Cryotainer Reservoir Structure
Structure of Cryotainer Oxygen and Nitrogen Liquid Reservoirs
Cryogenic liquids (liquid oxygen and nitrogen) due to extreme cold, should be stored in special double-walled tanks called cryotainer (Cryotainer), to have the least waste and product losses .Cryotinners are designed and manufactured to be able to store cryogenic liquids with a temperature of -196 ° C in an environment with a maximum temperature of 50 ° C inside.
The inner tank of the cryotiners is made of Austenitic stainless steel. To withstand very low temperatures.
In the construction of this type of tanks, an attempt has been made to minimize the ways of heat transfer to the internal tank, to reduce losses and waste of the product as much as possible, and to maximize its storage time.
In nature, heat is transferred in three ways, so in the construction of cryotiner tanks, these three ways of heat transfer, which are as follows, are countered.
Heat transfer through solids by direct contact
Conduction
When two objects have a temperature difference and are joined together, the temperature is transferred from the warmer body to the colder body, until the temperatures of both are equal. Example: If we place a cold metal on a hot metal, it is also hot. May be.
To prevent this heat transfer, Cryotainer tanks are double-walled and both internal and external tanks are connected by stainless steel clamps. Although the metal conducts more heat than wood and fiberglass, these fasteners are made of thinner heat to transfer the least amount of heat.
Heat transfer through fluids by molecular displacement
Convection
This happens when a part of a liquid or gas is heated, due to expansion and distance
Their molecules and their lightness move upwards. They are replaced by a portion of the gas or liquid that is colder, more contractile, and heavier. Like a lighted heater in a room and the rotation and movement of air inside the room.
To prevent this heat transfer, the air between the two walls of the tank is vacuumed so that air molecules do not transfer heat from the outer wall to the inner tank, and between the two walls is white perlite powder, the best type of which is Santocel They fill to minimize heat transfer through the movement of air molecules with the help of this insulation and vacuum created.
Heat transfer through light radiation or electromagnetic waves
Radiation
In this type of heat transfer, there is usually no contact between the heat source and the heating object. The heat energy emitted by light or electromagnetic waves is absorbed by the body atom and causes its electrons to jump to a higher energy level, such as heat. The sun that heats every body.
To combat this type of heat transfer, the outer hull of the tanks is covered with two coats of paint, the first coating to combat corrosion (kerogen) and the second coating with white polyurethane epoxy to reflect sunlight and heat.
Priestley Gas Industries, with its twenty-five years of experience in the production of oxygen and liquefied nitrogen gases, has been established and put into operation in 1392. This group has taken a small step towards the self-sufficiency of our beloved country Iran by providing part of the needs of the pharmaceutical industry, food companies, casting companies, laser cutting, cable manufacturing, chemical industries and hospitals.