The magnetic refrigeration is a couple of years old concept . Used in cryogenics and astronautics, the magnetic refrigeration was waiting for its D-day to enter also the household refrigerators market. As far as I know, the D-day still has not come…
What´s gadolinium and how the magnetic refrigerator will work (if it will work)
Gadolinium may [...]

The compressor fridge
The compressor sucks the fumes from the evaporator and pressures them so that they get liquid in the refrigerator condensator part. The condensator grid (the grid your fridge has in its back part) emits the portion of the heat to the outer space of the room.
The cooling agnet - being pushed towards the [...]

From the very beginnings, people noticed that the food lasts longer if it is stored in cooler place.
Who invented the refrigerator?
To cool the foodstuffs, the first refrigerators used the natural ice. Around 1755, scottish physician William Cullen used a simple box with larger blocks of ice to keep the inner temperature low.
In the 1790 an [...]