By Buy Freezers In The UAE: We’ve discussed cryogenic applications in general and the cryogenic freezer that’s a component of them in our most recent posts. In-depth analysis of a particular cryogenic freezer, the tunnel freezer, will be covered in this blog.
What is the purpose of this application, and what traits do many varieties of tunnel freezers in uae share? You may get all the answers by reading on.
Freezer Tunnel
A common cryogenic freezing technology in the food sector is the tunnel freezer. A tunnel freezer, in essence, is a lengthy cryogenic tunnel used to rapidly chill food goods. At one end of the tunnel, the goods enter hot or at room temperature, and at the other, they emerge frozen.
How does it function? In most tunnel freezers, liquid nitrogen or carbon dioxide are used, both of which have a freezing point of -196 degrees Celsius.
At least these elements are included in a typical tunnel freezer:
- An insulated container that maintains the proper temperature for the items and cryogenic liquids.
- A conveyor belt is used to move the goods through the tunnel.
- A system with an injector that introduces the cryogenic liquid.
- Ventilators to make sure the items are exposed to the chilly air.
- An exhaust system for releasing extra gas.
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Several Kinds Of Freezers In UAE
While the basic components of most tunnel freezers are the same, the precise design may differ significantly. We would like to quickly discuss a few of the major aspects to illustrate the variations between various tunnel freezers in UAE:
Compared To Liquid Nitrogen, Carbon Dioxide
Mostly often, liquid nitrogen or carbon dioxide are used to cool tunnel freezers. The decision between these two refrigerants is difficult, and it partially relies on the product that has to be cooled.
The differences between carbon dioxide and liquid nitrogen have been the subject of much study, and numerous intriguing findings have been drawn.
For instance, carbon dioxide inhibits microbiological development but liquid nitrogen does not. Nevertheless, the carbon dioxide-induced suppression of bacterial growth is only long-lasting when the product is packed in a carbon dioxide-rich environment after chilling.
The same study found that chilling with carbon dioxide improved the preservation of color in several beef items. It is also true that this impact only lasts if the product is packed in a carbon dioxide-rich environment. If not, the color develops similarly to goods that have been frozen with liquid nitrogen.
Liquid nitrogen could provide even more benefits than carbon dioxide. Several of them are included in this Matheson Gas overview. The safety of liquid nitrogen over carbon dioxide is a notable benefit. Moreover, liquid nitrogen cooling is quicker, and freezing systems often need less maintenance.
Different Conveyor Belts
At least one conveyor belt moves the goods through each tunnel freezer as it stores food. Nonetheless, there is a wide range in how this conveyor belt (or conveyor belts) appear. We differentiate between the following types:
- A single conveyor for a cryogenic freezer. This layout is most effective for chilling a certain kind of product, whose surface has to freeze as rapidly as possible to prevent dehydration.
- A cryogenic freezer that has several conveyors. Several product categories may be concurrently cooled in a freezer with various belts. Often times, each conveyor might have its own settings for variables like temperature and belt speed.
- A cryogenic freezer that is perfect for IQF (Individually Fast Frozen) refrigeration and has several staggered conveyor belts. These freezers make sure that when the items are transported down the staggered belts, they are always in motion. As a result, the items are exposed to the refrigerant on all sides, which, among other things, prevents them from freezing together.
- A cryogenic freezer with specially formulated conveyor belts. Smooth stainless steel conveyor belts are provided for fragile objects, preventing harm from, say, an impression from a standard conveyor belt.
The Cryogenic Liquid’s Flow
The tunnel freezer’s design must also take into account how the cryogenic liquid flows. There are several configuration options for the flow:
The cold air flow in a linear tunnel freezer moves in the product’s direction. At the tunnel’s entrance, a cryogenic liquid is injected, and the gases are released at the other end.
The cryogenic liquid is injected at the end of the tunnel in a freezer, and the gases travel in opposition to the product’s flow. At the freezer’s entry, exhaust gases are removed. Products are exposed to cold gases for a longer amount of time in a freezer, which is advantageous.
Positive Aspects Of Tunnel Freezers In UAE
There is a reason tunnel freezers are well-liked. The application is a crucial step in the manufacturing process for many food manufacturers for the following reasons, among others:
Compared to traditional freezing systems, cryogenic tunnel freezers are often smaller. These freezers’ exceptionally low temperatures mean that less lengthy conveyor belts are necessary to completely freeze the goods.
Products are effectively and swiftly chilled using a cryogenic tunnel freezer. Quick cooling ensures that the manufacturing process is not impeded, allowing for increased output and, eventually, increased sales.
Food quality is best kept when it is cooled using a cryogenic tunnel freezer. The quick freezing procedure makes sure that minerals and vitamins are mostly well-kept and that the cell structure is retained. While not all foods fall into this category, certain items actually benefit from a slower freezing procedure. Control rate freezing for these goods is often used.
Tunnel Freezer Cryogenic Infrastructure
Each tunnel freezer has a unique set of specifications, as does the cryogenic network to which it is attached.
All different kinds of tunnel freezers have been connected and installed by Demaco for many years. The freezer will be linked to a storage dewar for the necessary cryogenic fluid, and our team of professionals will make sure it runs at peak efficiency.
The standard components of a cryogenic infrastructure for tunnel freezers include vacuum-insulated transfer lines, the appropriate couplings, and any required quality-improving goods. As a result, the employed cryogenic liquid is of the highest calibre when it enters the tunnel freezer in UAE.
Pipework That Is Vacuum-Insulated
Liquid nitrogen may be securely transferred from a storage tank to a tunnel freezer using vacuum-insulated transfer lines.
