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40' REFRIGERATED

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INSIDE LENGTH: 11,840 m;

WIDTH INSIDE:2,286 m;

HEIGHT INSIDE:2,120 m;

DOOR WIDTH:2,286 m;

DOOR HEIGHT:2.195 m;

CAPACITY:60 m³;

TARE WEIGHT:3850 kg;

MAXIMUM CARGO WEIGHT:26630 kg;

DESCRIPTION:The refrigeration unit is arranged in such a way that the external dimensions of the container meet ISO standards and thus fit in the guides of the container ship's cell, for example. The presence of an integral cooling unit entails a loss of internal volume and payload.

When being transported by ship, the integrated units must be connected to the onboard power supply system. The number of reefer containers that can be connected depends on the capacity of the ship's power supply system. If the above-mentioned capacity is too low for the refrigerated containers to be transported, ​​"power blocks", which are equipped with diesel generators relatively large and meet ISO requirements for the dimensions of a 20' container. When at the terminal, the containers are connected to the terminal's power system. For road and rail transport, most integral refrigeration units are operated by a genset (generator set). This can be a component of the refrigeration unit or connected to the refrigeration unit.

Air flows through the container from bottom to top. In general, "hot" air is drawn from inside the container, cooled in the refrigeration unit, and then blown back into the container as cold air.

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To ensure proper circulation of cold air, the floor is provided with grids. Pallets form additional space between the container floor and the cargo, also forming a satisfactory airflow channel. In addition, the side walls of the container are "rippled", which ensures satisfactory airflow there as well.

At the top of the container, adequate space (at least 12 cm) must also be provided for air flow. To this end, when packing the container, adequate free space must be left above the cargo. The maximum load height is marked on the side walls.

To ensure vertical airflow from bottom to top, the package must also be properly designed and the cargo must be properly stowed.

In addition to temperature regulation, the integrated units also allow for controlled fresh air exchange, for example for the removal of metabolic products such as CO2 and ethylene in the case of transporting fruit.

In refrigeration units, the inlet and return air temperatures are measured and, depending on the operating mode, one of these values is used to control the cold air. Temperature measurement can be performed in several ways. The Partlow logger usually records the return air temperature as it provides an indication of the state or temperature of the load. Data loggers are increasingly used, which detect the temperature digitally and indicate it on a display. Once transferred to a PC, the data can be evaluated.

The temperature indicator is affixed to the outside of the refrigeration unit, so that unit operation can be checked at any time.

Digital or analog loggers can also be positioned directly on the cargo to measure the temperature inside the container. The recorder must be accommodated in order to record the temperatures at the risk points of the container (inside the package, top layer at the end of the door).

Integral units can be stored above and below decks on a ship. Above deck stowage has the advantage that heat from the return air can be dissipated more easily. However, containers are often exposed to strong solar radiation, leading to increased cooling capacity requirements.

 

Usage: Refrigerated containers are used ​​ for goods that need to be transported at a constant temperature above or below the freezing point. These products are divided into refrigerated products and frozen products depending on the specified transport temperature. They mainly include fruits, vegetables, meat and dairy products such as butter and cheese.

High cube integral units are used in particular for bulky and light products (eg fruits, flowers).

Nowadays, goods that require refrigeration are mostly transported in integrated units, which have a markedly higher market share than porthole containers.

Chilled meat is also sometimes transported suspended, for which the roofs of refrigerated containers are equipped with special hook grids

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