Analysis of Selection Techniques for Thermal Insulation Materials in Seafood Freezer Construction

What are the characteristics of a seafood freezer? Let's get to know the features of this product. In our daily life, we often come across seafood and other products that need to be frozen. Especially in summer, the weather is extremely hot. Due to the intense heat, seafood products tend to spoil quickly.

Therefore, to prevent these products from spoiling, we can store them in a professional seafood freezer. The temperature of a seafood freezer is generally designed to be within the range of -30°C to -60°C or -18°C to -23°C.

So, how do you determine what temperature your planned seafood freezer should have? Let's first talk about the seafood freezer with a temperature range of -30°C to -60°C. In fact, the difference in storage time between the -30°C to -60°C and -18°C to -23°C seafood freezers is that the -30°C to -60°C seafood freezer belongs to a "processing" low - temperature cold storage. It is mainly used for the quick - freezing processing of fresh seafood, aquatic products, fish, and shrimp. The -30°C to -60°C seafood freezer can also be called a seafood quick - freezing warehouse.

On the other hand, the -18°C to -23°C seafood freezer belongs to a "long - term storage" low - temperature cold storage. It is mainly used for the long - term storage of frozen seafood, aquatic products, fish, shrimp, and meat to prevent the previously quick - frozen products from thawing.

So, how should we choose the insulation materials for these two different types of seafood freezers? In fact, in our previous articles, we have mentioned the selection of insulation panels for cold storage design, stating that "the lower the temperature, the thicker the insulation material required." However, this is generally for ordinary cold storages.

There are exceptions, of course. For example, in the case of a controlled - atmosphere storage (CA storage), which is mostly used for storing fruits and vegetables. According to normal thinking, the temperature of a cold storage for fruit preservation is generally between 0°C and 5°C. So, would a 100 - mm - thick polyurethane insulation material be sufficient?

In fact, it still needs to be determined according to the actual situation. A CA storage has requirements for the gas composition inside the storage, and thus also has higher requirements for the insulation and sealing performance of the storage panels. However, for general low - temperature cold storages, the commonly selected insulation materials are 100 mm, 150 mm, or 200 mm thick. Specifically, it also depends on the region and the customers' requirements.