30P compressor, 16 square cables.
40 high freezer: inner size 11.62m X 2.29m X 2.50m / distribution gross weight is generally 22 tons / volume 67 cubic meters.
There are two types of refrigerated containers: external and internal. The temperature can be adjusted between -60°C ~ +30°C.
The built-in container can start the freezer at will during transportation to keep the container at the specified temperature; The external type must rely on the freezers equipped on special container vehicles, ships and special yard stations for cooling. This box is suitable for transporting butter, chocolate, frozen fish, condensed milk, margarine, etc. in summer.
When transporting frozen goods in refrigerated containers, the temperature should not be higher than -18°C. Usually foot refrigerated containers, the average cooling rate is 31.3°C/h (empty containers); However, after loading, due to the large heat capacity of the goods, the cooling speed will be greatly slowed down, and sometimes it takes 15-16h to reach the set temperature requirements. If the incoming temperature is high, it takes 2-3d to reach the set temperature.
The temperature rise and decrease speed in the refrigerated and frozen container is related to the cargo loaded in the box, and when the set temperature range is reached -18 °C ± 3 °C, the temperature in the box should be maintained. However, when calculating the temperature rise in the refrigerator when the refrigerator is not cooled, the following empirical formula can be used as the standard value
1. Cooling goods (when not ventilated) 0.0054*(tw-tn)°C/h
2. Frozen goods 0.0067*(tw-tn) °C/h
where tw and tn are the outside temperature and the temperature inside the box, respectively.
