Do you know the commonly used knowledge of cold storage?

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Common cold storage knowledge!
1、 Cold storage classification
Cold storage is usually divided into three temperatures: high temperature, medium low temperature, and ultra-low temperature. Different ingredients require different temperatures.
High temperature cold storage
High temperature cold storage is what we call a refrigerated and fresh storage cold storage. The temperature is usually above 0 ℃, and it is usually used to store fruits and vegetables, eggs, medicinal materials, wood preservation, dryness, etc. Adhere to a temperature usually around 0 ° C and use a cold air blower for blowing cooling.
Medium and low temperature cold storage
Medium to low temperature cold storage, also known as high temperature frozen cold storage, is typically used to store meat, water products, and products suitable for this temperature range, with temperatures typically within -18 degrees Celsius.
Low temperature cold storage
Low temperature cold storage, also known as frozen storage or frozen cold storage, usually has a temperature of around -20 ° C~-30 ° C, and is used to freeze food through a cold air blower or specialized freezing equipment.
Ultra low temperature cold storage
Ultra low temperature cold storage, with a temperature range of ≤ -30 ℃, is primarily used for frozen food, industrial experiments, medical applications, and other special purposes. Compared to the above three types, its use on the market needs to be slightly smaller.
Medium temperature cold storage usually uses 100MM thick cold storage boards, while low temperature and frozen storage usually use 120MM or 150MM thick storage boards. The foam density of cold storage boards is between 38KG and 40KG/cubic meter according to national regulations.
2、 Calculation of Cold Storage Capacity
Calculate the tonnage of the cold storage: (calculated based on the design specifications and relevant national standards for cold storage capacity):
Internal volume of refrigeration room × Volume utilization coefficient × Unit weight of food=tonnage of cold storage.
The first step is to calculate the actual available and storage space inside the cold storage: the internal space of the cold storage - the aisle space that needs to be reserved in the warehouse, the location occupied by internal equipment, and the space that needs to be reserved for internal air circulation (which can be estimated or calculated according to the volume utilization coefficient in Table 1);
The second step is to search for the weight of items that can be stored per cubic meter of space based on the category of inventory items, and multiply this to determine how many tons of products can be stored in the cold storage; 
500-1000 cubic meters=0.40;
1001-2000 cubic meters=0.50;
2001-10000 cubic meters=0.55;
10001-15000 cubic meters=0.60.
Note: Based on our experience, the actual usable capacity is greater than the capacity utilization coefficient defined by the national standard. For example, the capacity utilization coefficient for a cold storage area of 1000 cubic meters in the national standard is 0.4. If scientifically and effectively arranged, the actual utilization coefficient can generally reach 0.5-0.6.
Unit weight of food in active cold storage:
Frozen meat: can store 0.40 tons per cubic meter;
Frozen fish: can store 0.47 tons per cubic meter;
Fresh fruits and vegetables: can store 0.23 tons per cubic meter;
Machine made ice: can store 0.75 tons per cubic meter;
Frozen sheep cavity: can store 0.25 tons per cubic meter;
Bone removal and meat cutting: can store 0.60 tons per cubic meter;
Box packed frozen poultry: can store 0.55 tons per cubic meter.