cryogenics is the study of the production and behaviour of materials at very low temperatures.Cryogenic cooling of devices and material is usually achieved via the use of liquid nitrogens, liquid helium.
The most recent development in cryogenics is the use of magnets as regenerators as well as refrigerators. These devices work on the principle known as the magneto caloric effect.
Cryogenic gases are used in transportation of large masses of frozen food. When very large quantities of food must be transported to regions like war zones, earthquake hit regions, etc., they must be stored for a long time, so cryogenic food freezing is used. Cryogenic food freezing is also helpful for large scale food processing industries.
IN big cities
It is difficult to transmit power by overhead cables in big cities, so underground cables are used. But underground cables get heated and the resistance of the wire increases leading to waste of power. Superconductors could be used to increase power throughput, although they would require cryogenic liquids such as nitrogen or helium to cool special alloy-containing cables to increase power transmission. Several feasibility studies have been performed and the field is the subject of an agreement within the International Energy Agency.
No comments:
Post a Comment