Energy harvesting via fluidic agitation of a magnet within an oscillating heat pipe
Energy harvesting via fluidic agitation of a magnet within an oscillating heat pipe
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通过振荡热管内磁体的流体搅拌来收集能量
DOI：
10.1016/j.applthermaleng.2017.10.076
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发表时间：
2018
影响因子：
6.4
通讯作者：
Shamsaei, Nima
中科院分区：
文献类型：
--
作者：
Monroe, J. Gabriel;Ibrahim, Omar T.;Thompson, Scott M.;Shamsaei, Nima
开发了一种“振荡磁体”能量收集模块，并将其集成到充满水的4匝管状振荡热管（OHP）中。收集模块由缠绕在聚碳酸酯管周围的1000圈螺线管和两个横向柱组成，所述横向柱穿过管放置在螺线管上方和下方。电磁感应是通过放置在横向柱之间的悬浮钕磁体的热驱动流体搅拌来实现的。实验研究了这种“永磁体OHP”（OMHP）的热性能和能量收集能力，在一系列热输入下，使用直径为1.59 mm或3.17 mm的钕磁体。结果表明，OMHP的传热性能下降的磁铁直径接近的OHP管，由于增加的局部压力下降，这破坏了蒸发器和冷凝器之间的平流。在400 W的热输入下，配备有较小振荡磁体（i.e.1.59 mm直径）的OMHP产生的最大峰值电功率为21.9 µW，有效导热系数为107000 W/m K。相比之下，配备有更大振荡磁体（直径i.e.3.17 mm）的OMHP在200 W的热输入下产生428 µW的最大峰值电功率和2600 W/m K的有效热导率。由于受约束的磁体运动与OHP的热传递和内部流体运动耦合，因此OMHP的设计受到能量收集相对于热性能的重要性的驱动。这项技术的独特之处在于它可以用于热管理和原位发电。
An ‘oscillating magnet’ energy harvesting module was developed and integrated into a 4-turn, tubular oscillating heat pipe (OHP) filled with water. The harvesting module consisted of a 1000-turn solenoid wrapped around a polycarbonate tube and two transverse posts, which were placed through the tube above and below the solenoid. Electromagnetic induction was accomplished via the thermally-driven, fluidic agitation of a suspended neodymium magnet placed between the transverse posts. The thermal performance and energy harvesting ability of this ‘oscillating-magnet OHP’ (OMHP) was experimentally investigated over a range of heat inputs with either 1.59 mm or 3.17 mm diameter neodymium magnets. Results demonstrate that the OMHP heat transfer performance decreased as the magnet diameter approached that of the OHP tube due to increased local pressure drops across the magnet, which disrupted advection between the evaporator and condenser. At 400 W of heat input, the OMHP equipped with a smaller oscillating magnet (i.e.1.59 mm diameter) produced a maximum peak electrical power of 21.9 µW and provided an effective thermal conductivity of ∼7000 W/m K. In contrast, the OMHP equipped with a larger oscillating magnet (i.e.3.17 mm diameter) produced a maximum peak electrical power of 428 µW and an effective thermal conductivity of ∼2600 W/m K at 200 W of heat input. Since the confined magnet motion is coupled with the heat transfer and internal fluid motion of the OHP, the design of the OMHP is driven by the importance of energy harvesting relative to thermal performance. This technology is unique in that it can be used for thermal management and in situ electric power production.
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DOI：
--
发表时间：
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期刊：
影响因子：
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DOI：
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发表时间：
2013
期刊：
IEEE ASME International Conference on Advanced Intelligent Mechatronics
影响因子：
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作者：
Xuezheng Jiang;Yancheng Li;Jianchun Li
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DOI：
--
发表时间：
2012
期刊：
影响因子：
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作者：
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Kuo