Freezing of Supercooling Water Using Magnetic Fluid

To improve the performance of ice thermal storage systems, the problem of freezing on the cooling surface must be addressed. One of the authors has proposed a new ice making method in which a magnetic fluid prevents water from freezing on the cooling surface. Thus, we investigated experimentally the effect of shape control of magnetic fluid using a magnet of freezing of supercooling water. The shape changes and motion of magnetic fluid, which are controlled by controlling the magnetic field, have a slight effect on the supercooling phenomenon. However, the exposure of the cooling surface covered by a film of magnetic fluid reduces the time from controlling the magnetic field until freezing to a few seconds. Therefore, it is possible to use an electric magnet.