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- Title
High-performance thermomagnetic generator controlled by a magnetocaloric switch.
- Authors
Liu, Xianliang; Chen, Haodong; Huang, Jianyi; Qiao, Kaiming; Yu, Ziyuan; Xie, Longlong; Ramanujan, Raju V.; Hu, Fengxia; Chu, Ke; Long, Yi; Zhang, Hu
- Abstract
Low grade waste heat accounts for ~65% of total waste heat, but conventional waste heat recovery technology exhibits low conversion efficiency for low grade waste heat recovery. Hence, we designed a thermomagnetic generator for such applications. Unlike its usual role as the coil core or big magnetic yoke in previous works, here the magnetocaloric material acts as a switch that controls the magnetic circuit. This makes it not only have the advantage of flux reversal of the pretzel-like topology, but also present a simpler design, lower magnetic stray field, and higher performance by using less magnetocaloric material than preceding devices. The effects of key structural and system parameters were studied through a combination of experiments and finite element simulations. The optimized max power density PDmax produced by our device is significantly higher than those of other existing active thermomagnetic, thermo, and pyroelectric generators. Such high performance shows the effectiveness of our topology design of magnetic circuit with magnetocaloric switch. The utilization of waste heat is an important way of combining energy saving to emission reductions. Here, authors demonstrate a magnetocaloric material as a controlling switch in a thermomagnetic generator for waste heat recovery.
- Subjects
WASTE heat; MAGNETIC circuits; WASTE recycling; HEAT recovery; ENTHALPY; MAGNETIC fields
- Publication
Nature Communications, 2023, Vol 14, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-023-40634-x