Let's consider the topic of magnetic heating. And first, a little theory. The effect of heating metals in an alternating magnetic field due to eddy currents was first studied back in the 19th century. Scientists Arago and Faraday studied this issue. And the experimenter Foucault described this phenomenon in more detail. That is why eddy currents are also called Foucault currents. Today this phenomenon is widely used in industry and everyday life. This effect is used in induction furnaces of various capacities. And we will assemble an installation that will heat water for heating.
Is it possible to heat water with magnets? Today we will show and tell you how to do this
A dielectric disk with magnets located around the perimeter is connected to an electric motor through a belt drive. There must be an even number of magnets, and their polarity must alternate around the circumference of the disk.
To enhance the effect, another disk of the same type was made, but initially we will conduct experiments with one. A copper tube, bent in the form of a circle, is fixedly fixed between the disks.The tube ring must be short-circuited - in an open coil no induced currents will arise.
That's the whole installation. Now let's conduct some experiments.
To evaluate the work of the magnetic field, we bring an electric coil with a light bulb to the rotating disk. Thanks to the phenomenon of electromagnetic induction, the light bulb begins to glow when the disk rotates.
Let's move on to experiments with heating. We will conduct the first experiment with a part made of sheet aluminum. Let's fix the sheet near the disk with magnets and connect a sensor from a digital thermometer to it. As soon as the disk with magnets began to rotate, the temperature of the aluminum part began to rise. In less than a minute it heated up by more than 40 degrees. Well, it looks like Faraday and Foucault were right. Let's continue the experiments.
Now we will heat the water. Let's install our copper tube and fill it with water. We turn on the disk with magnets, after two minutes the water in the tube began to boil and began to splash out.
Now for a more complex test - let's evaluate the possibility of practical use of the device. We connect our copper circuit to the heating radiator. Fill it with water. Using a small pump from the aquarium, we ensure the circulation of liquid. To increase the performance of our heater, we will install a second disk with magnets. We use current clamps to measure the current consumption of the electric motor. 1.92 Amps.
Two disks work noticeably more efficiently - the temperature begins to rise before our eyes. Efficiency depends not only on the number of magnets, but also on the speed of rotation of the disk. After some time of operation, the thermometer shows 63.9 degrees Celsius. The temperature does not rise higher, this is the limit for this design. But this is a very good result.
What's the result?
It is possible to heat a heating battery with rotating magnetic disks.True, for a sufficient rotation speed it is still necessary to use an electric motor, which means the presence of electricity is necessary. And if electricity is available, there are simpler and more traditional heating methods. The question of effectiveness remains open.
