A refrigerated container or reefer is an intermodal container (freight container) used in intermodal freight transport for a temperature sensitive cargo transport.
While the reefer will have an integral cooling unit, they rely on external power, from electric power points ("reefer points") on land-based sites, container ships or on docks. When transported on a ramp on a trailer or on a train carriage, they can be turned on from a diesel-powered generator ("gene set") attached to the container while traveling overland. The cooling container is capable of controlling temperatures ranging from -65 ° C to 40 ° C.
Some reefs are equipped with a water cooling system, which can be used if the reefer is stored under the deck of the vessel without adequate ventilation to remove the heat generated.
The water cooling system is more expensive than the current air vents to remove heat from the cargo space, and the use of the water cooling system decreases. Air cooling and water cooling are usually combined. Air cooling removes heat generated by reefs while water cooling helps minimize the heat generated by coral reefs. The reefs use some heat exchangers that serve as water-cooled condensers: water cooling.
The impact on the reefer community of containers is enormous, allowing consumers worldwide to enjoy fresh produce at any time of the year and experience fresh results that were not previously available from many other parts of the world.
Video Refrigerated container
Cryogenic cooling
Other cooling systems are sometimes used where short travel times are total loss refrigeration, in which frozen carbon dioxide ice (or sometimes liquid nitrogen) is used for cooling. The frozen gas is cryogenically slowly evaporates, and thus cools the container and is removed from it. The container is cooled as long as there is frozen gas available in the system. It has been used in carriages for years, providing up to 17 days of temperature setting. While refrigerated containers are not common for air transport, a total dry dry ice system is usually used. The container has chambers containing solid carbon dioxide and the temperature is controlled by thermostatically controlled electric fans, and the air-transported version is intended to maintain temperatures of up to about 100 hours.
Full-size intermodal containers equipped with this "cryogenic" system can maintain their temperature for the 30 days required for sea transportation. Since they do not require an external power supply, the cryogenically cooled containers can be stored anywhere in any vessel that can accommodate "dry" (non-cooled) sea container containers.
Maps Refrigerated container
Redundant cooling
Precious items, very sensitive to temperature, or dangerous cargo often require the highest system reliability. This type of reliability can only be achieved through the installation of a redundancy cooling system .
The redundant cooling system consists of a primary cooling unit and an integrated back-up. If the main unit malfunctions, the secondary unit automatically starts. To provide reliable power for the cooling unit, the container is often equipped with one or more diesel generators.
Containers equipped with this system may be required to transport certain hazardous goods in compliance with International Maritime Organization regulations.
Reefer types and dimensions
The reefer can not be loaded in a double stack on a flat rail carriage.
See also
References
Source of the article : Wikipedia
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