Experimental investigation on a cooling device using temperature-sensitive magnetic fluid

An automatic cooling device was made by employing a temperature-sensitive magnetic fluid as a coolant. The effects of several factors such as the heat load, the cooling temperature, the heating position and the magnetic field distribution on the cooling performance of the device were investigated experimentally. It is shown that a stable and continuous flow of the temperature-sensitive magnetic fluid was obtained under external magnetic and thermal field, and heat was transferred by the circulating fluid with the absence of a pump. The synergic function between the external magnetic field and the thermal field has impact on the velocity of the working fluid and the cooling performance of the device.