Development of magnetically-driven cooling device with concentric pipe structure
Development of magnetically-driven cooling device with concentric pipe structure
复制标题
同心管结构磁力驱动冷却装置的研制
DOI：
10.1177/0954406219827039
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
T. Bessho
中科院分区：
文献类型：
--
作者：
H. Yamaguchi;H. Yamasaki;T. Bessho
温敏磁流体是一种智能能源载体材料。温敏磁性流体最有趣的方面是通过磁场主动控制热流行为。基于随温度变化的磁化效应，温敏磁性流体可以作为能量转换系统，自动传递热能。在工程应用中的优势在于完全不消耗外部能源，可以在不消耗外部动力的情况下长距离输送大量热量。考虑到这一优点，本研究新设计了一种磁驱动冷却装置，用于回收低温到高温废热。对同心管结构冷却装置的基本性能进行了实验研究，并从磁流体力学的角度对装置中获得的数据进行了详细检验。在本研究中，为了研究本实验装置的基本传热特性，使用电磁体作为外部磁场，使得磁场可以连续改变。然而，对于实际装置来说，它可以很容易地更换为永久性的，而无需额外的电能。结果表明，在55.8kA/m的磁场作用下，二元温敏磁性流体可以以2.0 × 10−3 m3/min的高流量自由循环。结果发现，新设计的装置在空气温度为623 K时可传递超过250 W的热能，系统整体效率为11.0%。
Temperature-sensitive magnetic fluid is a smart material for energy carrier. The most interesting aspect of temperature-sensitive magnetic fluid is that the thermal flow behavior is actively controlled by means of magnetic field. Based on the effect of the temperature-dependent magnetization, temperature-sensitive magnetic fluid can be utilized as an energy conversion system, which can automatically transfer the thermal energy. The advantage in the engineering application can be derived from the fact that there would be entirely no external energy consumption, with which large amount heat can be transported for a long distance without any external power consumption. Taking into account of the advantage, a magnetically-driven cooling device is newly designed for recovering of low- to high-temperature waste heat in the present study. The basic performance of the cooling device with concentric pipe structure is investigated experimentally and data gained in the device is examined in detail in view of magneto-hydrodynamics. In the present study, electromagnet is used as an external magnetic field for the purpose of investigating basic heat transfer characteristics of the present experimental device, so that the magnetic field can be continuously altered. However, it can be easily replaced to a permanent for the practical device without additional electrical energy. The results show that the binary temperature-sensitive magnetic fluid can be circulated freely with a high flow rate of 2.0 × 10−3 m3/min by imposing the magnetic field of 55.8 kA/m. It is found that the newly designed device can transfer thermal energy more than 250 W with overall system efficiency of 11.0% at air temperature of 623 K.
影响因子：
2.1
作者：
S. Shuchi;T. Mori;H. Yamaguchi
通讯作者：
S. Shuchi;T. Mori;H. Yamaguchi