And the refrigerant said goodbye to the magnetocaloric effect of the refrigerator air-conditioning will come out

The magnetocaloric effect is a phenomenon in which a magnetic substance generates heat in a magnetic field environment and becomes cold after leaving. This principle can be used as an air conditioner without refrigerant (figure / Wikipedia)

Summer is getting hotter and hotter, and air-conditioning is becoming more and more important, but now the air-conditioning requires a compressor to circulate the refrigerant, and the refrigerant takes away the heat. Therefore, the air-conditioning consumes a lot of electricity, and the refrigerant is not good for the environment. . Future air-conditioning and refrigerators may be made using the principle of "Magnetic Refrigeration". Two suitable magnetic materials have been available.

The next big future reports that the magnetocaloric effect means that the magnetized material will rise in the magnetic field, but once it leaves the magnetic field, the temperature will decrease. This was discovered by German physicist Emil Warburg in a pure iron experiment in 1881. Since then, many people have been studying related fields and have succeeded in creating extremely low temperatures. However, it has not been used in air-conditioning and refrigerators because of its large size and expensive magnetized materials.

The Energy Efficiency Office led by the US Department of Energy, the CaloriCool material testing team, found two easy-to-manufacture magnetized materials that are 50% more effective than the past magnetization cooling. They believe these two New refrigeration magnetized materials can create more energy savings than current gas compression systems.

Vitalij Pecharsky, a member of the team at Idaho State University in the United States, said: "The scientific community has long known about the magnetocaloric effect, but the magnetization of materials is expensive and has been applied to household appliances and air conditioning systems. The important obstacles. The two materials we have discovered now are made up of common elements, which means that once they enter mass production, the manufacturing costs will be quite cheap."

The research team believes that household air-conditioning and refrigerators, which are dominated by magnetocaloric effects, will be available within 10 years. Professor Bechaski said: "The magneto-heat effect refrigerator will suddenly become popular around the world like LEDs quickly replace bulbs."