Dewarsäiliöiden

Dewarsäiliöiden, commonly referred to as Dewar flasks or vacuum flasks, are insulated containers designed to store and transport substances at very low temperatures, such as cryogenic liquids. Their primary function is to minimize heat transfer from the surroundings to the contents, thereby preserving the low temperature for extended periods.

The fundamental principle behind a Dewar flask's effectiveness lies in its construction, which involves a double-walled vessel with a vacuum between the walls. This vacuum layer significantly reduces heat transfer through conduction and convection. The inner and outer walls are typically made of glass or stainless steel. For further insulation, the inner and outer surfaces of the walls facing the vacuum space are often silvered or coated with a highly reflective material. This reflective coating minimizes heat transfer by radiation.

Dewarsäiliöiden come in various sizes, from small laboratory flasks to large industrial vessels. They are crucial in numerous scientific and industrial applications. In laboratories, they are used for storing liquefied gases like liquid nitrogen, liquid helium, and liquid oxygen. In the medical field, they are employed for preserving biological samples, such as blood, tissues, and cells, at cryogenic temperatures. Industrially, Dewarsäiliöiden are used in processes involving cryogenics, gas separation, and the transportation of liquefied natural gas (LNG). The design and materials used in Dewarsäiliöiden are optimized to ensure safety and efficiency in handling extremely cold substances.